A A - Amperes AALA - American Automobile Labelling Act ABARS - Automobile Backward Automatic Ranging System ABC - Active Body Control ABS - Antilock Brake System AC - Alternating Current A/C - Air Conditioning ACC - Adaptive Cruise Control ACC - Air Conditioning Clutch ACC - Automatic Climate Control ACCS - Air Conditioning Cyclic Switch ACD - Air Conditioning Demand ACE - Active Cornering Enhancement ACL - Air cleaner ACM - Airbag Control Module ACR4 - Air Conditioning Refrigerant, Recovery, Recycling, Recharging ACON - Air Conditioning On ACP - Air Conditioning Pressure ACT - Air Charge Temperature ACV - (thermactor) Air Control Valve A/D - Analog to Digital ADAS - Advanced Driver Assistance System ADBV - Anti Drainback Valve ADC - Automatic Distance Control ADU - Analog-Digital Unit AECM - Airbag Electronic Control Module AFC - Air Flow Control AFC - Air Fuel Control AFCD - Advanced Frontal Crash Dummy AFCM - Alternate Fuel Control Module AFR - Air Fuel Ratio AGVS - Automated Guided Vehicle System AHR - Active Head Restraint AHS - Active Handling System AIM - Automotive Interior Material AIR - Secondary air injection AIRB - Secondary Air Injection Bypass AIRD - Secondary Air Injection Diverter AIS - Automatic Idle Speed ALC - Automatic Level Control ALDL - Assembly Line Data Link (replaced with DLC) ALT - Alternator (replaced with GEN) AMB - Ambient AMS - Automatic Music Search AMT - Automated Manual Transmission AOD - Automatic Overdrive AODE - Automatic Overdrive Electronic (transmission) AODE-W - Automatic Overdrive Electronic Wide (ratio transmission) AOS - Automatic Occupant Sensing AP - Accelerator Pedal APADS - Air Conditioning Protection and Diagnostic System APECS - Advanced Proportional Engine Control System API - American Petroleum Institute APT - Adjustable part Throttle ARC - Active Roll Control ARC - Automatic Ride Control ARS - Automatic Restraint System ARTHUR - Automatic Radio system for Traffic situations on Highways and
Urban Roads ASA - Air Signal Attenuator ASARC - Air Suspension Automatic Ride Control ASC - Anti Stall Control ASD - Automatic Shutdown ASF - Audi Space Frame ASG - Automatic-Shift Gearbox ASM - Acceleration Simulation Mode ASR - Acceleration Slip Regulation ASSYST - Active Service System ASTC - Automatic Stability and Traction Control ASTM - American Society for Testing and Materials A/T - Automatic Transmission/Transaxle ATC - Automatic Temperature Control ATDC - After Top Dead Center ATM - Actuator Test Mode ATTS - Advanced Torque Transfer System ATX - Automatic Transaxle AWD - All Wheel Drive AWG - American Wire Gage AYC - Active Yaw Control AXOD - Automatic Overdrive Transaxle AXOD-E - Automatic Overdrive Transaxle - Electronically Controlled
B B+ - Battery voltage BARO - Barometric (pressure) BCM - Body Control Module BECU - Body Electronic Control Unit BHP - Brake Horsepower BLM - Block Learn Multiplier (replaced with LT FUEL TRIM) B-LVL - Bilevel BMAP - Barometric and Manifold Absolute Pressure BOB - Break-Out Box BOO - Brake On/Off BP - Back Pressure BPA - Bypass Air BPW - base pulse width BTDC - Before Top Dead Center BTSI - Brake Transmission Shift Interlock Btu - British thermal units BV - Battery Voltage
F FABS - Flexible Auto Body System FAF - Fan Air Flow FBC - Feedback Carburetor FC - Fan Control FC - Friction Curve FCP - Fuel Cell Partnership FDBK - Feedback FDC - Fuel Data Center FEAD - Front End Accessory Drive (belt) FED - Federal (except California) FEDS - Flexible Engine Diagnostic System FF - Flexible Fuel FFCRS - Front-Facing Child Restraint System FFFP - Fuel-Flexible Fuel Processor FFS - Fine-blanking and Finishing System FFS - Flexible Fuel Sensor FFWS - Fuel Filter Water Separator FI - Fuel Injection FIDO - Flame Ionization Detector Optimization FIPL - Fuel Injection Pump Lever FIPT - Fuel Inlet Pressure Test FLO - Fast Light-Off FLVV - Fill Limit Vent Valve FMEM - Failure Mode Effects Management FMVSS - Federal Motor Vehicle Safety Standards FP - Fuel Pump FPI - Fins Per Inch FPM - Fuel Pump Monitor FPRC - Fuel Pressure Regulator Circuit FPS - Fast Pass Standard FRACAS - Failure Reporting And Corrective Action System FRC - Forced FRS - Face Recognition System FRV - First Response Vehicle FSDI - Four-Stroke, Direct Injection FT - Fuel Trim FTP - Federal Test Procedure FUDC - Federal Urban Driving Cycle FWD - Front Wheel Drive
H H - Hydrogen H2O - Water HAST - High Accelerated Stress Test HBA - Hydraulic Brake Assist HBU - Hub Bearing Unit HC - Hydrocarbons HCCI - Homogeneous-Charge, Compression Ignition HCV - Heavy Commercial Vehicle H/CMPR - High Compression HD - Heavy Duty HDC - Heavy Duty Cooling HDGV - Heavy Duty Gasoline-fueled Vehicle HEDF - High Speed Electro Drive Fan (relay or circuit) HEGO - Heated Exhaust Gas Oxygen (sensor) (replaced with HO2S) HEGOG - HEGO Ground (circuit) HEPS - Hydraulic Electric Power Steering HEUI - Hydraulic-actuated Electronically-controlled Unit Injector HFC - High Fan Control HFM - Hot Film Meter HFP - High Fuel Pump Hg - Mercury Hi Alt - Hi Altitude HIS - Horizontal Impact Sensor HLDT - Heavy Light-Duty Truck HLOS - Hardware Limited Operating Strategy HO - High Output HO2S - Heated Oxygen Sensor hp - Horsepower HPDI - High Pressure Direct Injection HPL - High Pressure Liquid HPS - Head Protection System HPS - High Performance System HPV - High Pressure Vapour HSA - Head Side Airbag HSC - High Swirl Combustion HSCDS - High-Sensitivity Collision Detection System HSDI - High-Speed Direct Injection HSE - High-Speed Enrichment HUD - Heads Up Display HVAC - Heater-Vent-Air Conditioning HVACM - Heater-Vent-Air Conditioning Module HVI - High Viscosity Index HVM - Heater Vent Mondule HYPAS - Hydraulic Power Assisted Steering Hz - Hertz
K KAM - Keep Alive Memory KAPWR - Keep Alive power kg - Kilogram kHz - Kilohertz km - Kilometer KOEO - Key On Engine Off KOER - Key On Engine Running kPa - Kilopascal KS - Knock Sensor kV - Kilovolts
M MAF - Mass Air Flow MAP - Manifold Absolute Pressure MAT - Manifold Air Temperature (replaced with IAT) MC - Measuring Core MC - Mixture Control MCU - Microprocessor Control unit (replaced with PCM) MD - Modulated Displacement MDP - Manifold Differential Pressure MECS - Mazda Electronic Control System MEMCAL - Memory Calibration MFI - Multiport Fuel Injection MIC - Mechanical Instrument Cluster MIL - Malfunction Indicator Lamp MIP - Mixer Inlet Pressure MLP - Manual Lever Position MMC - Manifold Mounted Converter MMT - Methylcyclopentadienyl Manganese Tricarbonyl MPa - Megapascal MPFI - Multiport Fuel Injection ms - Millisecond MSFF - Miles Since First Fail MSLF - Miles Since Last Fail MST - Manifold Surface Temperature MTBE - Methyl Tertiary Butyl Ether MTV - Manifold Tuning Valve MV - Megavolt mV - Millivolt MVLPS - Manual Valve Lever Position Sensor MVSA - Motor Vehicle Safety Act MVSS - Motor Vehicle Safety Standards
N NAAO - North American Automotive Operations NAICC - Navigation-Aided Intelligent Cruise Control NC - Normally Closed NCAP - New Car Assessment Program NEG - Negative NFF - No Fault Found NG - Natural Gas NGS - New Generation Star (tester) NHTSA - National Highway Traffic Safety Administration NLGI - National Lubricating Grease Institute N-m - Newton Meters NO - Normally Open NOx - Nitrogen Oxides NPTC - National Pipe Thread Coarse NPTF - National Pipe Thread Fine NVLD - Natural Vacuum Leak Detection NVRAM - Non Volatile Random Access Memory
S SAE - Society of Automotive Engineers SAS - Side Auxiliary Sensor SAVDAS - Stand-Alone Vehicle Data Aquisition System SAW - Spark Angle Word SBDS - Service Bay Diagnostic System SBEC - Single Board Engine Controller (replaced with PCM) SBS - Supercharger Bypass Solenoid SBT - Serial Bus Traveller SC - Supercharger SCA - Supplemental Coolant Additive SCB - Supercharger Bypass SCS - Side Crash Sensor SDARS - Satellite Digital Audio Radio Service SDM - Sensing and Diagnostic Module SDM - Sensor Diagnostic Module SDS - Satellite Discriminating Sensor SDV - Spark Delay Valve SEFI - Sequential Electronic Fuel Injection (replaced with SFI) SEO - Special Equipment Option SES - Service Engine Soon (replaced with MIL) SFI - Sequential Multiport (Electronic) Fuel Injection SHO - Super High Output SIG RTN - Signal Return SIL - Shift Indicator Lamp SIR - Supplemental Inflatable Restraint SIS - Side Impact Sensor SMEC - Single Module Engine Controller (replaced with PCM) SNSR - Sensor SO2 - Sulphur Dioxide SPD - Speed SPL - Smoke Puff Limiter SPOUT - Spark Output SPS - Service Programming System SRC - Selective Ride Control SRG - Solar-Reflective Glass SS - Shift Solenoid ST - Scan Tool ST - Short Term (Fuel Trim) STAR - Self Test Automatic Readout (tester) STAR - Stolen Auto Recovery System STC - Step Timing Control STI - Self Test Input STO - Self Test Output STS - Service Technicians Society SWS - SideWall tension Sensor
T TAB - Thermactor Air Bypass (replaced with AIRB) TAC - Throttle Actuator Control TAD - Thermactor Air Divert (replaced with AIRD) TACH - Tachometer TAP - Transmission Adaptive Pressure TB - Throttle Body TBI - Throttle Body Fuel Injection TC - Turbocharger TCC - Torque Converter Clutch TCIL - Transmission Control Indicator Lamp TCM - Transmission Control Module TCS - Traction Control System TCS - Transmission Control Switch TDC - Top Dead Center TEMP - Temperature TFI - Thick Film Integrated (replaced with DI) TFT - Transmission Fluid Temperature TGS - Top Gear Switch THEMIS - Thermal Management Intelligent System THM - Turbo Hydra-Matic THS - Transmission Hydraulic Switch TIIS - Thermal Imaging Inspection Station TOT - Transmission Oil Temperature TP - Throttle Position TPI - Tuned Port Injection TPM - Tire Pressure Monitor TR - Transmission Range TSA - Thorax Side Airbag TSI - Two Speed Idle TSS - Transmission Speed Sensor TTS - Transmission Temperature Switch (replaced with TOT) TV - Throttle Valve TVS - Thermal Vacuum Switch TVV - Thermal Vacuum Valve TWC - Three Way Catalyst TWC+OC - Three Way Catalyst + Oxidation Catalyst TXV - Thermal Expansion Valve
U UIDI - Up-Integrated Direct Ignition UART - Universal Asynchronous Receiver-Transmitter UD - Underdrive ULEV - Ultra Low Emisions Vehicle USCAR - United States Council for Automotive Research UTOG - Uniform Tire Quality Grading
W WAC - Wide Open Throttle A/C Cutoff W/B - Wheelbase WDS - Worldwide Diagnostic System WOT - Wide Open Throttle WSS - Wheel Speed Sensor WU-OC - Warmup Catalyst with Oxidation Catalyst WU-TWC - Warmup Catalyst with Three Way Catalyst WVVWS - Wireless Vehicle to Vehicle Warning System
