*C@@Degrees Celsius
*F @@Degrees Fahrenheit
*D* @@Drive 
*N* @@Neutral Position
*P* @@*PARK*Position 
*P* @@*PARK* Position
O2@@Oxygen
2WD@@Two-Wheel Drive
4WD@@Four-Wheel Drive
4WS@@Four-Wheel Steering
A @@A-post, A-pillar 
A @@Amperes 
A @@*Amper *Ammeter *Advance *
A.I.R. @@Air Injection Reactor 
A.M. @@Above-Mentioned 
A/C @@Air Conditioning 
A/C @@A/C Amplifie 
A/C CLTCH. @@A/C Clutch 
A/CL @@Air Cleaner 
A/CL-BM @@Air Cleaner Bimetal Sensor 
A/CL-CWM @@Air Cleaner Cold Weather Modulator 
A/CL-DV @@Air Cleaner Duct Valve Vacuum Motor 
A/CL-TSOV @@Air Cleaner Temperature Sensor Override Valve 
A/CL-VCD @@Air Cleaner Vacuum Control Delay 
A/CL-VCV @@Air Cleaner Vacuum Control Valve 
A/CL-VM @@Air Cleaner Vacuum Motor 
A/F @@Air-Fuel Ratio 
A/T @@Automatic Transaxle Or Transmission 
AA @@Automobile Association (UK) 
AAA @@American Automobile Association 
AAC @@Auxiliary Air Control 
AAC @@Automatic Amplitude Control 
AACV @@Auxiliary Air Control Valve 
AAD @@Auxiliary Air Control Device 
AAE @@America Association of Engineers 
AAMVM @@American Association of Motor Vehicle Manufacturers 
AAP @@Auxiliary Accelerator Pump 
AAP @@Auxiliary Accelerating Pump 
AAP @@Ambient Absolute Pressure 
AAS @@Aspirator Air System 
AAS @@Auto Adjust Suspension 
AAS @@Air Adjust Screw 
AAS @@American Astronautical Society 
AAS @@Air Adjust Screw 
AASHTO @@American Association of State Highways and Transportation Officials 
AAV @@Anti Afterburn Valve 
AB @@Air Bleed 
ABA @@Air Bleed Actuator 
ABCV @@Air Bleed Control Valve 
ABDC @@After Bottom Dead Center 
ABG @@Alcohol Blended Gasoline 
ABN @@Airborne Noise 
ABP @@Air Brake Proportioing (valves) 
ABRS @@Air Bag Restraint System 
ABS @@Altitude Barometric Switch 
ABS @@Anti-Lock Brake System 
ABS @@American Bureau of Standards 
Abs @@Absolute 
ABS Visc @@Absolute Viscosity 
ABSV @@Air Bypass Solenoid Valve 
ABV @@*Anti Backfire Valve *Air Bypass Valve *
ABV @@Air Bypass Valve 
ABV @@Anti-Backfire Valve 
AC @@Air Condition 
AC @@Alternating Current Generator 
AC @@*Alternating Current *After Contro *
AC @@AC Auxiliary Fan Relay 
AC @@AC Compressor Safety Switch 
AC @@AC Condenser Blower Motor Relay 
AC @@AC Control Unit 
AC @@AC Diode 
AC @@AC Evaporator Motor Relay 
AC @@AC Evaporator Pump Line Fuse 
AC @@AC High Pressure Safety Switch 
AC @@AC Idle Boost Valve 
AC @@Alternating Current 
AC @@Ante Christum 
AC @@Accumulator 
AC @@Acid 
AC @@Analogue Computer 
AC @@Automatic Control 
AC @@Air-Cooled 
AC @@Armored Car 
AC @@Adaptive Control 
AC @@Aerodynamic Center 
AC @@Air Cooling 
AC @@Air Cycle 
AC @@Automatic Clutch 
ACC @@A/C Clutch Compressor 
ACC @@Air Conditioning Clutch 
ACC @@Air Conditioning Clutch Switch 
ACC @@Automatic Climate Control 
ACC @@*Accessary *Altitude Compensation Carb *
Accel @@Accelerator 
ACCS @@A/C Clutch Cycling Switch 
ACCS @@Air Conditoning Cycling Switch 
Accum @@Accumulator 
ACCWM @@Air Cleaner Cold Weather Modulator 
Accy @@Accessory 
ACD @@Auxiliary Control Device 
ACD @@Air Conditioning Demand 
ACD @@Air Conditioning Demand Switch 
ACDV @@Air Cleaner Diverter Valve 
ACE @@Air Conditioning Equipment 
ACE @@Automatic Check Equipment 
ACE @@Automatic Computing Equipment 
ACE @@Air Conditioning Equipment 
ACG @@Alternating Current Generator 
ACG @@Automatic Control Gear 
ACID TEST CYC-LE @@Acceleration,Cruise, Idle,Deceleration Test Cycle 
ACIS @@Acoustic Control Iduction System 
Ack @@Acknowledge 
ACKV @@Air Check Valve 
ACL @@Air Clearner 
ACL @@Automatic Chassis Lubrication 
ACM @@Advanced Composite Materials 
ACON @@Air Conditioning On 
ACP @@Air Conditioning Pressure 
ACP @@Auxiliary Control Panel 
ACRS @@Air Cushion Restraint System 
ACS @@Air Conditioning System 
ACS-O @@Access Opening 
ACT @@Air Charge Temperature 
ACT @@Air Charge Temperature Sensor 
ACTE @@Automatic Checkout Test Equipment 
Actu @@Actuator 
Actv @@Active 
ACV @@Air Control Valve 
ACV @@Air Cut Valve 
ACV @@Armored Command Vehicle 
ACV @@Air Control Valve 
AD @@Anno Domini 
AD @@Aerodynamic Decelerator 
ADC @@Analog-Digital Converter 
ADD @@Addition *
ADECS @@Automotive Diesel Electronic Control System 
ADF @@Aerodynamic Drag Factor 
Adj @@Adjust or Adjustable 
ADL @@Automatic Door Lock 
ADP @@Air-Driven Hydraulic Pump 
ADS @@Adaptive Damper System 
ADV @@Wiper Pressure Control 
Adv @@Advance 
AE @@Acceleration Enrichment 
AE @@Acoustic Emission 
AEA @@Automotive Electrical Association (US) 
AEC @@Automotive Emission Control 
AECD @@Auxiliary Emission Control Device 
AEI @@After End of Injection 
AERA @@Automotive Engine Rebuilders Association (US) 
AESC @@American Engineering Standards Committee 
AETS @@Automatic Engine Test System 
AF @@Air-Fuel Ratio 
AF @@Auxiliary Fuel 
AFC @@Airflow Controlled 
AFC @@Airflow Controlled Fuel Injection 
AFC @@Air Fuel Control 
AFC @@Automatic Frequency Control 
AFC @@Airflow Control 
AFCO @@Automatic Fuel Cutoff 
AFCV @@Air Fuel Ratio Control Valve 
AFE @@Automobile Fuel Economy 
AFER @@Air-Fuel Equivalence Ratio 
AFR @@Air-Fuel Ratio 
AFS @@Airflow Sensor 
AFS @@Auxiliary Fuel Supply System 
AG @@Air Guard 
AGO @@Automotive Gas Oil 
AGT @@Automotive Gas Turbines 
AGV @@Automatic Guided Vehicle 
AGVS @@Automatic Guided Vehicle System 
AH @@Amper Hour 
AHFSS @@Air Conditionig / Heater Function Select Switch 
AI @@Air Injection 
AICV @@Air Injection Check Valve 
AID @@Air Injection Dual 
AIR @@Air Injection Reaction 
AIR @@Air Injector Reactor 
AIR BPV @@Air Bypass Valve 
AIR COND RLY @@Air Conditioner Relay 
AIR COND SIG @@Air Conditioner Singnal 
Air @@Sel Air Selector 
AIR-CHV @@AIR Check Valve 
AIR-DVLV @@AIR Diverter Valve 
AIR-IVV @@AIR Idle Vacuum Valve 
AIS @@Air Injection Single 
AIS @@Air Injection System 
AIS @@Automatic Idle Speed 
AIV @@Air Injection Valve 
AIVV @@AIR Idle Vacuum Valve 
AKI @@Anti-Knock Index 
AL @@Acceleration Level 
ALC @@Automatic Level Control 
ALCL @@Assembly Line Communication Link 
ALDL @@Assembly Line Diagnostic Link 
ALDL @@Assembly Line Data Link 
Ali @@Alignment 
Alm @@Alarm 
ALR @@Automatic Locking Retractor 
ALR @@Automatic Length Adjusting and Locking Retractor 
ALR @@Automatic Locking Retractor 
Alt @@Alternator or Altitude 
Alt @@Alternator 
ALU @@Arithmetic and Logical Unit 
AM @@Amplitude Modulation 
Amb @@Ambient 
AMC @@American Motors Corporation 
AMGV @@Air Management Valve 
Amm @@Ammeter 
Amp @@Amplifier 
Amp @@Ampere 
AN @@Above-Named 
AN @@Annual 
AN @@Anode 
ANC @@Active Noise Control System 
ANL @@Automatic Noise Limiter 
ANS @@Answer 
ANSI @@American National Standards Institute 
Ant @@Antenna 
ANTBV @@Anti-Backfire Valve 
Anti-Dsl @@Anti-Diesel 
AO @@Air Operated 
AOC @@Air Oil Cooler 
AOC @@Automatic Overload Control 
AOD @@Automatic Overdrive 
AOQ @@Average Outgoing Quality 
AOT @@Automatic Overdrive Transmission 
AP @@Air Pump 
APC @@Automatic Phase Control 
APC @@Automatic Power Control 
APC @@Automatic Program Control 
APC @@Armored Personnel Carrier 
APC @@Automatic Performance Control 
APCV @@Air Pump Control Valve 
APDV @@Air Pump Diverter Valve 
API @@American Petrol Institude 
App @@Apparatus 
App @@Appendix 
App @@Approved by 
Approx @@Approximation 
Apr @@Apprentice 
APRA @@Automotive Parts Rebuilders Association(US) 
APREVLV @@Air Pump Relief Valve 
APU @@Auxiliary Power Unit 
AQ @@Aqua(Water) *
AR @@Air Regulator 
AR @@Axle Ratio 
ARC @@Acceleration Signal 
ARQ @@Automatic Error Request Equipement 
ARV @@Armored Recovery Vehicle 
AS @@Airflow Sensor 
AS @@American Standard 
AS @@Air Suction 
AS @@Automatic Synchronizer 
ASA @@American Standard(s) Association 
ASA @@Acoustical Society of America 
ASC @@Automatic Stability Control 
ASCD @@Auto Speed Control Device 
ASCPS @@Air Switch Canister Purge Solenoid 
ASCPT @@Air Switch Canister Purge Timer 
ASD @@Auto Shut Down 
ASDM @@Air Bag System Diagnostic Module 
ASDV @@Air Switching Diverter Valve 
ASE @@Automatic Stabilization Equipment 
ASIS @@Abort Sensing and Implementation System 

ASIS @@American Society for Industrial Security 
ASL @@Above Sea Level 
Asm @@Assembly 
ASME @@American Society of Mechanical Engineers 
ASQC @@American Society for Quality Control 
ASRV @@Air Switching Relief Valve 
ASS @@Air Switching Solenoid 
ASS @@Air Suction System 
Ass @@Assembly 
Ass @@Assistant 
Ass @@Association 
Assy @@Assembly 
ASTM @@American Society for Testing and Materials 
ASV @@Air Switching Valve 
ASV @@Air Suction Valve 
ASV @@Air Switching Valve 
ASVS @@Air Switching Vacuum Solenoid 
AT @@Acceptance Test 
AT @@Air Temperature 
AT @@Ampere Turn 
AT @@Angle of Train 
AT @@Automatic Transmission 
AT. @@Air Tight 
At. @@Atmosphere 
ATC @@Automatic Temperature Control 
ATC @@After Top Center 
ATC @@Automatic Temperature Control 
ATC @@Automatic Timing Corrector 
ATDC @@After Top Dead Center 
ATF @@Automatic Transmission Fluid 
Atm @@Atmosphere 
ATM @@Automatic Transmission 
ATM @@Actuator Test Modes 
ATO @@Automatic Train Operation 
ATS @@Air Temperature Sensor 
ATS @@Automatic Train Stopper 
ATT @@Attenuation 
ATV @@Above the Throttle Valve 
ATX @@Automatic Transaxle 
AUTO @@Automatic 
Aux @@Auxiliary 
AV @@Air Valve 
Avg @@Average 
AVOM @@Analog Volt-Ohm Meter 
AVSV @@Air Vent Solenoid Valve 
AWD @@Air Warning Device 
AWD @@All Wheel Drive 
AWP @@Average Working Pressure 
AWP @@Awaiting Parts 
AXOD @@Automatic Overdrive Transaxle 
AZS @@Automatic Zero Set 
B @@B-pillar B
B @@B-post B
B+ @@Battery Positive Voltage 
B/P @@EGR Back Pressure Transducer EGR 
B/P @@Backpressure 
B/S @@Bore-to-Stroke Ratio 
B/S @@Bill of Sale 
B/U @@Back-Up 
BA @@(cylinder)Bore Area 
BA @@Bumper to Center Line of the Front Axle 
BAC @@By-Pass Air Control 
BACV @@Bypath Air Control Valve 
BANK1 @@Injector Bank #1 
BANK2 @@Injector Bank #2 
BANK3 @@Injector Bank #3 
BAP @@Barometric Absolute Pressure 
Bap Sens @@Barometric Absolute Pressure Sensor 
BARO @@Barometric Pressure 
Baro @@Barometric 
BARO. @@Barometric 
Batt @@Battery 
BAV @@Bleed Air Valve 
BB @@Babbit Metal 
BBDC @@Before Bottom Dead Center 
BBL. @@Barrel 
BBS @@Building Block System 
BC @@Befor Control 
BCC @@Battery Charger Control 
BCDD @@Booster Control Decelerate Device 
BCM @@Body Control Module 
BCV @@Boost Control Valve 
BCV @@Booster Control Valve 
BCV @@Boost Control Valve 
BCV @@Boost Control Valve 
BDC @@Bottom Dead Center 
BDV @@Breakdown Voltage 
BE @@Banchelor of Engineering 
BE @@Baume 
BE @@Booster Engine 
BE @@Best Economy 
BEI @@Breakerless Electronic Ignition 
BESA @@British Engineering Standard Association 
BFC @@Brake Force Coefficient 
BFLI @@Brake Fluid Level Indicator 
BHP @@Brake Horsepower 
BHS @@Bimetal Heat Sensor 
Bi Met @@BiMetallic Air Temperature Control Sensor 
BICERI @@British Internal Combustion Engine Research Institute 
BIT @@Best Injection Timing 
BK @@Brake Switch 
Bk @@Back 
Bk @@Rest Back Rest 
BLK @@Black 
BLR @@Blower 
BLR @@Beyond Local Repair 
Blst @@Ballast 
BLU @@Blue 
Blwr @@Blower 
BM @@Bench Mark 
BM @@Breakdown Maintenance 
BM @@Breake Electromagnet 
BM @@Brakdown Maintenance 
BMAP @@Barometric and Mainfold Absolute Pressure 
BMEP @@Brake Mean Effective Perssure 
BNH @@Burnish 
BOC @@Buick, Oldsmobile, Cadillac Group 
BOO @@Brake On-Off Switch 
BP @@Back Pressure 
BP @@Barometric Pressure 
BP @@Boiling Point 
BP @@Best Power 
BPA @@Bypass Air 
BPC @@Back Pressure Control 
BPO @@Bypass Orifice 
BPS @@Barometric Pressure Sensor 
BPT @@Backpressure Transducer 
BPV @@By-Pass Valve 
Br @@Bromine 
Br @@Brass 
Brkr @@Breaker 
BRN @@Brown 
BS @@Barometric Switch 
BS @@Bimetal Sensor 
BS @@Bachelor of Science 
BS @@Binary Scale 
BS @@Both Sides 
BS @@British Standards 
BSAU @@British Standards Automotive 
BSC ENG @@Bachlor of Science in Engineering 
BSFC @@Brake Specific Fuel Consumption 
BSI @@British Standards Institute 
BTC @@British Technical Council of the Motor and Petroleum Industries 
BTDC @@Before Top Dead Center 
BTHE @@Brake Thermal Efficiency 
BTRY @@Battery 
BTU @@British Thermal Units 
BTV @@Below the Throttle Valve 
BUDC @@Bofore Upper Dead Centre 
BULKHD. @@Bulkhead 
Buz @@Buzzer 
BV @@Bowl Vent Port 
BV @@Breakdowm Voltage 
BV @@Balanced Voltage 
BVSV @@Bimetallic Vacuum Switching Valve 
BVT @@BackPressure Variable Transducer 
BVV @@Bowl Vent Valve 
BYP @@Bypass 
BYPA @@Bypass Air (Idle Speed Control) 
C @@Celcius 
C @@C-Piller 
C @@Call 
C @@Candle 
C @@Capacitance 
C @@Car 
C @@Carbon 
C @@Cathode 
C @@Celsius Scale 
C @@Coulomb 
C @@* Celcius 
C&M @@Care and Maintenance 
C-4 @@Computer Controlled Catalytic Converter 
C. CANI @@Charcoal Canister 
C.E. @@Check Engine 
C.G. @@Center of Gravity 
C/O @@Checkout 
C/O @@Choke Openner 
C3I @@Computer Controlled Coil Ignition 
C4 @@Computer Controled Catalytic Converter 
CA @@Calcium 
CA @@Compressed Air 
CA @@Crank Angle 
CABR @@Cabriolet 
CAC @@Charge Air Cooler 
CACS @@Comprehensive Automobile Control System 
CACV @@Combined Air Control Valve 
CAD @@Computer-Aided Design 
CAE @@Computer Aided Enginering 
CAFE @@Corporate Average Fuel Economy 
CAL @@Calorie 
CAL @@Calculated Average Life 
CAL @@Caliber 
CAL @@Calibrate 
CAL @@Collision Avoidance Light 
CAL-PAC @@Calibration Package 
Calib @@Calibration 
Calif @@California 
Calif @@California 
CALSEL @@Calibration Select 
CAM @@Camber 
CAM @@Camshaft 
CAM @@Computer Aided Manufacturing 
Can @@Canaba 
Can @@Canister 
Can Prg @@Canister Purge 
Can.Prg @@Canister Purge 
Canc. @@Cancel 
CanCV @@Canister Control Valve 
CANP @@Canister Purge solenoid 
CANP @@Canister Purge 
CAP @@Capacity *
CAP @@Cleaner Air Package 
Cap @@Capacitor or Capacity 
CARB @@California Air Resources Board 
Carb @@Carburetor 
CAS @@Caster 
CAS @@Clear Air System 
CAT @@Carburetor Air Temperature 
CAT @@Catalogue 
CAT @@Catalyst 
CAT @@Category 
CAT @@Carburator Air Temproture 
Cat @@Catalytic Converter 
CAV @@Construction Assistance Vehicle 
CAV @@Coasting Air Valve 
CB @@Circuit Breaker 
CB @@Choke Breaker 
CB @@Contact Breaker 
CBE @@Cab Behind Engine 
CBVV @@Carburetor Bowl Vent Valve 
CC @@Cubic Centimeters 
CC @@Cruise Control 
CC @@Catalytic Converter 
CC @@Converter Clutch 
CCC @@Computer Command Control 
CCCS @@Computer Controlled Cooling System 
CCD @@Computer Control Dwell 
CCEGR @@Coolant Controlled Exhaust Gas Recirculation 
CCEVS @@Coolant Control Engine Vacuum Switch 
CCEVV @@Coolant Control Engine Vacuum Valve 
CCIV @@Coolant Control Idle Enrichment Valve 
CCM @@Central Control Module 
CCO @@Catalytic Converter for Oxidation 
CCOT @@Cycling Clutch Orifice Tube 
CCOT @@Cycling Clutch (Orifice) Turbo 
CCP @@Controlled Canister Purge 
CCP @@Charcoal Canister Purge 
CCR @@Catalytic Converter Reduction 
CCRM @@Constant Control Relay Module 
CCRO @@Catalytic Converter for Reduction and Oxidation 
CCRO @@Catalytic Converter Rhodium 
CCS @@Controlled Combustion System 
CCU @@Cruise Control Unit 
CCW @@Counterclockwise 
CD @@Computer Aided Design 
CD @@Candera 
CD @@Capacity Discharge (electronic ignition) 
CD @@Compact Disc 
CD @@Capacitor Discharge(ignition) 
CD @@Cofficient of Drag 
CD-REGVLV @@Crankcase Depression Regulator Valve 
CD-ROM @@Compact Disc Read Only Memory CD 
CDI @@Capacitive Discharge Ignition 
CDI @@Controlled Direct Injection(system) 
CDY @@Chassis Dynamometer 
CEAB @@Cold Engine Air Bleed 
CEC @@Computerized Emission Control 
CEC @@Combined Emission control(Valve) 
CEC @@Computerized Engine Control 
CEC @@Coordinating European Council (standards) 
CELO @@Cold Engine Lock-Out 
CEM @@Composite Electro-Chemical Material 
CENT @@Center 
CES @@Clutch Engaged Switch 
CES @@Coasting Enricher System 
CESS @@Cold Engine Sensor Switch 
CF @@Center of Floatation 
CF @@Centrifugal Force 
CF @@Conversion Factor 
CF @@Cutting Fluid 
CF @@Confer 
CF @@Cubic Feet 
CF @@Counter Fire 
CFI @@Central Fuel Injection 
CFI @@Cross Fire Injection 
CFI @@Centrol Fuel Injection 
CFI @@Continuous (throttle body)Fuel Injection 
CFRP @@Carbon Fiber Reinforced Plastics 
CFS @@Coasting Fuel Cut System 
CH.O @@Choke Openner 
CHA @@Charge 
CHB @@Choke Braker 
CHG. @@Charge 
CHK @@Check 
Chk.Eng. @@Check Eigine 
CHNG @@Change 
CHO @@Choke Opener 
CHRG @@Charging 
CHT @@Cylinder Head Temperature 
CHU @@Centigrade Heat Unit 
Ch Vlv @@Check Valve 
CI @@Cubic Inches 
CI @@Compression Ignition 
CI @@Compression Ignition Engine 
CI @@Cubic Inches 
CI @@Cast Iron 
CI @@Compression Ignition 
CID @@Cubic Inch Displacement 
CID @@Cylinder Identification Sensor 
CID @@Cylinder Identification 
Cig @@Cigarette 
Cig Ltr @@Cigarette Lighter 
Circ @@Circuit 
Circ Brkr @@Circuit Breaker 
CIS @@Continuous Injection System 
CIS-E @@Continuous Injection System Electronic 
CK-VLV @@Check Valve 
CKD @@Completely Knocked Down 
CKDL-VLV @@Check Delay Valve 
CKP @@Crankshaft Position 
CKPS @@Crankshaft Position Sensor 
Ckt. @@Circuit 
CL @@Closed Loop 
CL @@Central Line 
CL @@Car Load 
CL @@Class 
CL @@Clearance 
CL @@Crane Load 
CL @@Chlorine 
CLA @@Chemilumineceut Analyzer 
CLC @@Converter Locking Clutch 
CLCC @@Closed Loop Carburetor Control 
Clch @@Clutch 
CLD,CLA  @@Chemiluminecent Detector (Analyzer) 
CLEC @@Closed Loop Emission Control 
CLK @@Clock 
CLRC @@Clearance 
Clmn. @@Coloumn 
Clmt. @@Climate 
CLR @@Clear 
CLR @@Current-Limiting Resistor 
CLS @@Closed Loop 
Clstr. @@Cluster 
CLTBI @@Closed Loop Throttle Body Injection 
CM @@Centimeter 
CM @@Center of Mass 
CM @@Control Motor 
CMET @@Coated Metal 
CMH @@Cold Mixture Heater 
CMO @@Conventional Mineral Oil 
CMP @@Camshaft Position 
CMPS @@Camshaft Position Sensor 
Cmpnstr. @@Compensator 
Cmptr. @@Computer 
CMVSS @@Canadian Motor Vehicle Safety Standard 
CN @@Change Notice 
CNCLD @@Concealed 
CNG @@Compressed Natural Gas Automobile 
CNG @@Compressed Natural Gas 
CNT @@Constant 
Cntr. @@Central or Center 
CNTRL @@Control 
Cnvnc. @@Convenience 
CO @@Carbon Monoxide 
CO @@Choke Opener 
Co-Ax. @@Co-Axial 
CO2 @@Carbon Dioxide 
COC @@Conventional Oxidation Catalyst 
COD @@Cash On Delivery 
COD @@Chemical Oxygen Demand 
COE @@Cab Over Engine 
Colng. @@Coolng 
Colnt. @@Coolant 
Comb. @@Combination 
COMP @@Compressor or Compartment 
Comp. @@Compressor 
Compens @@Compensation 
Compt. @@Compartment 
CON. ROD @@Connecting Rod 
Cond. @@Condenser 
Conn. @@Connector or Connection 
CONT @@Continued 
CONT. @@Control 
CONV @@Converter 
CONV @@Convertible 
Convs. @@Conversion 
CORP @@Corporation 
Count. @@Counter 
COV @@Control Valve 
CP @@Candera Power 
CP @@Canister Purge 
CP @@Centre of Pressure 
CP @@Crankshaft Position 
CP @@Condensation Product 
CP @@Carriage Paid 
CP @@Chemical Pure 
CP @@Circular Pitch 
CP @@Constant Pressure 
CPCV @@Canister Purge Control Valve 
CPM @@Cycles Per Minute 
CPPS @@Clutch Padel Position Switch 
CPRV @@Canister Purge Regulator Valve 
CPS @@Canister Purge Solenoid 
CPS @@Central Power Supply 
CPS @@Crank Position Sensor 
CPS @@Central Power Supply 
CPS @@Crankshaft Position Sensor 
CPS @@Cycle Per Second 
CPS @@Control Pressure System 
CPT @@Convertible Power Train 
CPU @@Central Processing Unit 
CPU @@Computer 
CPV @@Canister Purge Valve 
CPV @@Constant Pressure Valve 
CPVVV @@Choke Pulldown Vacuum Vent Valve 
CR @@Crossroad 
CR @@Contraction Ratio 
CRE @@Corrosion Resistant 
CRES @@Corrosion Resistant Steel 
CRK @@Cranking Signal 
Crnr. @@Corner 
CRNRNG @@Cornering 
CRO @@Cathode-Ray Oscilloscope 
CRS @@Choke Return System 
CRS @@Child Restraint System 
CRS @@Coasting Richer System 
CRS @@Coolant Recovery System 
CRT @@Cathode Ray Tube 
CRTC @@Cathode Ray Tube Controller 
CRV @@Coasting Richer Valve 
CSA @@Cold Start Advance 
CSC @@Coolant Spak Conrol 
CSCS @@Cold Start Control Solenoid 
CSD @@Constant Speed Drive 
CSE GND @@Case Ground 
CSPM @@Cold Start Program Modifier 
CSS @@Calibration Select Switch 
CSSA @@Cold Start Spark Advance 
CSSH @@Cold Start Spark Advance Hold(system) (
CSU @@Crank Angle Selecting Unit 
CT @@Cold Temperature 
CT @@Conventional Thermactor 
CT @@Cam-Train 
CT @@Closed Throttle 
CTA @@Computer-Aided Test 
CTA @@Constant Temperatuer Hot Wire Anemometer 
CTAV @@Cold Temperature Actuated Vacuum 
CTD @@Contrlolled Traction Differential 
CTO @@Coolant Temperature Override 
CTPS @@Closed Throttle Position Switch 
CTR @@Critical Temperature Resistance 
Ctrl. @@Control 
Ctrlld @@Controlled 
CTS @@Coolant Temperature Sensor 
CTS @@Coolant Temperature Switch 
CTSWH @@Closed Throttle Switch 
CTSY @@Courtesy 
CTSY. @@Courtesy 
CTTS @@Coolant Temperature Thermo Switch 
CTVS @@Choke Thermal Vacuum Switch 
CU @@Control unit 
Cu.In. @@Cubic Inches 
CUB @@Cubic 
CURR @@Current 
CV @@Constant Velocity 
CV @@Check Valve 
CV @@Check Valve 
CV @@Coasting Valve 
CV @@Constant Velocity 
CV @@Constant Velocity Joint 
CV @@Control Valve 
CV @@Calorific Valve 
CV @@Combat Vehicle 
CV @@Commercial Vehicle 
CV @@Convertible 
CV @@Constant Volume Specific Heat 
CV @@Critical Viscosity 
CVC @@Constant Vacuum Control 
CVC @@Constant Voltage Control 
CVCC @@Compound Vertex Controlled Combussion 
CVCC @@Constant Volume Combustion Chamber 
CVRT @@Continuously Variable Ratio Transmission 
CVS @@Constant Volume Sampling 
CVS3P @@Cold Vacuum Spark,3-Port 
CVSCC @@Coolant Vacuum Switch Cold Closed 
CVSCO @@Coolant Vacuum Switch Cold Open 
CVT @@Contiuously Variable Transmission 
CVU @@Continuously-Variable Unit 
CW @@Clockwise 
CW @@Continuous Wave 
CY @@Copy 
CYL @@Cylinder 
CYL @@Cylindrical 
D @@Drive 
D @@Drive 
D @@*Diameter *Discharge *Drive *Dual *Double *
D&M @@Driving and Maintenance 
D/O @@Delivery Order 
Damp @@Damper 
DAR @@Drive Axle Ratio 
DAS @@Distributor Advance Solenoid 
DASS @@Diesel Additive Supply System 
DATA+ @@Data Positive 
DATA- @@Data Negative 
DB @@Decibel 
DBC @@Dual Bed Catalytic 
DBP @@Drawbar Pull 
DBW @@Drive-by-Wire 
DC @@Direct Current 
DC @@Digital Control 
DC @@Drop Center Rim 
DC @@Dead Center 
DCEL @@Direct Current Luminescence 
DCH @@Dual-Circuit Hydraulic System 
DCI @@Direct Cylinder Injection 
DCL @@Data Communications Link 
DCLV @@Deceleration Valve 
DCM @@Direct Current Motor 
DCM/C-VLV @@Deceleration Mixture Control Valve 
DCS @@Deceleration Control System 
DCTO @@Dual Coolant Temperature Override 
DCV @@Deceleration Control Valve 
DCV @@Downdraft Constant Vacuum Carburettor 
DD @@Dual Distributors 
DD @@Direct Drive 
DDC @@Direct Digital Control 
DDD @@Dual Diaphragm Distributor 
DDV @@Distributor Decel Valve 
De-Ice @@De-Icer 
De-ice. @@De-Ice 
DEC @@Digital Engine Control 
Decel @@Deceleration 
DECS @@Daihatsu Economical Clean-Up System (
DEE @@Digital Engine Electronic 
DEF @@Defroster 
DEF @@Diesel Exhaust Filter 
Def @@Defroster 
DEF. @@Defogger or Defroster 
DEFI @@Digital Electronic Fuel Injection 
Defog @@Defogger 
Deg @@Degree 
Del @@Delay 
DELO @@Diesel Engine Lubricating Oil 
DERM @@Diagnostic Energy Reserve Module 
Desig @@Designation 
DET @@Detached 
DET @@Detail 
DET @@Detection 
DET @@Dtector 
Deton. @@Detonation 
DETRNT. @@Deterrent 
DF @@Design formula 
DF @@Direction Finding 
DF @@Defogging 
DF @@Drive Fit 
DFF @@Direct Fuel Feed(injector) 
DFI @@Digital Fuel Injection 
DFIP/D @@Diesel Distribution-Type Fuel Injection Pump 
Dft @@Defeat 
DG @@Double Glass 
DG @@Double Groove 
DI @@Deceleration Idle 
DI @@Direct Injection 
DI @@Defense Industry 
DI @@Deicing 
DI @@Direction Indicator 
DI @@Diesel Index 
DI.B @@Disk Brake 
Diag @@Diagnostic 
DIC @@Driver Information Center 
DIDV @@Dual Ignition Delay Valve 
Diff @@Differential 
Dig. @@Digital 
DIGRO @@Digital Readout 
Dim @@Dimmer 
DIN @@Deutsch Industrial 
Dir @@Direction or Directional 
DIRSI @@Deposit Induced Runaway Surface Ignition 
DIS @@Direct Ignition System 
DIS @@Discharge 
DIS @@Distribution Ignition System 
DIS @@Doppler Inertial System 
DIS @@Digital Idling Stabilization 
DIS @@Distributorless Ignition System 
DIS @@Dual Induction System 
Disp @@Display 
DIST @@Distribution 
DIST @@Distributor 
DIT @@Direct Injection Turbocharged 
DITA @@Direct Injection Turbocharged Aftercooled 
DIX. @@Deluxe 
DIY @@Do-It-Yourself 
DK BLU @@Dark Blue 
DK GRN @@Dark Green 
DL @@Datum Level 
DL @@Dead Load 
DL @@Drawing List 
DLC @@Data Link Connector 
DLI @@Distributorless Ignition 
DLL @@Design Limit Load 
DLR @@Driving Lamps Relay 
DLS @@Digital Idling Stabilization(unit) 
DLV @@Deflection Limitin Volume 
Dlx @@Deluxe 
Dly @@Delay 
DM @@Diesel Moderate 
DM @@Dehydrogenated Mixture 
DM @@Design Manual 
DM @@Development Milestone 
DM @@Differential Motor 
DM @@Drive Magnet 
DME @@Digital Motor Electronics 
DMS @@Dual Manifold System 
DMS @@Distributor Modulator System 
Dn. @@Down 
Dnshft @@Downshift 
DOC @@Direct Operating Cost 
DOD @@Department of Defense  
DOHC @@Double Overhead Camshaft 
DOL @@Data Output Line 
DOT @@Department of Transportation(US) 
DP @@Dashpot 
DP @@Development Prototype 
DP @@Damp Proofing 
DP @@Data Processing 
DP @@Dead Point 
DP @@Dew Point 
DP @@Diametral Pitch 
DP. CHAMBER @@Depression Chamber 
DPA @@Delayed Port Admission(system) 
DPA @@Distributor Pump Assembly 
DPB @@Dual Power Brake 
DPC @@Data Processing Center 
DPD @@Dual Point Distributor 
DPDT @@Double-Pole Double-Throw 
DPF @@Diesel Particulate Filter 
DPI @@Dual Plug Inhibit 
DPST @@Double-Pole Single-Throw 
DPT @@Department 
DR @@Drive Range 
DR @@Double Reduction 
Dr @@Door 
DR.B @@Drum Regulation Braker 
DRB-II @@Diagnostic Readout Box 
DRCV @@Distributor Retard Control Valve 
DRL @@Daytime Running Lmps 
Drop @@Dropping 
DRS @@Distributor Retard Solenoid 
Drvr @@Driver 
DS @@Distributor Spark 
DS @@Detonation Sensor 
DS @@Diesel Severe 
DS @@Data Set 
DS @@Design Specification 
DS @@Drawing Summary 
DS-II @@Duraspark II 
DSC @@Doctor of Science 
DSCC @@Digital Spark Control Computer 
Dsl @@Diesel 
Dsl @@Diesel 
DSM @@Design Standards Manual 
Dstnc @@Distance 
DT @@Date 
DT @@Descrepancy Tag 
DT @@Doubling Time 
DT @@Double Tire 
DTC @@Diagnostic Trouble Code 
DTM @@Decel Throttle Modulator 
DTM @@Diagnostic Test Mode 
DTMS @@Diagnostic Test Mode Selector 
DTP @@Department of Transport(UK) 
DTR @@Duty Type Rating 
DTS @@Detailed Test Specification 
DTVS @@Distributor Thermal Vacuum Switch 
DV @@Decel Valve 
DV @@Delay Valve 
DV @@Diverter Valve 
DV @@Device 
DV-TW @@Delay Valve-Two Way 
DVAC @@Distributor Vacuum Advance Control Valve 
DVAS @@Distributor Vacuum Advance Solenoid 
DVB @@Delay Vacuum Bypass System 
DVCS @@Distributor Vacuum Control Switch 
DVCV @@Differential Vacuum Control Valve 
DVD @@Differential Delay Valve 
DVDSV @@Differential Vacuum Delay Separator Valve 
DVDV @@Distributor Vacuum Delay Valve 
DVIDV @@Differential Valve/Delay Valve 
DVM @@Digital Voltmeter 
DVOM @@Digital Volt/Ohm Meter 
DVRV @@Distributor Vacuum Regulating Valve 
DVTR-VLV @@Diverter Valve 
DVTW @@Delay Valve Two-Way 
DVVV @@Distributor Vacuum Vent Valve 
DWC @@Deadweight Capacity 
DWDRG @@Double-Weight Dual Range Governor 
DWLS @@Double Weight Limiting Speed(governor) 
DWS @@Differential Wheel Speed 
DWT @@Deadweight Tonnage 
DX @@Deluxe (=luxurious) 
DX @@Distance 
DX @@Duplex 
DX @@Deluxe 
DYN @@Dynamotor 
DZ @@Dozen 
E @@*Exhaust *Electronmotive Force *Earth *Empty
E @@Earth 
E @@East 
E @@Electric Field Intensity 
E @@Electric Tension 
E @@Emergency 
E @@Modulus of Elasticity 
E& FR @@Event and Failure Record 
E.M.F @@Electromotive Force 
EA @@Energy Absorbent Bumper 
EA @@Earth 
EA @@Energy Absorbing 
EA @@Energy Absorber 
EAC @@Electronic Air Control 
EAC @@Electric Assist Choke 
EAC @@Engine Air Control 
EAD @@Energy Absorbing Devicer 
EAI @@Exhaust Air Induce 
EAICV @@Exhaust Air Induce Control Valve 
EAIR @@Electronic Air Management 
EAP @@Electronic Air Pump 
EAS @@Electric Air Switching 
EAS @@Electronic Spark Advance 
EAS @@Electronic Air Suspension 
EAT @@Electronic Automatic Transmission 
EATC @@Electronic Automatic Temperature Control 
EAU @@Energy Absorbing Unit 
EAVS @@Electrically Actuated Vacuum Switch 
EB @@*Emergency Brake *Exhaust Brake *
EBCM @@Electronic Brake Control Module 
EBCV @@Electric Air Bleed Control Valve 
EBCV @@Electric Air Bleed Control Valve 
EBP @@Exhaust Back Pressure 
EBR @@Electron Beam Recording System 
EBS @@Electron Beam Scanning System 
EC @@Electric Choke 
EC @@Emission Controlled Module 
EC @@Elasticity Coefficient 
EC @@Electronic Computer 
EC @@Error Correcting 
EC @@Exhaust Valve Closes 
EC BRAKE @@Energy Consumption Brake 
EC-AT @@Electronic Controlled Automatic Transmission 
ECA @@Electronic Control Assembly 
ECC @@Electronic Chassis Control 
ECC @@Electronic Climate Control 
ECC @@Electronic Computer Control 
ECC @@Electronic Controlled Carburetor 
ECC @@Electronic Climate Control 
ECC @@Electronic Comfort Control 
ECC @@Electronic Control Carburator 
ECC @@Ecentric 
ECC @@Electronically Controlled Clutch(system) 
ECC @@Expansion Combustion Chamber 
ECC @@Electronically Controlled Carburetor Control Unit 
ECCS @@Electronic Concentrated Control System 
ECCS @@Electronic Concentrated Engine Control System 
ECD @@Electronic Controlled Diesel 
ECD @@Energy Conversion Device 
ECD @@Estimated Completion Date 
ECDY @@Eddy Current Dynamometer 
ECE @@External Combustion Engine 
ECGI @@Electronically Controlled Gasoline Injection 
ECI @@Electronic Controlled Ignition 
ECI @@Electronic Controlled Injection 
ECI-JET @@Electronic Controlled Injection Jet 
ECI-TURBO @@Electronic Controlled Injection Turbo 
ECL @@Equipment Component List 
ECM @@Electronic Control Module 
ECM @@Engine Control Module 
ECO @@Engine Checkout System 
ECO @@Engineering Change Order 
Econ @@Economy 
ECON. @@Engine Control Module 
ECR @@Equivalent Continuous Rating 
ECRV @@Emission Control Regulator Valve 
ECS @@Emission Control System 
ECS @@Electronic Control Suspension 
ECS @@Electronic Control Power Steering 
ECS @@Error Correction Servo 
ECS @@Evaporaative (emission) Control System 
ECS @@Engineering Change Schedule 
ECS @@Eenvironmental Control System 
ECS @@Electronic Control System 
ECS @@Engine Control System 
ECT @@Electronic Control Transmission 
ECT @@Engine Coolant Temperature 
ECT @@Electronic Controlled Transmission 
ECT @@Engine Coolant Temperature 
ECT @@Engine Cutoff Timer 
ECT @@Electronic Controlled Transmission 
ECT-I @@Electronic Controlled Transmission Intelligent 
ECU @@Electronic Control Unit 
ECU @@Engine Control Unit 
ECU @@Engine Calibration Unit 
ECVT @@Electronic Continuously Variable Transmission 
ED @@Electron Device 
ED @@Error Detecting 
ED @@Estimated Date 
ED @@Experimental Duties 
EDAC @@Engine Data Acquisition and Control(system) 
EDC @@Engineering Design Change 
EDC @@Engineering Drawing Change 
EDC @@Estimated Date of Completion 
EDC @@(Bosch*s)Electronic Diesel Control
EDD @@End Delivery Date 
EDD @@Engineering Design Date 
EDD @@Estimated Delivery Date 
EDF @@Electro Drive Fan 
EDF @@Electric Drive Fan Relay Assembly 
EDF @@Electronic Dual Fuel Cut 
EDIC @@Electronic Diesel Injection Control (system) 
EDIS @@Electronic Distributorless Ignition System 
EDM @@Electronic Distributor Modulator 
EDP(S) @@Electronic Data Processing (system) 
EDPAC @@Engine Diagnostic Package 
EDPM @@Electronic Data Processing Machine 
EE @@Electrical Engineering 
EE @@Electronics Engineer 
EEC @@Electronic Engine Control 
EEC @@Evaporative Emission Control 
EEC @@European Economic Community (Common Market) 
EEC @@Engine Eletronic Center 
EEC II @@Electronic Engine Controls II 
EECS @@Evaporative Emissions Control System 
EEG @@Electronic Ephalogram(-graphy) 
EEV @@Energy Efficient Vehicle 
EF @@Emergency Facilities 
EF @@Equivalent Focal Length 
EF @@Exhaust Fan 
EFC @@Electronic Fuel Control 
EFC @@Electronic Feed-Back Carburator 
EFC @@Electronic Fuel Control (system) 
EFE @@Early Fuel Evaporator 
EFE @@Early Fuel Evaporation System 
EFE @@Early Fuel Evaporation 
EFES @@Early Fuel Evaporation System 
EFG @@Electronic Fuel Gauge 
EFI @@Electronic Fuel Injection 
EFM @@Electronic Fuel Management
EFM @@Electronic Fuel Metering 
EG @@Ethylene Glycol 
EGC @@Exhaust Gas Check Valve 
EGI @@Electronic Control Gasoline Injection 
EGI @@Electronic Gasoline Injection 
EGI @@Electronic Gasoline Injection 
EGO @@Exhaust Gas Oxygen 
EGO @@Exhaust Gas Oxygen(sensor) 
EGO Sens Gnd  @@EGO Sensor Ground 
EGO2 @@Exhaust Gas Oxygen(dual) 
EGOR @@Exhaust Gas Oxygen Signal Return 
EGR @@Exhaust Gas Recirculation 
EGR TEMP SEN EGR @@Temperature Sensor
EGR-Blds @@EGR Bleed Solenoid
EGR-CLR @@EGR Cooler 
EGR-CTS @@EGR Charge Temperature Sensor 
EGR-DV @@EGR Delay Valve 
EGR-EPV @@EGR External Pressure Valve
EGR-EVR @@EGR Electronic Vacuum Regulator
EGR-RSR @@EGR Reservoir 
EGR-SO @@Exhaust Gas Recirculation Shutoff 
EGR-VA @@EGR Valve Actuator 
EGR-VM @@EGR-Vacuum Modulator 
EGR-VM @@Exhaust Gas Recirculation Vacuum Modulator 
EGR-VSOL @@EGR Vacuum Solenoid 
EGR-VVA @@EGR Venturi Vacuum Amplifier 
EGR/EPR @@Exahaust Gas Recirculation/Exhaust Pressure Regulation 
EGRC @@EGR Control Solenoid 
EGRC @@EGR Control 
EGRC @@EGR Cooler 
EGRC @@Exhaust Gas Recirculation Control 
EGRC SOL/V @@EGR Canister Control Solenoid Valve EGR/
EGRT @@EGR Temperature 
EGRV @@EGR Vent Solenoid 
EGRV @@EGR Vent  
EGRV @@EGR-Valve  
EGRV @@Exhaust Gas Recirculation Vent 
EGRV @@Exhaust Gas Recirculation Valve 
EGS @@Electronic Transmission Control 
EGT @@Exhaust Gas Temperature 
EH @@Electronic Heating 
EHC @@Electronic Hight Control 
EHC @@Exhaust Heat Control 
EHC @@Electr-Hydraulic Controller 
EHF @@Extremely High Frequency 
EHP @@Effective Horsepower 
EHPS @@Electro Hydraulic Power Steering (
EI @@Electronic Ignition 
EIC @@Carbon Emission Index 
EICV @@Electronic Idle Control Valve 
EIHC @@HC Emissions Index 
EIN @@Engine Identification Number 
EIS @@Electronic Ignition System 
EITS @@Excessive Idle Termination System 
EITV @@Early Intake-Valve Closing (system) 
EIV @@Emissions Index for Volatile 
EL @@Elastic Limit 
EL @@Electroluminescent 
ELB @@Electronic Lean Burn 
ELC @@Electronic Level Control 
ELC @@Electric Control 
ELC @@Electronic Lock-Up Clutch 
ELEC @@Electronic Valve 
Elec. @@Electric 
Elec. @@Electronic 
Elect @@Electronics 
ELR @@Emergency Locking Retractor 
ELS @@Electronic Levelling Suspension 
ELS @@Electronic Suspension Levelling System 
EM @@Engine Modification 
EM @@Electron Microscope 
EM @@Electromagnetic 
EM @@Electromechnical 
EM @@Engineering Manual 
EM @@Engine Modification 
EMA @@Emission Measurement Apparatus 
EMA @@Engine Maintenance Area 
EMB @@Engine Mangement Bumper 
EMC @@Electromagnetic Compatibility 
EMC @@Electronic Motor Control (module) 
EMD @@Electric Motor Driven 
EMF @@Electronmotive Force 
EMI @@Electromagnetic Interference 
Emis @@Emission 
EML @@Electronic Throttle Control 
EML @@Equipment Modification List 
EMP @@Empty 
EMR @@Electronic Module Retard 
EMU @@Electromagnetic Unit 
ENG @@Engineer 
ENG @@Engineering 
Eng @@Engine 
Eng @@Coolant Temp Engine Coolant Temperature Sensor 
ENN D @@Doctor of Engineering 
EO @@Engine Oil 
EO @@Engineering Order 
EO @@Exhauxt Valve Opens 
EOG @@Electro-Oculography 
EOHC @@Engine-Out Hydrocarbon 
EOI @@End of Injection 
EOI @@Exhaust Over Inlet(valves) 
EOL @@End of Life 
EON @@Engine Octane Number 
EOS @@Exhaust Oxygen Sensor 
EP @@Extreme Pressure 
EP @@Earth Plate 
EP @@Electrically Polarized 
EP @@Electrical Propulsion 
EP @@Electropneumatic 
EP @@End Point 
EP @@Engineering Project 
EPA @@Environmental Protection Agency 
EPC @@Electronic Pressure Control 
EPCS @@Electronic Propulsion Control System 
EPGS @@Electrical Power Generating System 
EPI @@Electronic Petrol Injection 
EPIC @@Exhaust Port Ignition Cleaner 
EPOS @@EGR Valve Position 
EPR @@Exhaust Pressure Regulator 
EPR @@Engine Pressure Ratio 
EPR @@Engine Pressure Regulator 
EPR @@Exhaust Pressure Ratio 
EPR @@Exhaust Pressure Regulation 
EPS @@Electronic Power Steering 
EPS @@Electric Powerstorage 
EPS @@Electrical Power Supply 
EPS @@Emergency Power Supply 
EPT @@EGR Pressure Transducer
EQ @@Equal 
EQ @@Equivalent 
EQ @@Equipment 
ER @@EGR Rate 
ER @@Emission Ratio 
ERGS @@Electronic Route Guidance System 
ERS @@Economy Running System 
ESA @@Electronic Spark Advance 
ESC @@Electronic Spark Control 
ESC @@Electronic Skid Control 
ESC @@Electronic Suspension System 
ESC @@Electronic Spark Control 
ESC @@Engine Spark Control Igniter
ESC-IGN @@Engine Spark Control Igniter 
ESD @@Electrostatic Discharge 
ESG @@Engine Speed Governor 
ESM @@Engineering Standards Manual 
ESS @@Electronic Spark Selection 
ESS @@Engine Speed Sensor 
ESS @@Electronic Switching System 
ESSM @@Engine Speed Switch Module 
EST @@Electronic Spark Timing 
EST @@Electronic Programmed Spark Timing 
ESU @@Electrostatic Unit 
ESV @@Experiment Safety Vehicle 
ET @@Exhaust Temperature 
ETA @@Estimated Time of Arrival 
ETC @@Electronic Throttle Control 
ETC @@Electronic Temperature Control 
ETC @@Electronic Traction Control System 
ETC @@Estimated Time of Completion 
ETC @@Electronic Throttle Control 
ETCC @@Electronic Touch Comfort Control 
ETEC @@Electronic Truck Engine Control 
ETF @@Engine Test Facilities 
ETF @@Engineering Test Facilities 
ETP @@Evaluation Test Procedure 
ETR @@Emergency Tensioning Retractor 
ETR @@Electronically Tuned Receiver 
ETRTO @@European Tyre and Rim Technical Organization 
ETS @@Engine Temperature Switch 
ETS @@Evaluation Test Specifications 
ETS @@Exhaust-Gas-Turbo-Super-Charger 
ETV @@Electronic Throttle Valve 
EU @@Energy Unit 
EU @@Entropy Unit 
EU @@Equivalent Unit 
EUV @@Extreme Ultraviolet Radiation 
EV @@Electro Vacuum 
EV @@Electron Volt 
EV @@Electric Vehicle 
EVAP @@Evaporative System 
Evap. @@Evaporator or Evaporative 
EVC @@Exhaust Valve Closing 
EVCR @@Emission Vacuum Control Regulator 
EVE @@Electro-Vacuum EGR 
EVIC @@Electronic Vehicle Information Center 
EVO @@Exhaust Valve Opening 
EVP @@EGR Valve Position 
EVP @@EGR Valve Position (sensor) 
EVR @@EGR Valve Regulator 
EVR @@EGR Vacuum Regulator  
EVR @@Electro-Vacuum Relay 
EVR @@Electronic Vacuum Regulator 
EVR @@Rlectronic Voltage Regulator 
EVRV @@Electronic Vacuum Regulator Valve 
EVS @@Economy Vacuum Switch 
EVSA @@Electronic Variable Shock Absorber 
EWD @@Rear Wheel Drive 
EX @@Exhaust 
EX @@Examined 
EX @@Excess 
EX @@Exciter 
EX @@Expanding 
EX @@For Example 
EXC @@Exhaust Close 
Exc. @@Except 
Exch @@Exchange 
EXH @@Exhibition 
Exh @@Exhaust 
EXH V  @@Exhaust Valve 
EXO @@Exhaust Open 
EXT @@Extend, Extension 
EXT @@Exterior, External 
EXT @@Extra 
EXT @@Extinguisher 
Ext @@Exterior 
EXT W @@Extension Wire 
EXV @@Exhaust Valve 
F @@Fahrenheit 
F @@*Front *Fiele *Force *Farad *Full *Finish *Fine *
F/A @@Fuel-Air Ratio 
F/B @@Feedback 
F/B @@Fuse Block 
F/F @@Front Engine/Front Wheel Drive 
F/Rly @@Pnl Fuse/Relay Panel 
FA @@Failure Analysis 
FA @@First Aid 
FA @@Fuel Additives 
FAC @@Force-Air Cooling 
FACS @@Full Auto Choke system 
FAI @@Fresh Air Intake 
FAT @@Factory Acceptance Test 
FB @@Feed Back Carburetor Control 
FB @@Fuel Bck-Up 
FB @@Feedback 
FB @@Fire Brigade 
FB @@Feight Bill 
FBC @@Feedback Carburetor 
FBP @@Final Boiling Point 
FC @@Electro-Drive Fan 
FC @@Fan Control 
FC @@Fuel Cut 
FC @@Fuel Cutout 
FC @@Fuel Consumption 
FCC @@Facilities Control Consol 
FCC @@Fluidized Catalytic Cracker 
FCGA @@Facility Gauge 
FCO @@Fuel Cut-Off 
FCS @@Fuel Control System 
FCS @@Fuel Cut Solenoid Valve 
FCT @@Fan Control Temperature 
FCU @@Fuel Control Unit 
FCV @@Fuel Cut Valve 
FCV @@Fuel Cutout Valve 
FD @@Face of Drawing 
FD @@Forced Draft 
FD @@Frequency Doubler 
FD @@Function Devices 
FDC @@Fuel Deceleration Control 
FDN @@Foundation 
FDV @@Forward Delay Valve 
FDV @@Fuel Decel Valve 
FE @@For Example 
FE/RD @@Front Engine/Rear Drive 
Fed @@Federal 
FEM @@Fuel Economy Meter 
FEM @@Finite Element Method 
FES @@Fuel Evaporation System 
FES @@Flash Evaporator System 
FET @@Field Effect Transistor 
FF @@Front Engine Front Drive 
FF @@Fixed Fee 
FF @@Flip-Flop 
FF @@Fuel Flow 
FF @@Full Figure 
FFB @@Fuel Feed Back 
FFCS @@Fuel Flow Control System 
FFOT @@Ford Fixed Orifice Tube 
FFT @@Fast Foourier Transform 
FGS @@First Gear Switch 
FI @@For Instance 
FI @@Fuel Injection 
FIA @@Fast Idle Actuator 
FIA @@Federation Iternational Auomobile 
FIAC @@Fast Idle Air Cylinder 
FIAT @@Fabbrica Italiana Automobile Torino (
FIC @@Fast Idle Cam 
FICD @@Fuel Injection Control Device 
FICD @@Fast Idle Control Device 
FID @@Fast Idle Device 
FID @@Flame Ionization Detecter 
FIE @@Fuel Injection Equipment 
FIO @@For Information Only 
FIO @@Free In and Out 
FIP @@Fuel Injection Pump 
FIPL @@Fuel Injector Pump Lever 
FIPO @@Fast Idle Pull Off 
FIPOT @@Fast Idle Dashpot 
FIPS @@Fluorescent Indicator Panels 
FIR @@Facility Installation Review 
FIR @@Facility Interference Review 
FIR @@Fuel Indicator Reading 
FIREX @@Fire Extinguisher 
FISR @@Fast Idle Solenoid Relay 
FL @@Fixed Load 
FL @@Flow Limited 
FL @@Full Load 
FLC @@Fluid Link Converter 
FLI @@Fluid Level Indicator 
FLP @@Fault Location Panel 
Flshr. @@Flasher 
FLT @@Full-Load Torque 
FLTR @@Filter 
FLU @@Fault Location Unit 
FM @@Field Magnet 
FM @@Field Manual 
FM @@Field Modification 
FM @@Frequency Modulation 
FMA @@Failure Mode Analysis 
FMEA @@Failure Mode Effects Analysis 
FMEM @@Failure Mode Effects Management 
FMR @@Fuel Metering Rod 
FMVSS @@Federal Motor Vehicle Safety Standard 
FNP @@Fusion Point 
Fnt @@Front 
Fnt WD @@Front Wheel Drive 
FO @@Fast Operating Relay 
FO @@Firing Order 
FO @@Fuel Oil 
FOR @@Fuel Oil Return 
FOR @@Free On Rail 
FOR @@Fuel Oil Return 
FP @@Fuel Pump 
FP @@Fuel Pump Relay 
FP @@Friction Power 
FP @@Feed Pump 
FP @@Flash Point 
FP @@Fire Proof 
FP @@Foot-Pound 
FP @@Freezing Point 
FP @@Film and Paper Condenser 
FP @@Finished Pieces 
FP @@Fire Plug 
FP @@Fixed Price 
FP @@Fully Paid 
FPC @@Fuel Pump Controller 
FPM @@Fuel Pump Monitor 
FPR @@Fuel Pressure Regulator 
FPRC @@Fuel Pressure Regulator Control 
FPRVSV @@Fuel Pressure Regulator Vacuum 
G @@Grams 
G @@Center of Gravity 
G @@Generator 
G @@Ground 
G @@Acceleration of Gravity 
G @@Gas 
G @@General 
GA @@General Arrangement 
GA @@General Average 
Ga @@Gauge 
GAL @@Gallon 
GAL @@Galileo 
GAS.F @@Gas Filter 
GAWR @@Gross Axle Weight Rating (US) 
GAWR @@Gross Axle Weight Rear 
GC @@Gravity Center 
GC @@Gas Chromatography 
GCM @@Covernor Control Module 
GCU @@Generator Control Unit 
GCW @@Gross Combination Weight (US) 
GDS @@Goods 
GE @@Glaenzer External Joint 
Gen @@Generator 
GFRP @@Glass Fiber Reinforced Plastics 
GG @@Gas Generator 
GI @@Glaenzer Inboard Joint 
GL @@Grand Luxurious 
GM @@Gram 
GM @@General Manager 
GM @@General Motors Corporation
GM @@Governor Motor 
GM @@Metacentric Height
GM @@Geometric Mean 
GM @@Greenwich Meridian 
GM @@Guided Missile 
GMC @@General Motors Corporation
GMCVT @@General Motor*Continuously Variable Transmision 
Gnd @@Ground 
Gov @@Governor 
GP @@General Purpose 
GP @@Geometric Progression 
GP @@Gear Ratio 
GPHM @@Gallons Per Hundred Miles 
GPM @@Gallons Per Minute 
GPS @@Global Positioning System 
GR AB @@Grade Ability 
GRN @@Green 
GRY @@Gray 
GS @@Grand Sporty 
GSC @@Governor Speed Converter 
GSS @@Gear Select Switch 
GSS @@Grand Sporty Sedan 
GT @@Grand Touring Car 
GT @@Gas Turbine 
GT @@Grand Touring Car 
GTW @@Gross Train Weight 
GTW @@Gross Trailer Weight 
GVW @@Gross Vehicle Weight 
GVWR @@Gross Vehicle Weight Rating 
GVWR @@Gross Vehicle Weight Rear 
GW @@Gross Weight 
GW @@Guided Weapon 
H @@*High Speed *Hight *Hour *Head *Heavy *Heavy *Hot *Henry *
H @@Hardness 
H @@Head 
H @@Height 
H @@Henry 
H @@Hour 
H @@Hydrogen 
H @@Magnetic Field Intensity 
H.D. @@High Density 
H/D @@Headlight 
H/D @@Heavy Duty 
H/D @@Heater/Defroster 
HA @@Hectare 
HA @@High Altitude 
HA @@High Amplitude 
HAC @@High Altitude Compensator 
HAC S/W @@High Altitued Compensation Switch 
HACV @@Hot Air Control Valve 
HADV @@Heated Air Delay Valve 
HAI @@Heated Air Intake 
Harn @@Harness 
HAS @@High Altitude System 
HATSV @@Heated Air Temperature Sensing Valve 
Haz @@Hazard 
HBV @@Heater Blower Voltage 
HC @@Hydrocarbons 
HCV @@Heat Control Valve 
HCV @@Hot Control Valve 
HD @@Heavy Duty 
HDAC @@Heater, Defroster, Air Conditioning Assembly 
HDC @@Heavy Duty Cooling 
HDL @@Headlamp 
HDPE @@High-Density Polyethylene 
HDT @@Heavy Duty Truck 
HDT @@Heat Distortion 
HDT @@Heat Distortion Temperature 
HEA @@Heater Evaporator Assembly 
Head Lt@@Headlight 
HEDF @@High Speed Electro-Drive Fan 
HEF @@High-Energy Fuels 
HEGO @@Heated Exhaust Gas Oxygen Sensor 
HEI @@High Energy Ignition 
HELP @@High-Energy Level Pneumatic Bumper 
HEXCH @@Heat Exchanger 
HF @@High Frequency 
HFC @@High Speed Electro-Drive Fan 
HFP @@High Fuel Pump 
Hgt @@Height 
HGV @@Heavy Goods Vehicle 
HHV @@High Heating value 
HI @@High Beam 
Hi @@High 
HI ALT @@High Altitude 
HI ALT @@High Altitude 
HI-FI @@High Fidelity 
HI-Q @@High Quality Factor 
Hi-Spd @@High Speed 
HIC @@Hot Idle Compensator 
HIC @@High Intensity Discharge Headlight 
HIC @@Head Injury Criterion  
HIC @@Hybrid Integrated Circuit Igniter Unit 
HL @@Head Light 
HL @@Hardening Liquid 
HL @@Horizontal Line 
HLOS @@Hardware Limited Operation Strategy 
HM @@Hydraulic Motor 
HMOS @@High-Performance Metal-Oxide-Silicon Device 
HNDL @@Handle 
HO @@High Ouput 
HOBC @@High Octane Blending Compound 
HOE @@Hydraulically Operated Equipment 
HOS2 @@Heated Exhaust Gas Oxygen Sensor 
Hot Idle Comp Vlv @@Hot Idle Compensator Valve 
HOVI @@Handbook of Overhaul Instructions 
HP @@Horse Power 
HP @@High Performance 
HP @@High Pressure 
HP @@Hydraulic Pump 
HP @@Harmonical Progression 
HP @@High Pass 
HP @@High Power 
HP @@Hip Point 
HP @@Horizontal Parallax 
HP @@Horizontal Plane 
HP @@Hot Press 
HPC @@High Pressure Chamber 
HPR @@High Penetration Resistance
HPR @@High Pressure Governor 
HPR @@Horse Power/Hour 
HPV @@Honda Progressive Valve 
HR @@Heart Rate 
Hrn. @@Horn 
HRS @@Hot Rolled Steel 
HS @@Helical Spring 
HS @@High Speed 
HSC @@High Swirl Combustion(engine) 
Hsg. @@Housing 
HSGT @@High Speed Ground Transportation 
HSI @@High Speed Input 
HSO @@High Speed Output 
HSP @@High Swirl Port 
HT @@High Temperature 
HT @@High Tension 
HT @@Oxygen Sensor Heater 
HTCC @@High-Turbulence Combustion Chamber 
HTD @@High Torque Drive 
HTR @@Heater 
HTR @@Heavy Truck 
HUCR @@Highest Useful Compression Ration 
HVAC @@Heating, Ventilation and Air Conditioning 
HVACM @@Heater-Vent-Air Conditioning Module HVAC
HVM @@Heater-Vent-Module 
HW @@Half-Wave 
HW @@Head Wind 
HW @@Herewith 
HW @@Hot Water 
HW @@Hand-Wheel Angle 
HWA @@Hot-Wire Anemometer 
HWFET @@Highway Fuel Economy Test 
HWTorq @@Hand-Wheel-Torque 
HWY @@Highway 
HY.S @@Hydropneumatic Suspension 
Hyd. @@Hydraulic 
HZ @@Hertz 
I @@*Intension *Intermediate *
I-LE @@In-Line Engine 
I-TEC @@Isuzu Total Electronic Control 
I.CAS @@Isuzu Clean Air System 
I.D @@Inside Diameter 
I.T. @@Ignition Timing 
I/O @@Input/Output 
I/P @@Instrument Panel 
IA @@Input Axis 
IAC @@Idle Air Control 
IAC @@Idle Air Control Motor 
IACV @@Idle Air Control Valve 
IAF @@International Automobile Federation 
IAS @@Idle Air Stepper 
IAS @@Idle Air Solenoid 
IAT @@Intake Air Temperature Sensor 
IB @@Interior Lights Control 
IBP @@Integral Back-Pressure 
IBT @@Iniitial Brake Lining Temperature 
IC @@Idle Compensator 
IC @@Integrated Circuit 
IC @@Ignition Control 
IC @@Inductance-Capacitance 
IC @@Intermediate Circuit 
IC @@Internal Connection 
IC @@Intake Valve Closes 
IC @@Interal Combustion Engine 
ICA @@Ignition Control Additive 
ICAS @@Isuzu Cleaner Air System 
ICE @@Internal Combustion Engine 
ICEI @@Internal Combustion Engine Institute 
ICM @@Ignition Control Module 
ICRV @@Intake Control Rotary Valve 
ICVS @@Idle Control Solenoid Vacuum Switch 
ID @@Identification 
ID @@Inside Diameter 
ID @@Identification Inside Diameter 
ID @@Inducted Draft 
ID @@Intelligence Division 
ID @@Item Description 
ID @@Inductive Discharge (ignition) 
IDI @@Integrated Direct Ignition 
IDI @@Indirect Injection 
IDIS @@ISUZU Dual Fuel Injection Syste 
IDM @@Ignition Diagnostic Module 
IE @@Index Error 
IE @@Industrial Egineering 
IEC @@Integrated Environmental Contro 
IEE @@Institute of Environmental Engineers 
IES @@Idle Enrichment System 
IEV @@Idle Enricher Valve 
IF @@Intermediate Frequency 
IFC @@Integrated Fuel Control 
IFS @@Inertia Fuel Shutoff 
IFS @@Independent Front Suspension 
IGC @@Ignition Contrlooed Module 
IGCM @@Ignition Control Module 
IGN @@Ignition 
Ign Gnd @@Ignition Ground 
Ign.Mod.Sens. @@Ignition Module Sensor 
IGSW @@Igntion Switch 
IGT @@Igniter 
IHC @@Inlet Heat Control 
IHP @@Indicated Horse Power 
IIA @@Integrated Ignition Assembly 
ILC @@Idle Load Control 
ILC @@Idle Load Compensator 
ILC @@Idle Limitter Cap 
ILC @@Integrated Liquid Coupled(system) 
Illum @@Illumination 
IM @@Impulse Modulation 
IM @@Induction Motor 
IM @@Inspection Manual 
IM @@Index Manual 
IMA @@Idle Mixture Adjuster 
IMCS @@Improved Combustion System 
IMD @@Ignition Monitor Detect 
IMECHE @@Instiution of Mechanical Engineers(UK) 
IMEP @@Indicated Mean Effective Pressure 
IMI @@Institute of the Motor Industry (UK) 
IMP @@Impact 
IMP @@Impeller 
IMP @@Impulse 
IMP @@Integrated Monitor Panel 
IMRC @@Intake Manifold Runner Control 
IMS @@Ignition Module Select 
IN @@*Inch *Intake *
In @@Inch or Inches 
In @@Input 
In Lbs @@Inch Pounds 
IN.HG @@Inches of Mercury 
INC @@Intake Close 
INC @@Incinerator 
INC @@Incorporated 
INC @@Inclusive 
INC @@Increase 
INC @@Inlet Close 
Incand @@Incandescent 
ind @@Indicator 
Infl @@Inflate 
INFL REST @@Inflatable Restrain 
INFL. @@Inflate 
Info @@Information 
Ing @@Ignition 
Inhib. @@Inhibitor 
INJ @@Injector 
Inj. @@Injector or Injection 
INJ1 @@Injector Bank #1 or Injector #1 
INJ2 @@Injector Bank #2 or Injector #2 
INO @@Intake Open 
Inp @@Input 
Inst @@Instrument 
Inst Clstr @@Instrument Cluster 
Int @@Interior 
Interm @@Intermittent 
Intgrtd @@Integrated 
Intgrtn @@Integration 
Intrpt @@Interrupt 
INVECS @@Intelligent and Innovation Vehicle Electric Control System (
Invrtr @@Inverter 
IO @@Intake Valve Opens 
IOE @@Inlet Over Exhaust(valves) 
IOS @@Instrumentation Operations Station 
IP @@Instrument Panel 
IP @@Impact Point 
IP @@Induction Period 
IP @@Initial Point 
IP @@Inside Primary 
IP @@Intersecting Point 
IP @@Initial Phase 
IP @@Ignition Point 
IP @@Iron Pipe 
IP @@Indicated Power 
IP @@Instument Panel 
IPC @@Instrument Panel Cluster 
IPS @@Ignition Pressure Switch 
IR @@Infrared 
IRCM @@Integral Relay Control Module 
IRS @@Independent Rear Suspension 
IRT @@Infrared Radiation Thermometer 
IS @@Idle Switch 
IS @@Independent Suspension 
ISA @@Idle Speed Actuator 
ISA @@International Standard Atmosphere 
ISC @@Idle Speed Control 
ISC @@Idle Speed Compensator 
ISC 1 IAC  @@Motor No.1 Coil IAC
ISC 2 IAC  @@Motor No.2 Coil IAC
ISC 3 IAC @@Motor No.3 Coil IAC
ISC 4 IAC  @@Motor No.4 Coil IAC
ISC F/R @@Idle Speed Control DC Motor Forward/Reverse 
ISC-BYPA @@Idle Speed Control-Bypass Air 
ISC-DCM @@Idle Speed Control Direct Current Motor 
ISC-ENA @@Idle Speed Control DC Motor Enable 
ISC-PW @@Idle Speed Control Pulse Width Drive 
ISCSMA.B @@Idle Speed Control Stepper Motor Winding A or B 
ISCV @@Idle Speed Control Valve 
ISFC @@Indicated Specific Fuel Consumption 
ISO @@International Standards Organization 
ISS @@Idle Stop Solenoid 
ISS @@Industry Standard Specifications 
ISV @@Idle Silence Valve 
ISYNC @@Injector Synchronizing Sensor 
ITC @@Intake Air Temperature Compensator 
ITCS @@Ignition Timing Control System 
ITS @@Idle Tracking Switch 
ITVS @@Ignition Timing Vacuum Switch 
IVC @@Inlet Valve Closed 
IVC @@Intake Valve Closing 
IVO @@Inlet Valve Open 
IVPWR @@Internal Power Supply Voltage 
IVR @@Instrument Voltage Regulator 
IVSC @@Integrated Vehicle Speed Control 
IVSV @@Idle Vacuum Switching Valve 
IVT @@Infinitely Variable Transmission 
IVT @@Intake Valve Throttle(engine) 
IVT @@Intake Valve Throttle 
IVV @@Idle Vacuum Valve 
J @@Joule 
J.J. @@Jungle Jeep 
J/B @@Junction Block 
J/B @@Junction Box 
JACV @@Jet Air Control Valve 
JAF @@Japan Automobile Federation 
JAMA @@Japan Automotive Manufacturers Association inc 
JAPIA @@Japan Auto Parts Industries Association 
JARI @@Japan Automobile Research Institute,inc 
JAS @@Jet Air System 
JASP @@Jet Air Suction Port 
JATMA @@the Japan Automobile Tire Manufacturers* Association,inc 
JD @@Judging Distance 
JES @@Japan Engineering Standards 
JFET @@Junction Type Field Effect Transistor 
JIS @@Japan Industrial Standards 
Jmpr. @@Jumper 
JSME @@Japanese Society of Mechanical Engineers 
Junc @@Junction 
JW @@Jacket of Water 
JW @@Jacket Water(charge air cooling system 
K @@*Kilo *Absolute Temperature
K-B @@Keyboard 
K.R. @@Knock Rating 
k/ohms @@1000 Ohms 
KA @@Kiloamper 
KAM @@Keep Alive Memory 
KAPWR @@Keep Alive Power 
KARMAN VAFM @@Karman Vortices Air Flow Meter 
KC @@Kilocycle 
KCAL @@Kilocalorie 
KCS @@Knock Control System 
KD @@Knocked Down 
KOEO @@Key On, Engine Off 
KOER @@Key On, Engine Running 
KEYPWR @@Key Power 
kg @@Kilograms 
kg/cm2 @@Kilograms Per Square Centimeter 
KI @@Knoch Input 
KKM @@Kreiskolben Motor 
KLCR @@Knock Limited Comperssion Ratio 
KLSA @@Knock Limit Spark Angle 
KM/H @@Kilometers Per Hour 
KM/L @@Kilometers/Liter 
KNK @@Knock Sensor 
KNOCK @@Knock Sensor 
KOEO @@Key On Engine Off 
KOER @@Key On Engine Running 
KPH @@Kilometer Per Hour 
KRA @@Kilopascals 
KRT @@Cathode-Ray Tube 
KS @@Knock Sensor 
KS SYSTEM @@Knock Sensor Sysetem 
KTS @@Knock Threshold Select 
KV @@Kiolvolts 
KVIS @@Kinematic Viscosity 
KW @@Kilo-Watt 
L @@Liter 
L @@L-head engine
L @@L-jetronic
L @@*Lift *Light *Loosen *Liter *Limit *Luxurious *Length *Low *
L Fnt @@Left Front 
L-4 @@Four Cylinder In-Line(engine) 
L-6 @@Six Cylinder In-Line(engine) 
L-R @@Lean-to-Rich(swich) 
L-R @@Left-Right 
L.Fnt. @@Left Front 
L.O. @@Lubrication Oil 
L/D @@Light Duty (Emissions) 
L/D @@Light Duty 
L4 @@Straight 4-Cylinder 
L6 @@Straight 6-Cylinder 
LAB @@Laboratory 
Lat @@Latched 
LB @@Pound 
LB @@Lifeboat 
LB @@Light Bracket 
LB @@Line Busy 
LB @@Local Battery 
LB.FT. @@Pound Feet 
LB.IN. @@Pound Inch 
Lbs. @@Pounds 
LCD @@Liquid Crystal Display 
LCL @@Less Than Carload 
LCL @@Local 
LCL @@Lower Contor Limit 
LCR @@Low Compression Ratio 
LCV @@Load Control Valve 
LDC @@Lower Dead Center 
LDC @@Long Distance Call 
LDT @@Light Duty Truck 
LDV @@Laser Doppler Velocimeter 
LEB @@Lean -Burn Engine 
LED @@Light Emitting Diode 
LF @@Left Front 
LFP @@Low Fuel Pump 
LFT @@Left 
Lftgte @@Liftgate 
Lftgte. @@Liftgate 
LFV @@Lateral Force Variation 
LGP @@Low Ground Pressure 
LH @@Left-hand 
LH @@Latent Heat 
LH @@Liquid Hydrogen 
LH @@Lower Half 
LHC @@Liquid Hydrogen Container 
LHD @@Load,Haul,Dump 
LHDS @@Laser Hole Drilling System 
LHV @@Lower Heat value 
Lic @@License 
LIM @@Linear Induction Motor 
LIM @@Limit 
LIM @@Limiter 
LITV @@Late Intake-Valve Closing(system) 
LIVC @@Late Intake-Valve-Closing(engine) 
Lk @@Lock 
LKM @@Lamp Monitor 
LLA @@Light Load Advance(device) 
LLC @@Lean Limit Control 
LML @@Lean Misfire Limit 
Lmtr or Ltr @@Limiter 
LNG @@Liquefied Natural Gas 
LO @@Low
Lo @@Low 
LOA @@Length Overall 
LOS @@Limited Opetation Strategy 
LP @@Low Pressure 
LPG @@Liquefied Petroleum Gas 
LPG @@Liquid Propane Gas 
LPS @@Line Pressure Switch 
Lps @@Lamps 
LR @@Left Rear 
LR @@Light Duty 
LRO @@Lateral Runout 
LS @@Low Speed 
LSD @@Limited Slip Differential 
LSD @@Limited Slip Differential Oil 
LSI @@Large Scale Integrated Circuit 
LSO @@Low Speed Output 
LSPV @@Load Sensing Proportioning Valve 
LT @@*Low-Tension *Long-Ton *
Lt @@Light 
LT BL  @@Light Blue 
LT GRN @@Light Green 
LT(S) @@Light(s) 
LTBRAKE @@Leading Trailing Brake 
LTL @@Long Taperd Leaf Spring 
Ltr @@Lighter 
Ltr @@Limiter 
Lug @@Luggage 
LUS @@Lock-Up Solenoid 
LVDT @@Linear Variable Differential Transformer 
LVI @@Low Viscocity Index 
Lvl @@Level 
LX @@Lux 
M @@*Minute *Motor *Medium *Moment *Million *Meter *Mass *Milli  *
M @@Mega 
M @@Meter 
M @@Milli 
M @@Minute 
M @@* Milliohm 
M. @@Mounted 
M.. @@Mark 
M.. @@Mass 
M @@Medium 
M. @@Mile 
M. @@Motor 
M.P.S. @@Meters Per Second 
M.T @@Motor Traction 
M.T @@Motor Transport 
M/C @@Mixture Control 
M/C @@Manual Control 
M/T @@Manual Transmission 
M/V @@Mechanical/Vacuum 
MA @@Milliamps 
MA or MAF@@ Mass Airflow 
MAA @@Motor Agents Association (UK) 
MAC. @@Macadam 
MAF @@Mass Air Flow 
MAF @@Mass Air Flow Sensor 
MAF @@Mass Air Flow 
MAF RTN @@Mass Air Flow Return 
MAFS @@Mass Airflow Sensor 
MAFTS @@Manifold Air/Fuel Temperature Sensor 
Mag @@Magnetic 
MAG. @@Magneto 
Maint @@Maintenance 
MAJ @@Major 
MAM @@Medium Automobile Maintenance 
Man @@Manual 
Man @@Manifold 
MAN VAC @@Manifold Vacuum 
Man. Stg @@Manual Steering 
Man. Trans @@Manual Transaxle or Transmission 
MAN.OP. @@Manually Operated 
MAP @@Manifold Absolute Pressure 
MAP @@Manifold Aabsolute Pressure Sensor 
MARS @@Magnetic Electronic Automatic Reservation System 
MAS @@Maximum Axle Spacing 
MAS @@Mixture Adjust Screw 
MAT @@Manifold Air Temperature 
MAT @@Manifold Absolute Temperature 
MAX @@Maximum 
MAX CAP @@Maximum Capacity 
MB @@Motor Base 
MC @@Motorcar 
MC @@Motorcycle 
MCA @@Mitsubishi Clean Air 
MCC @@Manifold Catalystic Converter 
MCT @@Manifold Charge Temperature 
MCU @@Microprocessor Control Unit 
MCU @@Mixture Control Unit 
MCV @@Mixture Control Valve 
MCV @@Manifold Control Valve 
MD @@Modulated Displacement 
MEC @@Motronic Engine Control MOTRONIC 
MECH @@Mechanical 
MEM @@Memory 
MEM-CAL @@Memory Calibration Chip 
Mem. @@Memory 
MEMA @@Motor and Equipment Manufacturers Association (
MEP @@Mean Effective Pressure 
Merc @@Mercury 
Mesg @@Message 
Mess. @@Message 
MF @@Medium Frequency 
Mfd @@Microfarads 
MFI @@Mechanical Fuel Injection 
MFI @@Multi-Port Fuel Injection 
MFJ @@Motorcycle Federation of Japan 
MFWD @@Mechanical Front Wheel Drive(axle 
MG @@Machine Gun 
MHC or MHCV @@Manifold Heat Control Valve 
MI @@Mile 
Mic @@Microphone 
MICS @@Mitsubishi Intelligent Cockpit System 
MIG @@Metal Inert Gas (Welding) 
MIL @@Malfunction Indicator Light 
MIPS @@Million Instructions Per Second 
Mir @@Mirror 
MIRA @@Motor Industry Research Association (UK) 
MISAR @@Microprocessed Sensing and Automatic Regulation 
Mixt. @@Mixture 
MKS @@Meter-Kilogram-Second 
ML @@Motor Light 
MLP @@Manual Lever Position 
MLUS @@Modulated Lockup Solenoid 
MM @@Millimeters 
MM @@Motor Moderate 
MM @@Millimeter 
MMC @@Metal Matrix Composite 
MMEE @@Man-Machine-Environment Engineering 
MMSE @@Man-Machine System Engineering 
MMV @@Manual Modulation Valve 
MN @@Minute 
Mod @@Module 
MON @@Motor Octane Number 
Mon @@Monitor 
MOT @@Ministry of Transport (UK) 
MPA @@Megapascal 
MPC @@Manifold Pressure controlled Fuel Injection 
MPC @@Manifold Pressure Control 
MPC @@Manifold Pressure Controlled Fuel Injection System 
MPFI @@Multi-Port Fuel Injection 
MPFI @@Multi-Point Fuel Injection 
MPG @@Mile Per Gallon 
MPH @@Miles Per Hour 
MPI @@Multi-Point Injection 
MPV @@Multi-Purpose Vehicle 
MS @@Mechnic Spark System 
MS @@Mixture Strength 
MS SYSTEM @@Mechatro Spark System 
MSCD @@Multiple Spark Capacitor Discharge(ignition system) 
MT @@Manual Transmission 
MTA @@Managed Thermactor Air 
MTCL @@Motorcycle 
MTD @@Mounted 
MTR @@Motorized 
Mtr @@Motor 
MTR VEH @@Motor Vehicle 
MTRCL @@Motorcycle 
MTRICL @@Motortricycle 
MTRK @@Motor Truck 
MTRS @@Motor Transport Repair Shop 
MTZ @@Motorized 
MV @@Millivolts 
MV @@Mean Velocity 
MVI @@Medium Viscosity Index 
MVIC @@Mitsubishi Variable Induction Control 
MVMA @@Motor Vehicle Manufacturers Association (
MVS @@Manifold Vacuum Switch 
MWA @@Motor Wheel Brake Assembly 
MWSC @@Motorcycle With a Sidecar 
N @@Neutral Position 
N @@*Newton *Neutral *North *Negative *
N @@Nano 
N @@Negative 
N @@Number 
N @@Newton 
N @@Neutral 
N.C. @@Normally Closed 
N.m @@Newton Meter 
N.O. @@Normally Open 
N.T. @@Number of Teeth 
N.WT. @@Net Weight 
N/A @@Natural Aspirate 
N/A @@Not Applicable 
N/A @@Natural Aspirate 
N/V @@Ratio of Engine RPM to Vehicle Speed 
NA @@Naturally Aspirated 
NA @@Naturally Aspirated Engine 
NA-DI @@Naturally Aspirated Direct Injection(engine) 
NAAO @@North American Automotive Operations 
NADA @@National Automotive Dealer*s Association (
NAPS @@Nissan Anti-Pollution System 
NASCAR @@National Association for Stock Car Auto Racing (
NAT @@National 
NAVI-5 @@New Advanced Vehicle With Intelligence-5 
NAVI-5.D4  @@New Advanced Vehicle With Intelligence-5.D4 
NBC @@Nuclear,Biological,Chemical 
NBDEC @@Speed Based Digital Electronic Control 
NC @@Normally Closed 
NC @@Numerical Control 
NCA @@No Color Available 
NCEO @@Newconcept Engine Oil 
NDIR @@Non Dispersive Infra Red Analyzer 
NDIR @@Non-Dispersive Infra Red 
NDIS @@Nissan Direct Ignition System 
NDS @@Neutral Drive Switch 
NDT @@Non Distructive Testing 
Neut @@Neutral 
NEUT POSI SW @@Neutral Position Switch 
NFB @@Non Feeback Carburetor 
NFL @@Normal Full-Load (speed) 
NG @@No Go *
NGS @@Neutral Gear Switch 
NHP @@Nominal Horsepower 
NHTSA @@National Highway Traffic Safety Administration(US) 
NICB @@National Industrial Conference Board 
NICS @@Nissan Induction Control System 
NL @@No-Load 
NLGI @@Nationl Luburication Grease Institute 
NLP @@Non Locking Retractor 
NLV @@Non-Linear Valve 
NLVR NLV @@Regulator NLV 
NNL @@Normal No-Load (speed) 
NO @@Normaliy Open 
NO @@Number 
NO @@Nitrogen Oxide 
NO @@Nitric Oxide 
NOEI @@Nitrogen Oxide Emission Index 
NOP @@Nozzle Opening Pressure 
NOPH @@No Parking Here! 
Norm @@Normal 
NOTC @@Normal Operating Temperature Control 
NOX @@Oxides of Nitrogen 
NP @@No Power Takeoff 
NPS @@Neutral Pressure Switch 
NPT @@Normal Pressure and Temperature 
NR @@Natural Rubber 
NS @@Nanosecond 
NSET @@No-Load Setting 
NSET @@No Load Opeed Setting of Governor 
NSF @@National Science Foundation
NSNO @@Net Specific NO 
NSW @@Park/Neutral Position Switch 
NT @@Net Tons 
NTEV @@Near-Term Electric Vehicle 
NTHV @@Near-Term Hybrid Vehicle 
NTR @@No Traffic 
NUM. @@Number 
NVCS @@Nissan Valve Timing Control System 
NVH @@Noise, Vibration and Harshness 
O @@Oxygen 
O @@Off 
O-RING @@O-Ring O
O.A. @@Overall 
O.D @@Outside Diameter 
O.N. @@Octane Number 
O.S. @@Off Side 
O.T. @@Oil Tight 
O/D @@Over Drive 
O/S @@Over Size 
OAL @@Overall Length 
OAPEC @@Organixation of the Arab Petroleum Exporting Countries 
OASIS @@On-Line Automotive Service Information System 
OBC @@On-Board Computer 
OBD @@On-Board Diagnostics 
OC @@Oxidation Catalyst 
OC @@Oil Consumption 
OC @@Open Chamber 
OCC @@Output Circuit Check 
OCS @@Oxidizing Catalytic Converter System 
OCT ADJ @@Octane Adjust 
OCT. @@Octane Number 
OCV @@Oil Control Valve 
OD @@Outside Diameter 
OD @@Origin to Destination 
OD @@Outer Diameter 
ODEC @@Overdrive Engagement Control 
ODI @@Oil Drain Intervals 
ODO @@Odometer 
OE @@Opposed-Cylinder Engine 
OH @@Overhaul 
OH. @@Overhang 
OHC @@Over Head Camshaft 
OHC @@Overhead Camshaft 
OHV @@Overhead Valve 
OI @@Overdrive Inhibit 
OL @@Open Loop 
OLTBI @@Open Loop Throttle-body Fuel Injector (system) 
ON @@Octance Number 
ONR @@Octane Number Rating 
ONR @@Octane Number Requirement 
OP-KARMAN @@Optical karman Voltices Air Flow Meter 
OPEC @@Organization of Petroleum Exporting Countries 
Oper @@Operated 
Opt @@Options or Optional 
OR @@Octane Requirements 
OR @@Overload Relay 
ORG @@Orange 
OS @@Oxygen Sensor 
OS @@Over Size 
OS @@Over Steer 
OSAD @@Orifice Spark Advance Control System 
OSC @@Output State Check 
OTCS @@Over-Temperature Control System 
OTS @@Oil Temperature Switch 
OVV @@Outer Vent Valve
OWC @@One Way Clutch 
OX1 @@Oxygen Sensor1 
OX2 @@Oxygen Sensor2 
OX3 @@Sub-Oxygen Sensor3 
OXD @@Oxidation Catalyst 
OXS @@Oxygen Sensor 
OZ @@Ounce 
OZ SENSOR@@Oxygen Sensor 
P @@Park 
P @@Pattern Select Switch 
P @@*Parking *Power *Positive *Pitch *Pilot lamp *Page *Pair *Ply *(AT
P @@Park 
P @@Peta 
P @@Pico 
P @@Page 
P @@Pitch 
P @@Ply 
P @@Positive 
P @@Power 
P @@Passable 
P @@Pressure 
P-AIR @@Pulse Air Induction Reactor 
P-Y-R @@Pitch-Yaw-Roll 
P.C. @@Pitch Circle 
P.D. @@Pitch Diameter 
P.F. @@Power Factor 
P.S. @@Petrol Station 
P.T.O. @@Power Takeoff 
P.U. @@Pickup 
P/B @@Power Brakes 
P/C @@Printed Circuit 
P/C @@Parts Catalog 
P/N @@Park/Neutral 
P/S @@Powder Steering 
P/S Pres Sw @@Power Steering Pressure Switch 
PAB @@Power-Assisted Brake 
PACV @@Pulse Air Check Valve  
PAF @@Pulse Air Feeder 
PAI or PAIR @@Pulse Air Injection 
PAIR @@Pulse Air Injection Reaction System 
PAN @@Peroxy Acy1nitrate 
PAS @@Pulse Air Solenoid or System 
PAS @@Pulse Air Solenoid 
PASS @@Passenger 
PASS. @@Passenger 
PAT @@Patent 
PAV @@Pressure-Actuated-Venting 
PBD @@Pitch Circle Diameter 
PC @@Personal Computer 
PC @@Program Controlled 
PC @@Piece 
PC @@Prechamber(engine) 
PC-SOL @@Purge Control Solenoid 
PCB @@Printed Circuit Board 
PCC @@Part-Load Cylinder Cutout (system) 
PCF @@Pounds Per Cubic Foot 
PCI @@Prechamber Injection (combustion process) 
PCM @@Powertrain Control Module 
PCOV @@Purge Control Valve 
PCSDM @@Passenger Compartment Sensor/Diagnostic Module 
PCT @@Precombustion Chamber Turbocharged 
PCTA @@Precombustion Chamber Turbocharged Aftercooled 
PCU @@Power Conditioning Unit 
PCU @@Power Control Unit 
PCV @@Positive Crankcase Ventilation 
PCV @@Purge Control Valve 
PCV @@Pressure Control Valve 
PCV VALVE @@Positive Crankcase Ventilation Valve 
PD @@Protective Devices 
PECV @@Power Enrichment Control Valve 
PET. @@Petrol 
PET. @@Petroleum 
PETRL @@Petroleum 
PEVR @@Power Enrichment Vacuum Regulator 
PF @@Picofarad 
PFAC @@Pedal Free Auto Choke 
PFE @@Exhaust Pressure Transducer 
PFE @@Pressure Feedback Electronic EGR 
PFI @@Port Fuel Injection 
PFI or PGM-FI @@Programmed Fuel Injection 
PGCV @@Purge Control Valve 
PGM-CARB @@Programmed Carburetor 
PGM-FI @@Programmed Fuel Injection(HONDA) 
PH @@Potential of Hydrogen PH
PHCV @@Power Heat Control Valve 
PHDV @@Power Heat Delay Valve 
PHE @@Programmable High Energy(ignition system) 
PI @@Petrol-Injection 
PIN @@Product Identification Number 
PIP @@Profile Igntion PickUp 
PIST @@Piston 
PK,PK @@Park 
PKG @@Package 
PKG. @@Package 
PL @@*Pay load *Pilot Light *
PL @@Part Load 
PLBS @@Partial Lean Burn System 
PLS @@Pulsating Air System 
PM @@Preventive Maintenance 
PM @@Powder Matallurgy 
PNEU @@Pneumatic 
PNK @@Pink 
PNL @@Panel 
PNP SWITCH @@Park/Neutral Position Switch 
POS @@Positive 
Postn. @@Position 
Pot. @@Potentiometer 
PPF @@Pounds Per Foot 
PPG @@Pulses Per Gallon 
PPL @@Purple 
PPM @@Parts Per Million 
PPS @@Ported Pressure Switch
PPS @@Progressive Power Steering 
PQC @@Production Quality Control 
PR @@Ply Rating 
PR @@Ply-Rating(of tires) 
PR-CV @@Pressure Control Valve 
PR.REGUL @@Pressure Regulatior 
PRC @@Programmable Ride Control 
PRES @@Pressure 
PRESS.REGUL @@Pressure Regulator 
PRGMR @@Programmer 
PRGMR. @@Primary 
PRI @@Primary 
PRNDL @@Park/Reverse/Neutral/Drive/Low 
PROCC @@(Ford) Programmed Controlled Combustion (system) 
PROG @@Programmable 
PROM @@Programmable Read Only Memory 
Prom. @@Programmable 
PRTL @@Partial 
PRV @@Pressure Regulating Valve 
PRY @@Primary 
PS @@Push Switch 
PS @@Power Steering 
PS @@Polystyrene 
PS @@Pneumatic Suspension 
PS @@Power-Assisted Stecring 
PSCU @@Power Steering Control Unit 
PSD @@Partical Shut Down 
PSG @@Pressure Compensated Simple Governor
PSI @@Pound Per Square Inch 
PSIA @@Pound Per Square Inch Absolute 
PSON @@Programmable Speedometer/ Odometer Module 
PSOV @@Purge Shutoff Valve 
PSP @@Power Steering Pressure 
PSPS @@Power Steering Pressure Switch 
PSR @@Power Steering Relay 
PSS @@Pattern Select Switch 
PSTC @@Power Steering Test Connector 
PSV @@Pulse Air Shutoff Valve 
PSV @@Public Service Vehicle 
PSV @@Power Steering Valve 
PT @@Part Throttle 
PT. @@Pint 
PTC @@Positive Temperature Coefficient 
PTCH @@Positive Temperature Coefficient Heater 
PTE.STA. @@Petrol Station 
PTFE @@Polytetrafluoroethylene 
PTO @@Power Take Off 
PTOS @@Power Takeoff System 
Pts @@Pints 
PTU @@Partial Throttle Unlock 
PURGE CV @@Purge Control Valve (canister purge valve) 
PV @@Pulse Air Valve 
PVA @@Ported Vacuum Advance
PVBrk @@Primary Vacuum Break 
PVC @@Polyvinyl Chloride 
PVCS @@Power Vlave Control System 
PVFFC @@Pressure/Vacuum Fuel Filler Cap 
PVS @@Ported Vacuum Switch 
PW @@Pulse Width 
PWM @@Pulse Width Modulated 
Pwr @@Power 
PWRGND @@Power Ground 
PX @@Pistion Engine 
Q @@*Quation *Quantity *
Q @@Quantity 
Q @@Quarter 
Q @@Question 
Q.D. @@Quick Detachable 
QC @@Quality Control 
QEAV @@Quick Exhaust Air Valve 
QOS @@Quick On Start System  
QOS @@Quick Exhaut Valve 
QPS @@Quick Pulse System 
QRV @@Quick Release Valve 
QSSI @@(Isuzu)Quick Start and Silent Idling System 
QT. @@Quart 
QTS. @@Quarts 
QTY @@Quantity 
QTZ @@Quartz 
R @@Rear 
R @@*Rate *Reverse *Rear *Radiu *Resistance *Right Side *Retard *Round *
R @@Radius 
R @@Radial 
R @@Right 
R @@Repair 
R @@Ratio 
R&M @@Rapair and Maintenance 
R&M @@Reliability and Maintainability 
R&QC @@Reliability and Quality Control 
R-4 @@Radial Four Cyl. A/C Compressor 
R.C. @@Remote Control 
R.F. @@Run-Flat 
R.H.S. @@Right-Hand Side 
R.M.M.P. @@Rich Mixture Maximum Power 
R.T. @@Room Temperature 
R/B @@Relay Box 
R* @@Redwood Viscosity 
RA @@Rockwell Hardness A Scale 
RABS @@Rear Anti-Lock Brake System 
RAC @@Remote Accessory Control 
RAC @@Royal Automobile Club(UK) 
RAD @@Radian 
Rad @@Radiator 
RADAR @@Radio Detecting and Ranging 
RAM @@Random Access Memory 
RB @@Rockwell Hardness B Scale 
RBS @@Recirculating Ball Type Steering Gear 
RC @@Rockwell Hardness C Scale 
RCM @@Rapid Compression Machine 
Rcvr @@Receiver 
RD @@Road 
Rdcr @@Reducer 
RDLV @@Reverse Delay Valve 
RDLVD @@RDLV Dual 
RDLVS @@RDLV Single 
RDO @@Retard Delay Orifice 
RDV @@Retard Delay Valve 
RE @@Rotary Engine 
RE/RD @@Rear Engine/Rear Drive 
REAPS @@Rotary Engine Anti-Pollution System 
RECIRC @@Recirculation 
Recirc @@Recirculator 
Reduct @@Reduction 
Ref. @@Reference 
REG @@Regulator Assembly 
Reg. @@Regulator 
Rel @@Release 
REP @@Repair 
Res @@Resistor 
RES @@Resistance *
Resist @@Resistance 
RET @@Retard 
Retrac @@Retract or Retractor 
REV @@*Revolution *Reverse *
Rev @@Revolution 
RF @@Right Front 
RFI @@Radio Frequency Interference 
RFL @@Refuel 
RFV @@Redial Force Variation 
RH @@Right-hand 
RHD @@Right-Hand Side 
Rheo @@Rheostat 
Rly @@Relay 
Rly. @@Up Relay Up 
RM @@Relay Module 
RMA @@Rubber Manufacturers Association (
RMS @@Root of Mean Square 
ROM @@Read Only Memory 
ROPS @@Roll-Over Protective Structure 
ROSCO @@Rotating Stratified Combustion System 
Rplnsg @@Replenishing 
RPM @@Revolutions Per Minute 
RPR @@Repair 
RPS @@Revolutions Per Second 
RPV @@Remotely Piloted Vehicle 
RPV @@Residual Pressure Valve 
RR @@Rear Engine Rear Drive 
RR @@Right Rear 
RR @@Rolling Resistance 
Rrv. @@Revolution 
RS @@Reverse Spark 
RS @@Rubber Spring 
RSG @@Road Speed Governor 
Rsm @@Resume 
RSS @@Root Square Sum 
RSV @@Research Safety Vehicle 
Rt @@Right 
Rt.Fnt @@Right Front 
Rtd @@Retard 
Rtrn @@Return 
RTV @@Room Temperature Vulcanizing Sealer 
RU. @@Rubber 
RV @@Rollover Valve 
RV @@Recreational Vehicle 
RV @@Relief Valve 
RVI @@Recreational Vehicle Institute (US) 
RVSV @@Rollover/Vapor Separator Valve 
RWAL @@Rear Wheel Anti-Lock Brake 
RWD @@Rear Wheel Drive 
RWM @@Read/Write Memor y 
S @@*South *Second *Single *Sport *Special  *
S @@Second 
S @@Speed 
S @@Stroke 
S @@Spare 
S.G. @@Spark Gap 
S.W. @@Switch 
S/B @@Seat Belt 
S/B @@Stroke-Bore Ratio 
S* @@Saybolt Viscosity 
SA @@Slip Angle 
SA @@Semi-Automatic 
SA @@Spark Advance 
SA-FV @@Separator Assembly-Fuel/Vacuum 
SAE @@Society of Automotive Engineers (
SAEC @@Society of Automotive Engineers of China
SAM @@Stand Alone Memory 
SAME @@Secondary Air Management Control 
SAS @@Secondary Air Supply 
SAS @@Slow Adjust Screw 
SAT @@Self Aligning Torque 
Satlt @@Satellite 
SAV @@Short Air Valve 
SAV @@Shot Air Valve 
SAVM @@Spark Advance Vacuum Modulator 
SB @@Secondary Battery 
SB @@Switch Board 
SBC @@Single Bed Catalytic 
SBC @@Single Bed Converter 
SBEC @@Single Board Engine Controller 
SBI @@Standard Breakerless Ignition 
SBR @@Styrene Butadiene Rubber 
SC @@Signal Conditioner 
SC @@Stratified Charge 
SC @@Signal Conditioner 
SC @@Supercharge 
SC @@Sub-Chamber 
SCAP @@Silicon Capacitance Absolute Pressure(sensor) 
SCC @@Spark Control Computer 
SCCS @@Speed Control Command Switch 
SCR @@Sillicon Control Rectifier 
SCS @@Speed Control Switch 
SCS @@Spark Control System 
SCS @@Speed Controlled Spark 
SCS @@Air Suction Control Solenoid 
SCS @@Stabilized Combustion System 
SCS @@Slip Control System 
SCS @@Speed-Controlled Spark System 
SCT @@Shutterstat Control Temperature 
SCT C @@Scout Car 
SCTO @@Spark Coolant Temperature Override 
SCV @@Spark Control Valve 
SCV @@Sealed Crankcase Ventilation 
SCVAC @@Speed Control Vacuum 
SCVG @@Scavenging 
SCVNT @@Speed Control Vent 
SD @@Serial Data 
SD @@Super Deluxe 
SD @@Spark Delay 
SDA @@Speed Density Adaptive 
SDC @@Semi Drop Center Rim 
SDFI(SFI) @@Sequential Electronic Fuel Injection 
SDM @@Supplemental Restraint System Diagnostic Module 
SDU @@SRS Diagnostic Unit 
SDV @@Spark Delay Valve 
SDV @@Spark Deceleration Valve 
SE @@Service Equipment 
SEC @@*Seeond *Secondary *
Sec @@Secondary 
SEC ACT @@Secondary Actuator 
SEEC @@Subaru Exhaust Emission Control 
SEFI @@Sequential Electronic Fuel Injection 
Sel @@Selector or Selection 
SEN @@Sensor 
Send. @@Sender or Sending 
SES @@Service Engine Soon 
SF @@Side Force 
SF @@Stability Factor 
SFC @@Specific Fuel Consumption 
SFI @@Sequential Electronic Fuel Injection 
SFI @@Sequential Fuel Injection 
SFOC @@Specific Fuel Oil Consumption 
SFPD @@Self-Propelled 
Sfty @@Safety 
SG @@Specific Gravity 
SG @@Spheroidal Graphite (iron) 
SG @@Spark Gap 
SH.ABS. @@Shock Absorber 
SHED @@Sealed Housing Evaporative Determination System 
SHF @@Super High Frequency 
Shld @@Shield 
SHO @@Super High Output 
SHP @@Shaft Horrse Power 
SI @@Spark Ignition 
SI @@Spark Ignition Engine 
SI @@System International 
SI @@Spark Ingnition Engine 
Sig @@Signal 
Sig.Rtn @@Signal return 
SIL @@Shift Indicator Light 
SIPS @@Side Impackt Protection System 
SIR @@Supplemental Inflatable Restraint 
SL @@Solenoid 
SL @@Sport & Luxurious 
SLA @@Short-Long Arm Type 
SMMT @@Society of Motor Manufacturers and Traders (UK) 
SMT @@Sensor Modes Test 
SMV @@Slow-Moving Vehicle 
SN @@Signal Noise 
SOF @@Soluble Organic Fraction 
SOHC @@Singal-Overhead-Camshaft(engine) 
SOL @@Solenoid 
Sol @@Solenoid 
Sol.V @@Solenoid Valve 
Sole-Vac @@Solenoid Vacuum 
SP @@Start Pickup 
Spd @@Speed 
Speedo @@Speedometer 
SPFI @@Sequential Port Fuel Injection 
SPI @@Single-Point Injection 
SPKC @@Spark Control 
SPLC @@Seat-Pan Load Cell 
SPOUT @@Spark Output 
SQ @@Square 
SRS @@Supplemental Restraint System (Air Bag) 
SS @@Shift Solenoid Circuit 
SS @@Standing Start 
SS TIRE @@Straight-Side Tire 
SS3 @@Super Sport-Type 
SSC @@SUZUKI Saving Control System 
SSCS @@SUZUKI Saving Control System Swirl 
SSD @@System Self-Diagnostics 
SSI @@Solid State Ignition 
SSR @@Solid State Relay 
SSS @@Super Sport Sedan 
ST @@Scan Tool 
ST @@Short Ton 
St @@Start 
ST DATA @@Scan Tool Data 
Sta.Wag @@Station Wagon 
STAR @@Self Test Automated Readout 
STAS @@Starter Switch 
STD @@Standard 
STD @@Standard 
STI @@Self Test Input Circuit 
STI @@Self Test Input 
STLR @@Semitrailer 
STO @@Self-Test Output 
Stop Lt @@Stop Light 
STP @@Standard Temperature and Pressure 
STRG @@Steering 
Strkr @@Striker 
Strng @@Steering 
Strtr @@Starter 
STV @@Suction Throttling Valve 
SUB-02 @@Sub Oxygen Sensor 
Supp @@Supply 
Susp @@Suspension 
SV @@Side Valve 
SV @@Surface-Volume Ratio 
SV @@Safety Valve 
SV-CBV @@Solenoid Valve Carburetor Bowl Vent 
SVC @@(crank angle at )Suction Valve Close 
SW @@Switch 
Sys @@System 
T @@Turbocharger 
T @@*Throttle Valve *Tempreature *Ton *Thickness *Tightness *Top Point *
T @@Ton 
T @@Temperature 
T @@Thickness 
T @@Throttle 
T @@Trailer 
T-Q @@Thermo-Quad 
T-VIS @@Toyota Variable Induction System 
T.C. @@Turbo Charge Engine 
T.D.C. @@Top Dead Center 
T.E. @@Tractive Effort 
T.L. @@Truckload 
T.V. @@Throttle Valve 
T/KM @@Ton Kilometers 
T/P @@Throttle Body 
TAB @@Thermactor Air By-Pass 
TAC @@Thermostatic Air Cleaner 
Tach @@Tachometer 
TACHR @@Tachometer Resistor 
TACHR @@Tachometric Relay 
TAD @@Thermactor Air Diverter 
TAI @@Thermal Anti-Icing(system) 
Taillt @@Taillight 
TAP @@Thermostatic Accelerating Pump 
TAP @@Throttle-Alternator Position 
TAR @@Throttle Angle Rate 
TAS @@Throttle Adjust Screw 
TAS @@Total Air Suspension 
TAV @@Temperature Actuated Vacuum 
TB @@Toe Board 
TBB @@Throttle Body Back-up 
TBI @@Throttle Body Injection 
TBI @@Throttle Body Fuel Injection 
TBO @@Time Between Overhauls 
TC @@Turbo Charge 
TC @@Twin Carburetor Twin Camshaft 
TC @@Traffic Control 
TC @@Top Center 
TCW @@Two-Cycle Water-Cooled 
TC @@Turbo Charge 
TC2 @@Two-Stage Turbocharged 
TCC @@Torque Converter Clutch 
TCC @@Transaxle Converter Clutch 
TCC @@Transmission Converter Clutch 
TCC @@Toque Converter Clutch 
TCCS @@Texaco Controlled-Combustion System 
TCCS @@Toyota Computer Controlled System 
TCI @@Transistorized Coil Ignition(system) 
TCIL @@Transmission Control Indicator Lamp 
TCL @@Traction Control System 
TCLU @@Toque Converter Lock-Up Unit 
TCP @@Temperature Compensated Pump 
TCS @@Taransmission Control Spark 
TCS @@Transmission Control Switch 
TCS @@Themal Control System 
TCS @@Transmission Controlled Spark 
TCT @@Thermostat Control Temperature 
TDC @@Top Dead Center 
TDCL @@Total Diagnostic Communication Link 
TDCS @@TDC Sensor 
TDI @@Toyota Direct Ignition System 
TDS @@Temperature Detect Switch 
TEL @@Tetraethyllead 
TEL @@Top Engine Speed Limit 
TEM @@Toyota Electronically Modulated Suspension 
Temp @@Temperature 
TEMS @@Toyota Electronic Modulated Suspension 
Term @@Terminal 
TFI @@Thick Film Integrated 
TFI @@Thick Film Ignition 
TFV @@Tractive Force Variation 
TGP @@Turbulence Generating Pot 
TGS @@Top Gear Switch 
TH @@Throttle Valve 
THD @@Thread 
Therm @@Thermostat 
THERMAC @@Thermostatic Air Cleaner 
THK @@Thickness 
THM @@Turbo Hydra-Matics 
Throt @@Throttle 
THRTL POS SEN @@Throttle Position Sensor Adjustment 
THS @@Transmission Hydraulic Switch 
TICS @@Triple Port Induction Control System (
TIR @@Total Indicator Runout 
TISCS @@Timed Induction With Super Charge 
TIT @@Turbine Inlet Temperature 
TIV @@Thermactor Idle Vacuum Valve 
TL @@Trailer 
TL.MTD. @@Trailer-Mounted 
TLS @@Toque Limiting System 
TLV @@Toque Limiting Valve 
TMD @@Toque Modification Device 
TME @@Transverse Mid-Engine 
TML @@Tetramethyllead 
TN.-ML. @@Ton-Miles 
TO @@Throttle Opener 
TOCS @@Throttle Opener Control System 
TOT @@Transmission Oil Temperature 
TP @@Throttle Position 
TP @@Throttle Position Sensor 
TP @@Throttle Positioner 
TP @@Throttle Position(sensor) 
TP @@Throttle Positioner 
TPCD @@Thermactor Pump Clutch Disconnect 
TPHC @@Tailpipe Hydrocarbon 
TPI @@Theads Per Inch 
TPI @@Tuned Port Injection 
TPIS @@Transmission Position Indicator Swich 
TPOUT @@Throttle Position Output 
TPS @@Throttle Position Sensor 
TPS @@Tank Pressure Sensing 
TPS @@Thermal Protection System 
TPT. @@Transport 
TQC @@Total Quality Control 
TR @@Thermal Reactor 
TR @@Transportation 
TRA @@Tire and Rim Association(US) 
TRAC @@Tractor 
TRANS @@Transaxle/Transmission 
Transis @@Transistor 
TRANSIS. @@Transistor 
TRC @@Traction Control System 
TRD @@Transmission Select Switch Drive 
Tripmdr @@Tripminder 
Tripmdr. @@Transmitter 
TRK @@Track 
TRK @@Truck 
TRK DVR @@Truck Driver 
TRK MTD @@Truck-Mounted 
TRL @@Transmission Select Switch Low 
TRNAMTR. @@Transmitter 
TROD @@Transmission Select Switch Overdrive 
TRS @@Transmission-Regulated Spark (system) 
TS @@Temperature Sensor 
TS @@Transmission Switch 
TSAD @@Two Speed Accessory Drive 
TSB @@Technical Service Bulletin 
TSP @@Throttle Solenoid Position 
TSS @@Transmission Speed Sensor 
TTC @@Toyota Total Clean System 
TTS @@Transmission Temperature Switch 
Turbo @@Turbocharged 
TURBO-DI @@Turbocharged Direct Injection(engine) 
TV @@Thermovalve 
TV @@Throttle Valve 
TVBV @@Turbocharger Vacuum Bleed Valve 
TVC @@Throttle Valve Control 
TVO @@Tractor Vaporizing Oil (fuel) 
TVPS @@Throttle Valve Position Switch 
TVRS @@Television & Radio Suppression 
TVS @@Thermal Vacuum Switch 
TVSV @@Thermostatic Vacuum Switching Valve
TVTV @@Thermal Vacuum Transmitting Valve 
TVV @@Thermal Vent Valve 
TVV @@Thermal Vacuum Valve 
TVV.TV @@Thermal Vacuum Valve 
TWC @@Three Way Catalytic 
TWC @@Three Way Catalytic Converter 
TWC @@Three Way Catalyst System 
TWC @@Three Way Conversion 
TWC+OC @@Three Way Catalyst and Conventional Oxidation Catalyst 
TWI @@Tread Ware Indicator 
Twilt @@Twilight 
TWT @@Three-Wheel Turbocharger 
TXV @@Thermal Expansion Valve 
Typ @@Typical 
U-JOINT @@Universal Joint 
U.S.G. @@US Gallon 
UB @@Underbody 
UCL @@Upper Control Limit 
UDC @@Upper Dead Center 
UE @@Under Engine 
UFV @@Uncontrolled Fuel Volume 
UIC @@Universal Ignition Control 
UJ @@Universal Joint 
UNARM @@Unarmored 
Unlat @@Unlatched 
US @@Under Size 
USP @@US Patent 
UV @@Ultra Violet 
UVS @@Underhood Vent System 
V @@Volts 
V @@V-Belt V
V @@V-Engine V
V @@*Voltage *Voltmeter *Velocity *Volume *
V @@Vehicle 
V @@Volume 
V @@Velocity 
V-6 @@Six Cylinder Engine-Arranged in a *V 
V-8 @@Eight Cylinder Engine-Arranged in a *V 
V-AMP @@vvacuum aamplifier 
V-RSR @@Vacuum Reservoir 
V-TCS @@Viscous Traction Contorol System 
V.Pwr. @@Vehicle Power 
V6 @@V6 Engine
V8 @@V8 Engine
VA @@Vacuum Amplifier 
VAB @@Variable Auxiliary Air Bleed 
VAC @@Vacuum advance Control 
Vac @@Vacuum 
VSW @@Vacuum Switch 
Vac.VV @@Vacuum Vent Valve 
VACP @@Vacuum Pump 
VACVV-T @@Thermactor Vacuum and Vent Control Valve 
VACVV-D @@Distributor Vacuum and Vent Control Valve
VAF @@Vane Air Flow 
VAN @@Variable Area Nozzle 
VAPS @@Variable Assist Power Steering 
Var @@Variable 
VASC @@Vacuum Advance spark Control 
VAT @@Variable AreaTurbocharger 
VATS @@Vehicle Anti-Theft System 
VB @@Vacuum Break 
VC @@Valve Control 
VCC @@Viscous Clutch Converter 
VCC @@Viscous Converter Clutch 
VCDE @@Variable Compression Diesel Engine 
VCKV @@Vacuum Check Valve 
VCKV @@Vacuum Control Check Valve 
VCM @@Vehicle Condition Monitoring 
VCM @@Vacuum Control Moudulator (nozzle) 
VCMV @@Vacuum Control Modulator Valve 
VCR @@Variable Compression Ratio 
VCRM @@Variable Relay Control Module 
VCS @@Vacuum Controlled Switch 
VCS @@Vacuum Control Solenoid 
VCS-CT @@Vacuum Controlled Switch Cold Temperature 
VCTS @@Vacuum Control Temperature Sensing Valve 
VCU @@Vacuum Control Unit 
VCU @@Viscous Coupling Unit 
VCV @@Vacuum Control Valve 
VCV @@Vacuum Check Valve 
VDV @@Vacuum Differential Valve 
VDV @@Vacuum Diverter Valve 
VDV @@Vacuum Delay Valve 
VE @@Vehicle Economy 
VEC @@Vehicle-Engine-Cooling(system) 
VECI @@Vehicle Emission Control Information 
VECI LABEL @@Vehicle Emission Control Information Label 
Veh @@Vehicle 
Vert @@Vertical 
VF1 @@Data Link Connector 1 
VF2 @@Data Link Connector 2 
VFD @@Vacuum Fluorescent Display 
VH @@Vent Hole 
VHC @@Vacuum Exhaust Heat Control Valve 
VHCL SPEED SE @@Vehicle Speed Sensor 
VHO @@Very High Output 
VI @@Viscosity Index 
VICS @@Variable Inertia Charging System 
VIN @@Vehicle Identification Number 
VIP @@Vehicle In Progress 
VIPS @@Variable Induction Port System 
VIR @@Valves In Receiver 
VIR @@Valocity Indicator Section 
VIS @@Vacuum Input Switch 
VIS @@Viscosity 
VIV @@Valve 
VKT @@Vehicle Kilometers of Travel 
VL @@Vacuum Limitter 
VLR @@Volt Loop Reserve 
Vlv. @@Valve 
VM @@Vacuum Modulator 
VM @@Vane Meter 
VMCV @@Vacuum Modulator Check Valve 
VMT @@Vehicle-Miles of Travel 
VMV @@Vacuum Modulator Valve 
VMVS @@Vacuum Modulator Valve Switch 
Volt @@Voltage 
VOM @@Volt-Ohmmeter 
VOS @@Vacuum Operated Secondary 
VOTM @@Vacuum Operated Throttle Modulator 
VP @@Vehicle Park 
VPOC @@Vacuum Pull-Off Choke 
VPWR @@Vehicle Power supply voltage 
VPWR @@Vehicle Power 
VR @@Vacuum Reservoir 
VR/S @@Vacuum Regulator/Solenoid 
VRCKV @@Vacuum Reverse Check Valve 
VRDV @@Vacuum Retard Delay Valve 
VREF @@Voltage Reference 
VRESER @@Vacuum Reservoir 
VREST @@Vacuum Restrictor 
VRIS @@Variable Resonance Induction System (
VRS @@Vacuum Regulator/Solenoid 
VRS @@Vacuum Retad Switch 
VRV @@Vacuum Reducer Valve 
VRV @@Vacuum Regulator Valve 
VS @@Vacuum Solenoid 
VS @@Vacuum Switch 
VS @@Valve Set 
VS @@Variable Speed 
VSA @@Vacuum Switch Assembly 
VSAD @@Vacuum Spark Advance Disconnect 
VSC @@Vehicle Speed Control Solenoid 
VSC @@Vehicle Speed Control 
VSD @@Vacuum Switch Dump 
VSDV @@Vacuum Source (or Signal)Dump Valve 
VSG @@Variable Speed Governer 
VSL @@Vehicle Speed Limiter 
VSR @@Vehicle-Sensitive Emergency Locking Retractor 
VSS @@Vehicle Speed Sensor 
VSSBUF @@Vehicle Speed Sensor(buffered) 
VSV @@Vacuum Solenoid Valve 
VSV @@Vacuum Switching Valve 
VSW @@Vacuum Switch 
VT @@Vacuum Fluoresscent (display) 
VTC @@Valve Timing Control 
VTD-4WD @@Variable Torque Delivery Electronically Controlled 4WD 
VTEC @@Variable Valve Timing & Life Electronic Control System (
VTK @@Vacuum Throttle Kicker 
VTM @@Vacuum Throttle Modulator 
VTP @@Vacuum Throttle Positioner 
VTV @@Vacuum Transmitting Valve 
VV @@Variable Venturi 
VVA @@Venturi Vacuum Amplifier 
VVC @@Variable Voltage Choke 
VVCS @@Vacuum Vent Control System 
VVCV @@Vacuum Vent Control Valve 
VVT @@Variable Valve Timing 
VVT @@Ventui Vacuum Transducer 
VVV @@Vacuum Vent Valve 
VVVac @@Vent Valve Vacuum 
VW @@Volkswagen 
W @@Watt 
W @@Weight 
W @@Width 
W @@Work 
W.G. @@Worm Gear 
W.P. @@Waterproof 
W.P. @@Working Pressure 
W @@With 
W/O @@Without 
W/S @@Windshield 
W/Shield @@Windshield 
W/W @@With Winch 
WAC @@Wide Open Throttle A/C Cutoff 
Warn @@Warning 
WAT.JACK @@Water Jacket 
WB @@Wheel Base 
WC @@With Care 
WCLD @@Water-Cooled 
Wdo @@Window 
WH @@Wheel House 
WH @@Wheel 
WH @@Wheeled 
WHT @@White 
Wip @@Wiper 
WKR @@Wrecker 
WL @@Waterl Line 
WM @@White Metal 
WMI @@World Manufacturer Indentifier 
WN @@Winch 
WO/EGR @@Without EGR 
WO/PTO @@Without Power Takeoff 
WO/W @@Without Winch 
WOC @@Weight of Car 
WOG @@Water-Oil-Gas 
WOL @@Whole of Life 
WOT @@Wide Open Throttle 
WPP @@Water Proof Packing 
WS @@Windshield 
WS @@Wind Speed 
Wshr @@Washer 
WSIR @@Webbing Sensitive Inertia Reel 
WT @@Warming Tag 
WU-OC @@Warm Up Oxidation Catalytic Convertor 
WU-TWC @@Warm Up Three-Way Catalytic Convertor 
X-RDS @@Cross Roads 
X-VALVE @@Expansion Valve 
YD @@Yard 
YEL @@Yellow 
YS @@Yield Strength 
Z @@Zero 
Z @@Zone