Abbreviations and Acronyms - Microsoft...Abbreviations and Acronyms Every month, the ATRA Technical...

54 GEARS January/February 2007

Abbreviations and Acronyms

Every month, the ATRA Technical Hotline receives a number of calls regarding the various abbreviations used in bulletins, manu-als and training programs. To help make your job easier, we com-piled a list of some of the more common abbreviations used in the automotive industry.

Notice that some of these abbreviations appear more than once. That’s because more than one manufacturer may have cre-

ated its own use for that abbreviation. In that case, you’ll have to consider the context to determine exactly which definition to use.

In addition, many abbreviations appear in lower case type; that’s important, because changing the case changes the mean-ing. For example, ns means nanoseconds, while nS means nano-seimens: Two completely different definitions. Keep that in mind when using any of these abbreviations.

2V Two (Venturi) Valve (two barrel carburetor)2WS Two Wheel Steer3GR Third Gear4GR Fourth Gear4EAT Four speed Electronic Automatic Transmission

4R70W Four speed, Rear wheel drive, (up to) 700 lb/ft torque rated, Wide ratio

4R100 Four speed, Rear wheel drive, (up to) 1000 lb/ft torque rated

4V Four (Venturi) Valve (four barrel carburetor)4WAL Four Wheel Antilock4WAS Four Wheel Air Suspension4WD Four Wheel Drive4WS Four Wheel Steer

5R55W Five speed, Rear wheel drive, (up to) 550 lb/ft torque rated, Wide ratio

AA Amps; AmperesA-6 Axial 6-Cylinder A/C CompressorAALA American Automobile Labeling ActAAT Ambient Air TemperatureAAV AntiAfterburn Valve (Mazda)

ABARS Automobile Backward Automatic Ranging System

ABC Active Body ControlABS Antilock Brake SystemABSV Air Bypass Solenoid Valve (Mazda)AC Alternating CurrentA/C Air ConditioningACC Adaptive Cruise ControlACC Air Conditioning ClutchACC Automatic Climate Controlaccel AccelerationACCS Air Conditioning Cycling Switchaccum Accumulator

accy AccessoryACD Air Conditioning DemandACE Active Cornering EnhancementACL Air CleanerACM Airbag Control ModuleACM Audio Control ModuleACP Air Conditioning PressureACON Air Conditioning On ACR Air Conditioning Relay

ACR4 Air Conditioning Refrigerant, Recovery, Recycling, Recharging

act ActualACT Air Charge TemperatureACTS Air Charge Temperature Sensoractv ActivateACV (Thermactor) Air Control ValveA/D Analog to DigitalAD Accommodated Deviceadapt Adaptiveadapts AdaptersADAS Advanced Driver Assistance SystemADBV AntiDrainBack ValveADC Automatic Distance ControlADG Accommodated Device Gatewayadj AdjustADL Automatic Door LockADS Auxiliary Discriminating SensorADU Analog-Digital UnitAECM Airbag Electronic Control ModuleA/F Air Fuel Ratio (see also AFR)AF Air FuelAFC Air Flow Control; Air Fuel ControlAFCD Advanced Frontal Crash Dummy

54AbbrAcron.indd 5454AbbrAcron.indd 54 1/4/07 4:14:45 PM1/4/07 4:14:45 PM

GEARS January/February 2007 55

Abbreviations and Acronyms

AFCM Alternate Fuel Control ModuleAFECM Alternate Fuel Engine Control ModuleAFM AirFlow MeterAFO Alternate Fuel OperationAFR Air/Fuel Ratio (see also A/F)AFS AirFlow Sensor (Mitsubishi)aft AfterAGSP Auxiliary Gauge Switch PackAGVS Automated Guided Vehicle SystemAHLD Automatic Headlamp Leveling DeviceAHR Active Head Restraintamp hr Amp HoursAHS Active Handling SystemAIM Automotive Interior MaterialAIR Air Injection Reaction (Secondary air injection)AIRB Secondary Air Injection BypassAIRD Secondary Air Injection DiverterAIRM Secondary Air Pump Monitor AIS Automatic Idle SpeedAIS Air Injection System (Chrysler)ALC Automatic Lamp ControlALC Automatic Level ControlALCL Assembly Line Communications Link (DLC)ALDL Assembly Line Data Link (DLC)ALM Adaptive Learn MatrixALR Automatic Locking RetractorAlt AlternativeALT Alternator (GEN)AM Amplitude ModulationAMB AmbientAMM Air Mass Meteramp Amplifi erAMS Automatic Music SearchAMT Automated Manual TransmissionAOD Automatic OverdriveAODE Automatic Overdrive Electronic (transmission)

AODE-W Automatic Overdrive Electronic Wide ratio (transmission)

AOS Automatic Occupant SensingAP Accelerator PedalAPADS Air Conditioning Protection and Diagnostic SystemAPC Automatic Performance ControlAPCM Accessory (or Auxilliary) Power Control ModuleAPECS Advanced Proportional Engine Control SystemAPI American Petroleum InstituteAPO Accessory Power OutletsAPP Accelerator Pedal PositionAPS Absolute Pressure Sensor (GM)APS Atmospheric Pressure Sensor (Mazda)APT Adjustable Part ThrottleARC Active Roll ControlARC Automatic Ride ControlARS Adaptive Receptive System

ARS Automatic Restraint System

ARTHUR Automatic Radio system for Traffi c situations on Highways and Urban Roads

ASA Air Signal AttenuatorASA Automatic Slack AdjusterASARC Air Suspension Automatic Ride ControlASC AntiStall ControlASD Automatic ShutdownASDM Airbag System Diagnostic Module (Chrysler)ASF Audi Space FrameASG Automatic Shift GearboxASM Acceleration Simulation ModeASM Accelerator and Servo control ModuleASM Air Solenoid ModuleASM Alarm Siren Moduleasm AssemblyASR Acceleration Slip RegulationASSYST Active Service SystemASTC Automatic Stability and Traction ControlASTM American Society for Testing and MaterialsA/T Automatic Transmission/TransaxleATC Automatic Temperature ControlATDC After Top Dead CenterATF Active Transfer CaseATF Automatic Transfer CaseATF Automatic Transmission FluidATM Actuator Test ModeAT-PZEV Advanced Technology Partial Zero Emission VehicleATS Air Temperature Sensor (Chrysler)ATSLC Automatic Transmission Shift Lock ControlATTS Advanced Torque Transfer SystemATX Automatic TransaxleAWD All Wheel DriveAWG American Wire GageAYC Active Yaw ControlAXOD Automatic Overdrive TransaxleAXOD-E Automatic Overdrive Transaxle

Bb BAR; Metric Unit of Atmospheric PressureB+ Battery Positive (voltage)BARO Barometric (pressure)BAS Brake Apply SensorBAT BatteryBBV Brake Booster VacuumBCA Bias Control AssemblyBCM Body Control ModuleBECU Body Electronic Control UnitBFC Body Function ControllerBHP Brake HorsepowerBID Breakerless Inductive Discharge (AMC)BLM Block Learn Multiplier (LT FUEL TRIM)B-LVL BilevelBLW Brake Lining Wear



Abbreviations and Acronyms Continued

BMAP Barometric and Manifold Absolute Pressurebn BankBOB BreakOut BoxBOO Brake On/OffBP BackPressureBPA Bypass AirBPCM Battery Pack Control ModuleBPMV Brake Pressure Modulator ValveBPP Brake Pedal PositionBPS Barometric Pressure Sensor (Ford and Nissan)BPT BackPressure TransducerBPW Base Pulse WidthBSFC Brake Specifi c Fuel ConsumptionBSW Black SidewallsBTCM Brake Torque Control ModuleBTDC Before Top Dead CenterBTM Battery Thermal ModuleBTSI Brake Transmission Shift InterlockBtu British Thermal UnitsBV Battery Voltage

CC3I Computer Controlled Coil IgnitionCA Cranking AmpsCAA Canadian Automobile AssociationCAA Clean Air ActCAB Controller, Antilock BrakeCAC Charge Air Cooler

CAFCCompany Average Fuel Consumption (Canada)

CAFE Corporate Average Fuel Economy (USA)cal Calibrationcalc CalculatedCALID Calibration Identifi cationCalif CaliforniaCALPAK Calibration PackageCAMM Computer Aided Manufacturing MeasurementCAMS Computerized Automotive Maintenance SystemCAN Controller Area NetworkCANP Canister Purge (solenoid)CARB California Air Resources Board

CARS Canadian Automotive Repair and Service Council

CAS Crank Angle SensorCASE Crank Angle Sensor Errorcass CassetteCATS Computer Aided Test Suitecc Cubic CentimetersCC Climate ControlCC Coast ClutchCC Cruise ControlCC Catalytic ConverterCCA Cold Cranking AmpsCCC Computer Command Control (GM)

CCCD Catalytic Converter CoolDownCCD Chrysler Collision DetectionCCD Computer Controlled Dwell (Ford)CCDIC Climate Control Driver Information CenterCCEI Coolant Controlled Idle Enrichment (Chrysler)

CCEV Coolant Controlled Engine Vacuum Switch (Chrysler)

CCFL Cold Cathode Florescent LampCCM Central Control ModuleCCM Chassis Control ModuleCCM Comprehensive Component MonitorCCM Convenience Charge ModuleCCO Converter Clutch OverrideCCOT Cycling Clutch Orifi ce TubeCCP Climate Control PanelCCP Controlled Canister Purge (GM)CCRM Constant Control Relay ModuleCCS Climate Controlled SeatCCS Coast Clutch SolenoidCCSM Climate Controlled Seat ModuleCCW CounterClockWiseCD Compact DiscCDA Cylinder DeActivationCDCV Canister Drain Cut ValveCDI Capacitive Discharge Ignition (AMC)CDR Chrysler Diagnostic ReadoutCDR Crash Data RetrievalCDRV Crankcase Depression Regulator ValveCDX Compact Disc ChangerCE Commutator EndCEL Check Engine Lamp (MIL)CEAB Cold Engine Air BleedCEC Crankcase Emission Control System (Honda)CECU Central Electronic Control Unit (Nissan)CEMF Counter Electromotive ForceCEMS Catalyst Effi ciency Management SystemCEMS Carbureted Engine Management SystemCES Clutch Engage SwitchCESS Cold Engine Sensor SwitchCEX Cabin ExchangerCFC Chlorofl uorocarbonsCFI Central Fuel Injection (TBI)CFI Continuous Fuel InjectionCFI CrossFire Injectioncfm cubic feet per minuteCG Center of GravityCHMSL Center High Mounted Stop LampCID Component Identifi cationCID Cubic Inch DisplacementCID Cylinder Identifi cation (Ford)CIS Continuous Injection System (Bosch)CJC Collision Judgment Coeffi cientCKP Crankshaft Position



CKP REF Crankshaft ReferenceCKT CircuitCL Closed LoopCLC Converter Lockup Clutch (TCC)CLCC Closed Loop Carburetor ControlCLS Coolant Level SwitchCLTBI Closed Loop Throttle Body InjectionCLYC Closed Loop Yaw ControlCLNT Coolantcm3 Cubic CentimetersCMC Compressor Motor Controllercmd Commandcmdd CommandedCMFI Central Multiport Fuel InjectionCMP Camshaft PositionCMP REF Camshaft ReferenceCMVSS Canadian Motor Vehicle Safety StandardsCNG Compressed Natural GasCO Carbon MonoxideCO2 Carbon Dioxide

COBDIMR Customer On-Board Diagnostics Inspection/Maintenance Readiness

COMBATT Commercially Based Tactical Truckcombo CombinationCOMDC Commanded Duty Cyclecomm Communicationcond Conditionconst ConstantCOP Coil On PlugCOP Computer Operating ProperlyCP Canister Purge (GM)CP Crankshaft Position Sensor (Ford)CPA Connector Position AssuranceCPC Camshaft Position ControlCPI Central Port Injection (GM)CPL Control Parts ListCPM Cellular Phone ModuleCPP Clutch Pedal PositionCPS Cam Profi le SwitchingCPS Center Panel SwitchesCPS Central Power SupplyCPS Childseat Positioning SensorCPU Central Processing UnitCRR Cool Running RotorCRT Cathode Ray TubeCRTC Cathode Ray Tube ControllerCRTS Continuously Regenerating Trap SystemCS Charging SystemCSC Coolant Spark Control (Ford)CSE GND PCM Case GroundCSFI Central Sequential Fuel InjectionCSI Compression Sense IgnitionCSM Central Security Module

CSSA Cold Start Spark Advance (Ford)CSSH Cold Start Spark Hold (Ford)cSt CentistokesCSTO Compression Sense Time-OutCTAV Cold Temperature Actuated Vacuum (Ford)CTD Content Theft DeterrentCTM Central Timer ModuleCTO Clean Tachometer OutputCTO Coolant Temperature Override Switch (AMC)CTOX Continuous Trap OxidizerCTP Closed Throttle Position (switch)CTS Coolant Temperature SensorCTS Charge Temperature Switch or SensorCTVS Choke Thermal Vacuum SwitchCV Constant VelocityCVCC Compound Vortex Controlled Combustion (Honda)CVN Calibration Verifi cation NumberCVR Control Vacuum Regulator (Ford)

CVRSS Continuously Variable Road Sensing Suspension

CVRTD Continuously Variable Real Time DampingCVS Canister Vent SolenoidCVT Continuously Variable Transmission, TransaxleCW ClockWiseCWS Continental Wheel SystemCZS Crash Zone Sensor

DDAB Delayed Accessory BusDAB Driver AirBag (module)DART Diagnostic And Reprogramming TooldB DecibelsdBA decibels on A-weighted scaleDBB Dual Bed BeadDBM Dual Bed MonolithDC Direct CurrentDC Duty CycleDCCSM Dual Climate Controlled Seat ModuleDCL Data Communication LinkDCM Door Control ModuleDDM Driver’s Door ModuleDDS Defl ection Detection SystemDDS Driver’s Door SwitchDE Drive Enddec DecrementDEC Digital Electronic ControllerDEFI Digital Electronic Fuel Injection (Cadillac)ºC Degrees CelsiusºF Degrees FahrenheitDEPS Digital Engine Position SensorDERM Diagnostic Energy Reserve Module (GM)des DesiredDFCO Deceleration Fuel CutOffDFI Direct Fuel Injection




DFS Deceleration Fuel Shutoff (Ford)DGI Direct Gasoline InjectionDI Distributor IgnitionDIC Driver Information Centerdiff DifferentialDIM Dashboard Integration Moduledis DisableDIS Direct (Distributorless) Ignition System (EI)DIS Distributorless Ignition System (Ford)disc DisconnectDISI Direct Injection, Spark IgnitionDIST DistributorDIY Do It YourselfDLC Data Link ConnectorDLC Diamond Logic ComputerDMCM Driver Motor Control ModuleDMM Digital MultiMeterDMSD Drive Motor Speed and DirectionDOHC Dual Overhead CamDNR Dolby Noise ReductionDOL Data Output Line/LinkDPFE Differential Pressure Feedback EGRDPI Dual Plug InhibitDRB Diagnostic Readout BoxDRBII Diagnostic Readout Box, Version 2DRCV Distributor Retard Control ValveDRF Deactivating Roller FollowerDRL Daytime Running LampsDRR Digital Radio ReceiverDRW Dual Rear WheelDSCC Distance Sensing Cruise ControlDSDA Dual Stage Driver AirbagDSI Dual Stage Infl atorDSM Driver’s Seat moduleDSO Digital Storage OscilloscopeDSP Digital Signal ProcessDSPA Dual Stage Passenger AirbagDSS Downshift SolenoidDSSA Dual Signal Spark Advance (Ford)DSST Dunlop Self Supporting TireDTC Diagnostic Trouble CodeDTM Diagnostic Test ModeDTR Digital Transmission RangeDTT Diesel Transmission TechnologiesDVDSV Differential Vacuum Delay and Separator ValveDVDV Distributor Vacuum Delay ValveDVOM Digital Volt-Ohmmeter

EE4OD Electronic 4-Speed OverdriveE85 Ethanol 85 percentEA Electronic AcceleratorEAC Electronic Air Control (AIR)

EACV Electronic Air Control Valve (Honda)EAIR Electronic (Secondary) Air Injection ReactionEAS Electrically Assisted SteeringEAS Electronic Air Switching EATC Electronic Automatic Temperature ControlEBC Electronic Brake ControlEBCM Electronic Brake Control ModuleEBD Electronic Brake force DistributionEBM Electronic Brake Module; Electronic Body ModuleEBP Exhaust BackPressureEBTCM Electronic Brake and Traction Control ModuleEC Electrical CenterEC Electronic Control; Engine ControlE&C Entertainment and ComfortECA Electronic Control AssemblyECC Electronic Climate Control

ECCS Electronic Concentrated Control System (Nissan)

ECD Electronically Controlled DecelerationECI Extended Compressor at IdleECL Engine Coolant LevelECM Electronic Control ModuleECM Engine Control ModuleECS Electronic Crash SensorECS Emission Control SystemECS Evaporation Control System (Chrysler)ECT Engine Coolant Temperature (Switch, Sensor)ECU Electronic Control UnitEDF Electric Drive Fan (relay)EDIS Electronic Direct Ignition System (EI)EDR Event Data Recorder

EDSR Electronic Dealer Service (Investigation) Report

EEC Electronic Engine Control (Ford)EEC Evaporative Emission Controls (Ford)EECS Evaporative Emission Control System (GM)EEDS Electric-Electronic Distribution System

EEPROM Electronically Erasable Programmable Read Only Memory

EEVIR Evaporator Equalized Valves In ReceiverEFC Electronic Feedback Carburetor (Chrysler)EFC Electronic Fuel ControlEFCA Electronic Fuel Control Assembly (Ford)EFE Early Fuel EvaporationEFI Electronic Fuel Injection

EFTA Engine Fuel Temperature Bank 1 Input (degrees)

EFTA V Engine Fuel Temperature Bank 1 Input Volts EFTB Engine Fuel Temperature Bank 2 Input (degrees) EFTB V Engine Fuel Temperature Bank 2 Input Volts EGC Electronic Gauge ClusterEGO Exhaust Gas Oxygen (O2S)EGOG EGO GroundEGR Exhaust Gas Recirculation



EGRB EGR Boost SensorEGRBARO Enable BARO Read instead of EGR pressureEGRC Exhaust Gas Recirculation ControlEGRCMDS EGR Motor Commanded in Steps EGRMC1 EGR Motor Control Output Command 1EGRMC2 EGR Motor Control Output Command 2EGRMC3 EGR Motor Control Output Command 3EGRMC4 EGR Motor Control Output Command 4EGRPS EGR Valve Position Sensor (Mazda)EGRT Exhaust Gas Recirculation Temperature (switch)

EGR TVV Exhaust Gas Recirculation Thermal Vacuum Valve

EGRV Exhaust Gas Recirculation Vent EGRVR EGR Valve Vacuum ControlEGR-5V EGR Solenoid Valve (Mazda)EGTS Exhaust Gas Temperature Switch (EGRT)EGRTV EGR Thermo Valve (Chrysler)EHB Electro-Hydraulic BrakeEHCU Electronic Hydraulic Control UnitEHOC Electrically Heated Oxidation CatalystEHPA Electro-Hydraulic Power AssistEHPAS Electro-Hydraulic Power Assisted SteeringEHPS Electro-Hydraulic Power SteeringEHTWC Electrically Heated Three-Way Catalyst

EI Electronic Ignition (includes Distributorless Ignition System, formerly DIS)

ELB Electronic Lean Burn (Chrysler)ELC Electronic Level ControlEM Energy ManagementEM Engine Modifi cationEMAS Engine Management and Analysis SystemEMAT Electro-Mechanical Automatic TransmissionEMB Electromagnetic BrakesEMB Electro-Mechanical BrakeEMCC Electronically Modulated Converter ClutchEMF ElectroMotive Force (voltage)EMI ElectroMagnetic InterferenceEMR Electronic Module RetardEMR Emission Maintenance ReminderEOBD Enhanced On-Board DiagnosticsEOP Engine Oil PressureEOS Exhaust Oxygen SensorEOT Engine Oil TemperatureEOTF Engine Oil Temperature Fault Detection EOT V Engine Oil Temperature VoltsEP Exhaust PressureEPA Environmental Protection AgencyEPACT Energy Policy ActEPC Electronic Pressure Control EPHS Electrically Powered Hydraulic SteeringEPOS EGR Valve Position Sensor (Ford)EPR Exhaust Pressure RegulatorEPROM Erasable Programmable Read Only Memory

ESA Electronic Spark Advance (Chrysler)EPS Electric Power SteeringEPS Electric Power SteeringEPS Engine Position SensorEPT EGR Pressure Transducer (PFE)ERH Extended Ride HeightESB Energy Storage BoxESB Expansion Spring BrakeESC Electrical Systems ControllerESC Electronic Spark Control (GM)ESC Electronic Suspension ControlESC Extended Service ContractESCM Energy Storage Control ModuleESD Electrostatic DischargeESM Electronic Steering ModuleESN Electronic Serial NumberESO Engine ShutOffESOF Electronic Shift On-the-FlyESP Electronic Stability ProgramESS Electronic Shift SchedulingESS Electronic Spark Selection (Cadillac)EST Electronic Spark TimingETBE Ethyl Tertiary Butyl EtherETC Electronic Temperature ControlETC Electronic Throttle ControlETC Electronic Timing ControlETCC Electronic Touch Climate ControlETR Electronically Tuned ReceiverETS Enhanced Traction SystemEUDC Extra-Urban Driving Cycle

EUDC-LP Extra-Urban Driving Cycle for Low Power vehicles

EV Electric VehicleEVA Electronic Vibration AnalyzerEVAP Evaporative EmissionEVAPCPF Evaporative Emissions Canister Purge Fault

EVAPCV Evaporative Emissions Canister Purge Vent Control

EVAPCVF Evaporative Emissions Canister Purge Vent Fault

EVAPPDC Evaporative Emissions Canister Purge Control %EVAPPF Evaporative Purge Flow Input VOLTSEVIC Electronic Vehicle Information CenterEVMV Electric Vapor Management ValveEVO Electronic Variable Orifi ceEVP EGR Valve Position Sensor (Ford)EVR EGR Vacuum Regulator

EVRV Electronic Vacuum Regulator Valve for EGR (GM)

EVTOP Enhanced Tactical Vehicle Occupant Protection

EVTM Electrical and Vacuum Troubleshooting Manual

EWMA Exponentially Weighted Moving AverageEX; EXH Exhaust




FF FaradF4WD Full Time Four Wheel DriveFABS Flexible Auto Body SystemFAF Fan Air FlowFANDC Variable Speed Fan Duty Cycle %FANVARF Variable Speed Fan Output Fault FBC Feedback Carburetor (Ford and Mitsubishi)FC Fan Control; Friction CurveFCA Fuel Control Assembly (Chrysler)FCM Front Control ModuleFCP Fuel Cell PartnershipFCS Fuel Control Solenoid (Ford)FCU Front Control UnitFCV Fuel Cell VehicleFDBK FeedbackFDC Fuel Data CenterFDC Fuel Deceleration Valve (Ford)FEAD Front End Accessory Drive beltFED Federal (except California)FEDS Fuel Enable Data StreamFEDS Flexible Engine Diagnostic System

FEEPROM Flash Electronically Erasable Programmable Read Only Memory

FEIC Fuel Economy Integrated CounterFET Field Effect TransistorFEX Front ExchangerFF Flexible FuelFFCRS Front-Facing Child Restraint SystemFFFP Fuel-Flexible Fuel ProcessorFFH Fuel Fired HeaterFFS Fine-blanking and Finishing SystemFFS Flexible Fuel SensorFFV Flexible Fuel VehicleFFWS Fuel Filter Water SeparatorFI Fuel InjectionFICM Fuel Injector Control ModuleFIDO Flame Ionization Detector OptimizationFIM Fuel Indicator ModuleFIPL Fuel Injection Pump LeverFIPT Fuel Inlet Pressure TestFL Front LeftFLI Fuel Level IndicatorFLI V Fuel Level Indicator Input VOLTS FLO Fast Light-Offfl r FloorFLS Fluid Level Sensor (GM)FLVV Fill Limit Vent ValveFM Frequency ModulationFMEM Failure Mode Effects ManagementFMVSS Federal Motor Vehicle Safety StandardsFP Fuel PumpFPCM Fuel injection Pump Control Module

FPDM Fuel Pump Driver ModuleFPF Fuel Pump Output Fault FPM Fuel Pump MonitorFPR Fuel Pump RegulatorFPRC Fuel Pressure Regulator Control

FPROM Flash Erasable Programmable Read Only Memory

FPS Fast Pass StandardFPSM Fuel Pump Secondary MonitorFPV Ford Performance VehiclesFR Front Right

FRACAS Failure Reporting And Corrective Action System

FRC Forcedfreq Frequencyfrnt FrontFRP Fuel Rail PressureFRS Face Recognition SystemFRV First Response VehicleFSA Field Service ActionFSDI Four-Stroke, Direct InjectionFSI Fuel Straight InjectionFSS Forward Sensing SystemFSVF Fuel Solenoid Valve Fault FSVM Fuel Solenoid Valve Secondary Monitor FT Fuel Trimft-lb Foot PoundFTL Fuel Tank Level SensorFTO Filtered Tachometer OutputFTP Federal Test ProcedureFTP Fuel Tank PressureFTPT Fuel Tank Pressure TransducerFUDC Federal Urban Driving CycleFUELPW1 Injector Pulse Width Bank 1 FUELPW2 Injector Pulse Width Bank 2 FW Flat Wirefwd ForwardFWD Front Wheel Drive

GGA GaugeGA Gravitational AccelerationGAWR Gross Axle Weight RatingGCM Governor Control ModuleGCR Global Concern ReportGCW Gross Combined Weightg/cyl Grams per CylinderGCWR Gross Combined Weight RatingGDI Gasoline Direct InjectionGEN GeneratorGENF Generator Output Fault GENFDC Generator Field Control OutputGEM Gasoline Engine ManagementGEM Generic Electronic Module



GFS Generator Field Signal GGT Gas Guzzler TaxGHG GreenHouse GasGISMO Geographic Information System, MobileGND GroundGOVN Governor ModuleGPCM Glow Plug Control ModuleGPS Global Positioning SystemGS Garage Shiftg/s Grams Per Secondg/sec Grams Per SecondGTL Gas To LiquidGVW Gross Vehicle WeightGVWR Gross Vehicle Weight Rating

HH or H2 HydrogenH2DI Hydrogen Direct InjectionH2O WaterHAIS Heated Air Intake System (Chrysler)HAST High Accelerated Stress TestHBA Hydraulic Brake AssistHBU Hub Bearing UnitHC HydrocarbonsHCCI Homogeneous-Charge, Compression IgnitionHCM Heating Control ModuleHCM Hybrid Control ModuleHCU Hydraulic Control UnitHCV Heavy Commercial VehicleH/CMPR High CompressionHD Heavy DutyHDC Heavy Duty CoolingHDGV Heavy Duty Gasoline-fueled VehicleHDR High Data RateHD-UDDS

Heavy Duty Urban Dynamometer Driving Schedule

HEC Hybrid Electronic ClusterHEDF High Speed Electro Drive Fan (relay or circuit)HEGO Heated Exhaust Gas Oxygen (sensor) (HO2S)HEGOG HEGO Ground (circuit)HEI High Energy Ignition (GM)HEPS Hydraulic Electric Power Steering

HEUI Hydraulic-actuated Electronically-controlled Unit Injector

HEV Hybrid Electric Vehicle HFC High Fan Control/ClutchHFC Hydraulic Fading CompensationHFCF High Speed Fan Control Fault HFM Hot Film MeterHFP High Fuel PumpHg MercuryHi Alt Hi AltitudeHID High Intensity DischargeHIS Horizontal Impact Sensor

hist HistoryHLDT Heavy Light-Duty TruckHLOS Hardware Limited Operating StrategyHO High OutputHO2S Heated Oxygen SensorHO2S1 Upstream Heated Oxygen SensorHO2S2 Up or Downstream Heated Oxygen SensorHO2S3 Downstream Heated Oxygen Sensorhp HorsepowerHPDI High Pressure Direct InjectionHPL High Pressure LiquidHPP High Pressure PumpHPS Head Protection SystemHPS High Performance SystemHPV High Pressure VaporHPVS Heat Pump Ventilation SystemHRC Headlamp Range ControlHSA Head Side AirbagHSC High Swirl CombustionHSCDS High-Sensitivity Collision Detection SystemHSDI High-Speed Direct InjectionHSE High-Speed EnrichmentHSEA High Solar Energy Absorbing (glass)

HTCM Heating-ventilation-air-conditioning Thermal Control Module

HTR11 Bank 1 Upstream O2S Heater Control HTR11F Bank 1 Upstream O2S Heater Circuit Fault HTR12 Bank 1 Downstream O2S Heater Control HTR12F Bank 1 Downstream O2S Heater Circuit Fault HTR21 Bank 2 Upstream O2S Heater Control HTR21F Bank 1 Downstream O2S Heater Circuit Fault HTR22 Bank 2 Downstream O2S Heater Control HTR22F Bank 1 Downstream O2S Heater Circuit Fault HTRX1 O2 Sensor Upstream Heater Control HTRX2 O2 Sensor Downstream Heater ControlHUD Heads-Up DisplayHUD Heads-Up DisplayHVAC Heating, Ventilation and Air Conditioning

HVACM Heating, Ventilation and Air Conditioning Module

HVI High Viscosity IndexHVIL High Voltage Interlock LoopHVM Heater Vent ModuleHVS High Voltage SwitchHW Heated WindshieldHWFET Highway Fuel Economy Test (driving schedule)HYPAS Hydraulic Power Assisted SteeringHz Hertz

IIA Intake AirIABM Integrated AirBag ModuleIAC Idle Air ControlIACV Idle Air Control Valve




IAFM Integrated Air Fuel ModuleIAFS Integrated Air Fuel SystemIAT Intake Air TemperatureiATN International Automotive Technicians NetworkIATS Intake Air Temperature Sensor (Mazda)IBOB Intelligent BreakOut BoxIC Ignition ControlIC Integrated CircuitICA Injector Cam ActuationICC Intelligent Cruise ControlICCS Integrated Chassis Control SystemICDX Integrated Compact Disc ChangerICE Internal Combustion EngineICM Ignition Control ModuleICP Injection Control PressureICS Idle Control Solenoid (GM)ICS Integrated Chassis SystemICWS Intersection Collision Warning SystemID Identifi cationID Inside DiameterIDI Integrated Direct IgnitionIDIS International Dismantling Information SystemIDL Idle Position SwitchIDM Ignition Diagnostic Monitor/ModuleIDM Injector Driver ModuleIDS Integrated Diagnostic Software

IEDIS Integrated Electronic Distributorless Ignition System

IFES Integrated Front End SystemIFI Indirect Diesel InjectionIFS Inertia Fuel ShutoffIFSM Integrated Fuel System ModuleIGN IgnitionILC Idle Load CompensatorILEV Inherently Low Emission Vehicleillum IlluminationI/M Inspection MaintenanceIMA Integrated Motor AssistIMDX Integrated Mini Disc ChangerIMLUT Inspection/Maintenance Look-Up Tableimmo ImmobilizerIMPR In-use Monitor Performance RatioIMRC Intake Manifold Runner ControlIMRC F Intake Manifold Runner Control Fault (Yes/No)

IMRCM Intake Manifold Runner Control Monitor Input Bank 1 Volt

IMRCM2 Intake Manifold Runner Control Monitor Input Bank 2 Volts

IMS Inductive Magnetic SaturationIMS Instant Mobility SystemIMSC Intake Manifold Swirl Control IMSC F Intake Manifold Swirl Control Fault IMT Intake Manifold TuningIMTD Intake Manifold Temperature Differential

IMTV Intake Manifold Tuning Valve Control % IMTVF Intake Manifold Tuning Valve Fault in Inch; Inchesinadv Inadvertentinc IncrementINCA In-Car Acquisitionincand Incandescentinfl Infl atableinit InitialINJ InjectionINJ InjectorINJ1F-8F Fuel Injector Primary Fault Cylinders 1 thru 8 INJ9F-lOF Fuel Injector Primary Fault Cylinders 9 and 10 INP Inputinst Instantint InteriorINT Integrator (ST FUEL TRIM)I/O In/OutIOC Instant Oil ChangeI/P Instrument PanelIPC Instrument Panel ClusterIPEC Instrument Panel Electrical CenterIPM Instrument Panel ModuleIPM Integrated Power ModuleIPR Injector Pressure RegulatorIRDS Independent Rear Drive SuspensionIRQ Interrupt RequestIRS Independent Rear SuspensionISA Integrated Starter-AlternatorISAD Integrated Starter-Alternator DamperISB Interact System BISC Idle Speed ControlISG Integrated Starter-GeneratorISI Ion Sensing IgnitionISO Interior Systems OptimizationISO International Standards Organizationiso IsolationISS Input Shaft Speed

ITARDA Institute for Traffi c Accident Research and Data Analysis

ITTB Idle Time To BoilITTR Infl atable Tubular Torso RestraintITS Idle Tracking SwitchIVC Integral Vapor CanisterIVCS Integrated Vehicle Control SystemIVI Intelligent Vehicle InitiativeIVIS In Vehicle Information SystemIVS Idle Validation SwitchIVSC Integrated Vehicle Speed ControlIWC Inertia Weight Class

JJARI Japan Automotive Research InstituteJAS Jet Air System (Mitsubishi)



JTEC Jeep, Truck Engine ControlJTEC Joint Transmission-Engine Controller

KKAM Keep Alive MemoryKAPWR Keep Alive powerKDD Keyboard Display Driverkg Kilogramkg/h Kilograms per HourkHz Kilohertzkm Kilometerkm/h Kilometers per Hourkm/l Kilometers per LiterKOEC Key On Engine CrankingKOEO Key On Engine OffKOER Key On Engine RunningkPa KilopascalKS Knock SensorKSM Knock Sensor ModuleKS1 V Knock Sensor Input Bank 1 Volt KS2 V Knock Sensor Input Bank 2 Volts kV Kilovolts

LL Liter; LitersL4 Four Cylinder Inline EngineLATCH Lower Anchors and Tethers for CHildrenLB Long Box, Long Bedlb-ft Pound-FeetLCD Liquid Crystal DisplayLCM Lighting Control ModuleLDCL Left Door Control LockingLDCM Left Door Control ModuleLDDT Light Duty Diesel TruckLDGT Light Duty Gasoline (fueled) TruckLDM Lamp Driver ModuleLDP Leak Detection PumpLDR Low Data Ratelduty Light DutyLEADER Low Emissions Advanced Engine RangeLED Light Emitting DiodeLEP Light Emitting PolymerLEV Low Emissions VehicleLF Left FrontLFC Lamp Fault CodeLFC Low Fan Control/ClutchLFCF Low Speed Fan Control Fault LFCS Low Flow Cooling SystemLFP Low Fuel pumpLFWS Left Front Wheel SpeedLGM Lift Gate ModuleLH Left HandLIE Laterally Inclined EngineL/M Liters Per Minute

lm LumensLMD Left Mid DoorLNG Liquid Natural GasLO LowLOMA Lifter Oil Manifold AssemblyLONGFT1 Long Term Fuel Trim Bank 1 % LONGFT2 Long Term Fuel Trim Bank 2 %LOS Limited Operation StrategyLPA Low Pressure AccumulatorLPG Liquefi ed Petroleum GasLPM Liters Per MinuteLPO Limited Production OptionLPS Low Pressure SensorLR Left RearLR Loaded RadiusLRA Latching Rocker ArmLRD Left Rear Doorlrn LearnLSD Limited Slip Differential LSEGR Linear Solenoid Exhaust Gas RecirculationLSP and BV

Load Sensing Proportioning and Bypass Valve

LSS Linear Shift SolenoidLSUV Luxury Sport Utility VehicleLT LeftLT Long Term (Fuel Trim)LTA Low Temperature AftercoolingLTD Long-Travel Dampened (clutch)LT FT Long Term Fuel TrimLTPI Low Tire Pressure IndicatorLTPWS Low Tire Pressure Warning SystemLUS LockUp Solenoid (see TCC)LV8 Load Variable 8 CylinderLVDT Linear Variable Differential TransducerLVL LevelLWB Long WheelBase (see LB)

MMAF Mass AirFlow (sensor)malf MalfunctionMALL Multifunction Alarm Lighting and LockingMAN ManufacturerMAP Manifold Absolute Pressure MAT Manifold Air TemperatureMC Measuring CoreMC Mixture ControlMCM Message Center ModuleMCS Mixture Control Solenoid (GM)MCT Manifold Charge Temperature (Ford)MCU Microprocessor Control UnitMD Mini DiscMD Modulated DisplacementMDP Manifold Differential PressureMDS(2) Mopar Diagnostic System




MDX Mini Disc ChangerMECS Mazda Electronic Control Systemmed MediumMEM MemoryMEMCAL Memory CalibrationMFC Medium Speed Fan Control ON/OFF MFCF Medium Speed Fan Control Fault YES/NOMFI Multiport Fuel InjectionMGMT ManagementMIC Mechanical Instrument ClusterMID MidrangeMID Monitor Identifi cationMIL Malfunction Indicator LampMIN MinimumMIN MinuteMIN Mobile Identifi cation NumberMIP Mixer Inlet PressureML Manual LongitudinalMLP Manual Lever Position (sensor)MLPS Manual Lever Position Sensormm Millimetermm3 Cubic Millimeter(s)MMC Manifold Mounted ConvertermmHg Millimeters of Mercury MMM Memory Mirror Module mod Module mon Monitor MPa MegapascalMPFI Multiport Fuel InjectionMPG Miles Per GallonMPH Miles Per HourMPI MultiPort Injectionms MillisecondMSFF Miles Since First FailMSLF Miles Since Last Fail MSM Memory Seat ModuleMSO Mixed Signal OscilloscopeMSRP Manufacturers Suggested Retail PriceMST Manifold Surface TemperatureMSVA Magnetic Steering Variable Assist M/T Manual Transmission/TransaxleMTBE Methyl Tertiary Butyl EtherMTBF Mean Time Between FailuresMTV Manifold Tuning ValveMV MegavoltmV MillivoltMVLPS Manual Valve Lever Position SensorMVSA Motor Vehicle Safety ActMVSS Motor Vehicle Safety StandardsMY Model Year

NNAAO North American Automotive Operations

NAES North American Export SalesNAICC Navigation-Aided Intelligent Cruise ControlNC Normally ClosedNCAP New Car Assessment ProgramNDH Navigation Display HeadNDS Neutral Drive SwitchNEG NegativeNEU NeutralNFF No Fault FoundNG Natural Gas

NGSNew Generation STAR (Self Test Automatic Readout)

NGSC Next Generation Speed ControlNGV Natural Gas VehicleNGV New Generation VehicleNGVM Natural Gas Vehicle ModuleNHTSA National Highway Traffi c Safety AdministrationNI Neutral Idle NiMH Nickel Metal Hydride NLGI National Lubricating Grease InstituteNm Newton MetersNO Normally OpenNOx Nitrogen OxidesNoVRAM Non-Volatile Random Access MemoryNPF No Problem FoundNPS Neutral Pressure SwitchNPTC National Pipe Thread CoarseNPTF National Pipe Thread FinenS NanoSiemensNSBU Neutral Safety BackUpNV Night Vision NVH Noise, Vibration and HarshnessNVLD Natural Vacuum Leak DetectionNVRAM Non-Volatile Random Access MemoryNYCC New York City Cycle

OO2 OxygenO2S Oxygen Sensor

OASIS Online Automotive Service Information System

OASIS Organization for the Advancement of Structured Information Standards.

OBD On-Board DiagnosticsOBD-I On-Board Diagnostics, Generation 1OBD-II On-Board Diagnostics, Generation 2OC Oxidation CatalystOC Oxidation Converter (GM)OCC Output Circuit CheckOCR Oil Control RingOCS Overrun Clutch SolenoidOCS Opportunity Charge StationOCT ADJ Octane Adjust FuelOD Outside DiameterOD Overdrive



ODM Output Drive ModuleODM Output Device MonitorODO OdometerOE Original EquipmentOEM Original Equipment ManufacturerOHC Overhead CamshaftOL Open LoopOLED Organic Light Emitting DiodeOPR Over-Pressure ReliefO/R Overrun ClutchORC Oxidation Reduction ConverterORC Occupant Restraint ControllerORVR On-board Refueling Vapor Recovery OS Oxygen SensorOSAC Orifi ce Spark Advance Control (Chrysler)OSC Output State CheckOSC Output State ControlOSGI Open-Service Gateway InterfaceOSM Output State MonitorOSS Output Shaft SpeedOTC Overhead Trip ComputerOTIS Overhead Travel Information SystemOTM Output Test Monitor

TPAB Passenger Air BagPADS Passenger Airbag Disarm SwitchPA Pressure Air (Honda)PAFS Pulse Air Feeder System (Chrysler)PAG PolyAlkylene GlycolPAG (Ford) Premier Automotive GroupPAIR Pulsed Secondary Air InjectionPASE PAssive Start and Entry systemPASM Porche Active Steering ManagementPASS PassengerPASS Personalized Automotive Security SystemPATS Passive AntiTheft SystemPB; P/B Power BrakesPC Pressure ControlPCB Printed Circuit BoardPCI Programmable Communications InterfacePCI Programmable Controller InterfacePCM Power Control ModulePCM Powertrain Control ModulePCS PreCrash SensorPCS Pressure Control SolenoidPCV Positive Crankcase VentilationPDC Park Distance ControlPDC Parts Distribution CenterPDC Power Distribution CenterPDS Passenger Door Switch PDS Portable Diagnostic SoftwarePDV Parcel Delivery Van

P/E Power EnrichmentPEB Power Electronics BayPECB Power Enrichment Control ValvePEM Proton Electric MembranePEMFC Proton Exchange Membrane Fuel CellPEP Peripheral Expansion PortPF Purge FlowPFE Pressure Feedback EGRPFI Port Fuel InjectionPFS Purge Flow Sensor

PGM-FI Programmed Gas Management Fuel Injection (Honda)

PHEV Plug-in Hybrid Electric VehiclePHT Parallel Hybrid TruckPID Parameter Identifi cationPIM Power Inverter ModulePIP Profi le Ignition Pickup (CKP)PKE Passive Keyless EntryPLL Phase Locked Loop PM Permanent MagnetPMD Pump Mounted DriverPMV Pressure Modulator Valve P/N Part NumberPNP Park/Neutral Position (switch)POA Pilot Operated Absolutepos Position POS PositivePOT PotentiometerP-PC Pocket Personal Computerppm Parts Per MillionPPS Passenger Presence SensorPRNDL Park Reverse Neutral Drive Low PROM Programmable Read Only MemoryPROX PReferential OXidationPS Power SteeringPSA Pressure Switch AssemblyPSCM Passenger Seat Control ModulePSCM Power Steering Control ModulePSD Power Sliding Doorpsgr Passenger psi Pounds Per Square Inchpsia Pounds Per Square Inch Absolutepsig Pounds Per Square Inch GaugePSIR Passenger Supplemental Infl atable RestraintPSM Passenger Seat ModulePSM Pressure Switch Manifold

PSOM Programmable Speedometer/Odometer Module

PSP Power Steering PressurePSV Public Service Vehiclept PintPTC Pending Trouble CodePTC Positive Temperature Coeffi cient




PTO Power TakeOffPTOX Periodic Trap OxidizerPTU Part Throttle UnlockPVA Ported Vacuum AdvancePVS Ported Vacuum SwitchPWM Pulse Width ModulationPWR PowerPZEV Partial Zero Emission VehiclePZM Platform Zone Module

QQDM Quad Driver ModuleQDR Quality, Durability, Reliabilityqt QuartQVM Qualifi ed Vehicle Modifi er

RR/A Resume or Accelerate RABS Rear Antilock Brake SystemRAC Remote Accessory Controller RAM Random Access MemoryRAM Ride Air ModuleRAM Remote Antitheft ModuleRAP Retained Access PowerRAV Remote Activation Verifi cationRBC Rotary Blade CouplingRCC Rear Climate Control RCC Remote Climate ControlRCDLR Remote Control Door Lock ReceiverRDCM Right Door Control Module RDM Rear Door Module RDS Radio (broadcast) Data SystemRDS Radio Display System rec Receive recal Recalibrate, Recalibration RECIS Remote Entry Control and Immobilizer SystemREDOX Reduction Oxidation Catalytic ConverterREEGR Rotary Electric EGRREF ReferenceREM Rear Electronic ModuleRESC Remote Emergency Satellite UnitREX Rear ExchangerRF Radio FrequencyRF Right FrontRFA Remote Function Actuator RFF Roller Finger FollowersRFI Radio Frequency InterferenceRFID Radio Frequency Identifi cationRFWS Right Front Wheel Speed RH Right Hand RIM Radio Interface ModuleRIM Rear Integration ModuleRKE Remote Keyless EntryRly Relay

RM Relay ModuleRMD Right Mid Door ROM Read Only MemoryRPA Rear Parking Assist RPM Remote Power ModuleRPM Revolutions Per MinuteRPO Regular Production OptionR&R Remove and ReplaceRR Right RearRRD Right Rear Door RSA Rear Seat Audio RSC Roll Stability ControlRSS Reverse Sensing SystemRSS Road Sensing Suspension R/T Road/TrackRT RightRTC Real—Time Clock RTD Real-Time DampeningRTN ReturnRTT Reconfi gurable Telltale RTV Room Temperature VulcanizingRV Recreational VehicleRVAC Rear Video/Audi/HVAC ModuleRVP Reid Vapor PressureRWAL Rear Wheel AntiLockRWD Rear Wheel DriveRWS Rear Wheel Steer

SS SiemensS4WD Selectable Four Wheel DriveSAE Society of Automotive EngineersSAF Stabilized Aluminum FoamSAS Side Auxiliary SensorSATC SemiAutomatic Temperature Control moduleSAVDAS StandAlone Vehicle Data Acquisition SystemSAVM Spark Advance Vacuum ModulatorSAW Spark Angle Word SB Short Box, Short BedSBDS Service Bay Diagnostic SystemSBEC Single Board Engine Controller (PCM)SBM Standard Body Module SBS Supercharger Bypass SolenoidSBT Serial Bus TravelerSC SuperchargerSCA Supplemental Coolant AdditiveSCB Supercharger BypassSCC Spark Control Computer (Chrysler)SCCA Sports Car Club of AmericaSCI Serial Communications InterfaceSCIL Steering Column/Instrument panel LightingSCM Seat Control ModuleSCP Standard Corporate Protocol



SCS Side Crash SensorSCTM Seatbelt Timer Control ModuleSCV Speed Controlled Volume SDARS Satellite Digital Audio Radio SystemSDI Saab Direct IgnitionSDL Serial Data Link SDM Sensing Diagnostic Module SDRS Satellite Digital Receiver SystemSDS Satellite Discriminating SensorSDS Shock Dampening SystemSDV Spark Delay ValveSEFI Sequential Electronic Fuel Injection (SFI)SEMA Specialty Equipment Market AssociationSEO Special Equipment OptionSES Service Engine Soon (MIL)SFI Sequential (multiport) Fuel InjectionSGCM Starter/Generator Control ModuleSHO Super High OutputSI System InternationalSIAB Side Impact Air BagSIACM Side Impact Air Bag Control ModuleSIG RTN Signal ReturnSIL Shift Indicator LampSIR Supplemental Infl atable RestraintSIS Side Impact SensorSKIM Sentry Key Immobilizer ModuleSLA Short/Long Arm SuspensionSLS Shift Pressure Control SolenoidSLT Throttle Pressure Control SolenoidSLU Lockup Pressure Control SolenoidSMCC Stepper Motor Cruise Control SMEC Single Module Engine Controller (PCM)SMPI Sequential MultiPort InjectionSNSR SensorSO2 Sulfur DioxideSOC State Of ChargeSOD Side Object DetectionSOF Shift On the FlySOH State Of HealthSOHC Single Overhead Camsol SolenoidS/P Series/ParallelSP Splice PackSPD SpeedSPI Serial Peripheral InterfaceSPL Smoke Puff LimiterSPS Service Programming System SPS Speed SignalSPO Service Parts OperationsSPOUT Spark Output SPS Service Programming SystemSRC Selective Ride Control

SRDV Spark Retard Delay ValveSRG Solar-Refl ective GlassSRI Service Reminder IndicatorSrPP Self-reinforced PolyPropyleneSRS Supplemental Restraint SystemSRT System Readiness TestSRW Single Rear WheelSS Shift SolenoidSS Speed Signal/SensorSS1 Shift Solenoid 1SS2 Shift Solenoid 2SS3 Shift Solenoid 3SS4 Shift Solenoid 4SS5 Shift Solenoid 5SSA Shift Solenoid ASSB Shift Solenoid BSSC Shift Solenoid CSSD Shift Solenoid DSSE Shift Solenoid ESSI Solid State IgnitionSSM Suspension Steering ModuleSSS Speed Sensitive Steering SSV Shift Solenoid Valve ST Scan Tool ST Short Term (Fuel Trim)STAR Self Test Automatic Readout (tester)STAR Stolen Auto Recovery SystemSTC Snap To ConnectSTC Step Timing Controlstdby Standby STI Self Test InputSTID Station Identifi cationSTL Service Transmission Lamp STO Self Test OutputSTS Service Technicians SocietySULEV Super Ultra Low Emission VehicleSUV Sport Utility Vehicle SVO Straight Vegetable OilSVS Service Vehicle Soon SVT Special Vehicle TeamS/W Softwaresw Switch SWB Short WheelBase (see SB)SWC Steering Wheel Controls SWPS Steering Wheel Position Sensor SWS SideWall tension SensorSXR Send and Receive syn Synchronizesys System

TTA Traction AssistTA Temperature Air (Honda)




TAB Thermactor Air Bypass (AIRB)TABPV Throttle Air ByPass Valve (Ford)TAC Throttle Actuator ControlTAC Thermostatic Air Cleaner (GM)TACH TachometerTACM Throttle Actuator Control ModuleTAD Thermactor Air Divert (AIRD)TAP Transmission Adaptive PressureTAS Trap Alert SystemTAV Temperature Actuated VacuumTB Throttle BodyTBC Truck Body Controller (or Computer)TBI Throttle Body InjectionTC Transmission ControlTC TurbochargerTCC Torque Converter ClutchTCCS Torque Converter Clutch SolenoidTCCS Toyota Computer Controlled SystemTCIL Transmission Control Indicator LampTCM Transmission Control ModuleTCS Transmission Control SwitchTCS Traction Control SystemTDC Top Dead CenterTDI Toyota Direct IgnitionTED Thermo Electric DeviceTEMP TemperatureTFI Thick Film Integrated (DI)TFP Transmission Fluid PressureTFP Throttle Fluid PressureTFT Transmission Fluid TemperatureTGS Top Gear SwitchTHEMIS Thermal Management Intelligent SystemTHM Turbo HydraMaticTHS Transmission Hydraulic SwitchTIC Thermal Ignition Control (Chrysler)TID Test Identifi cationTIIS Thermal Imaging Inspection StationTIM Tire Infl ation ModuleTIM Tire Infl ation Monitor TIS Techline Information SystemTISS Transmission Input Speed SensorTIV Thermactor Idle Vacuum Valve (Ford)TKS Throttle Kicker Solenoid (Ford)TOC Transmission Oil Coolertorq Torque TOT Transmission Oil TemperatureTP Throttle PositionTPA Terminal Positive AssuranceTPI Tuned Port InjectionTPM Tire Pressure MonitorTPP Throttle Position PotentiometerTPS Throttle Position Sensor

TPT Throttle Position Transducer (Chrysler)TR Transmission Range (switch)TRS Transmission Range SwitchT-RAC Trailer Rotating Air Chambertrans Transmission/TransaxleTRDU Trailer Remote Diagnostic UnitTRS Transmission Range SensorTSA Thorax Side AirbagTSB Technical Service BulletinTSI Two-Speed IdleTSP Throttle Solenoid Positioner (Ford)TSS Transmission Speed SensorTSS Turbine Shaft Speed; Turbine Speed SensorTT Telltale Lamp TTM Tilt and Telescope Module TTS Transmission Temperature Switch (TOT)TV Throttle ValveTVAM Television Antenna Module TVR Turbine Vane RegulatorTVRS Television and Radio SuppressionTVS Thermal Vacuum SwitchTVV Thermal Vacuum ValveTWC Three-Way CatalystTWC+OC Three-Way Catalyst + Oxidation CatalystTXV Thermal Expansion Valve

UUASID Units And Scaling Identifi cationUART Universal Asynchronous Receiver-TransmitterUD UnderdriveUDDS Urban Dynamometer Driving ScheduleU/H UnderhoodU/HEC Underhood Electrical CenterUIDI Up-Integrated Direct IgnitionULEV Ultra Low Emissions VehicleULSD Ultra Low Sulfur DieselUMTS Universal Mobile Telecommunications Systemunlk Unlock

USCAR United States Council for Automotive Research

UTD Universal Theft DeterrentUTQG Uniform Tire Quality Grading

VV VoltsV2G Vehicle to GridVAC VacuumVAC Vehicle Access CodeVAC Volts Alternating CurrentVACS Vehicle Access Control SystemVAF Vane Air FlowVAF Volume Air FlowVAPS Variable Assist Power SteeringVAPS Virtual Automotive Prototyping SystemVASCO Vehicle Application-Specifi c Computer



VAT Vane Air Temperature (IAT)VAT Visual Authoring ToolVATS Vehicle AntiTheft SystemVB Valve BodyVCC Viscous Converter ClutchVCI Vehicle Communication InterfaceVCIM Vehicle Communication Interface ModeVCL Vehicle Communication LinkVCM Variable Cylinder ManagementVCM Vehicle Communication ModuleVCM Vehicle Control ModuleVCRM Variable Control Relay ModuleVCT Variable Camshaft TimingVDC Volts Direct CurrentVDCS Vehicle Dynamics Control SystemVDF Visctronic Drive FanV dif Voltage DifferenceVDIS Vehicle Diagnostic Information SystemVDM Vehicle Dynamics ModuleVDM Vehicle Dynamics MonitorVDOT Variable Displacement Orifi ce TubeVDP Vehicle Dynamics ProcessorVDR Vehicle Data Recorder VDR Vehicle Dealer Recorder VDS Valve Deactivation SystemVDV Vacuum Delay ValveVECI Vehicle Emission Control InformationVEDR Vehicle Event Data Recorderveh Vehicle vel Velocityver Version vert Vertical VES Variable Effort Steering VF Vacuum FlorescentVGT Variable Geometry TurbochargerVIC Virtual Image Cluster moduleVICS Vehicle Information Communication SystemVICS Variable Induction Control SolenoidVIN Vehicle Identifi cation NumberVIP Vehicle Intrusion ProtectionVIR Valve In ReceiverVIU Vehicle Interface Unit VLCM Variable Load Control ModuleVLR Voltage Loop Reservevlv Valve VMM Vehicle Measurement ModuleVMRS Vehicle Maintenance Reporting SystemVMV Vacuum Modulator ValveVMV Vapor Management ValveVNT Variable Nozzle TurbineVNT Variable Nozzle TurbochargerVOTM Vacuum Operated Throttle Modulator

VPWR Vehicle PowerVR Vacuum Regulator; Voltage RegulatorVREF Voltage ReferenceVRLA Valve Regulated Lead AcidVRS Variable Reluctance SensorVRV Vacuum Reducer ValveVRIS Variable Resonance Induction SystemVS Variable SpeedVS Vehicle SensorVSC Vehicle Stability ControlVSES Vehicle Stability Enhancement System vspd Vehicle speed VSS Vehicle Speed SensorVSV Vacuum Solenoid Valve VTA Vehicle Theft AlarmVTD Vehicle Theft Deterrent

VTECVariable (valve) Timing (and lift) Electronic Control

VTSS Vehicle Theft Security SystemVVT-i Variable Valve Timing with IntelligenceVVTL-i Variable Valve Timing and Lift with Intelligence

Ww/ WithWAC Wide Open Throttle A/C Cutoffwarn Warning W/B WheelbaseWCF Wireless Communication FrameworkWDS Workbay Diagnostic SystemWDS Worldwide Diagnostic SystemWGC Wastegate ControlWHL WheelWIF Water In Fuel (sensor)w/o Without WOT Wide Open ThrottleW/P Water PumpWSM WorkShop ManualWSS Wheel Speed SensorWU-OC Warmup Catalyst with Oxidation CatalystWU-TWC Warmup Catalyst with Three Way CatalystWVO Waste Vegetable OilWVVWS Wireless Vehicle to Vehicle Warning System

XX-valve Expansion ValvexVDS Extended Vehicle Diagnostic System

Yyd Yard

ZZEV Zero Emission Vehicle


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