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Abbreviations, Acronyms and Initialisms


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NUMBER
2V - Two (Venturi) Valve (two barrel carburetor)
2WS - Two Wheel Steer
3GR - Third Gear
4GR - Fourth Gear
4EAT - 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 Antilock
4WAS - Four Wheel Air Suspension
4WD - Four Wheel Drive
4WS - Four Wheel Steer
5R55W - Five speed, Rear wheel drive, (up to) 550 lb/ft torque rated, Wide ratio
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A
A - Amperes
A-6 - Axial 6 cylinder A/C compressor
AALA - American Automobile Labelling Act
AAT - Ambient Air Temperature
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
accel - Acceleration
ACCS - Air Conditioning Cycling Switch
accum - Accumulator
accy - Accessory
ACD - Air Conditioning Demand
ACE - Active Cornering Enhancement
ACL - Air cleaner
ACM - Airbag Control Module
ACM - Audio Control Module
ACR4 - Air Conditioning Refrigerant, Recovery, Recycling, Recharging
ACON - Air Conditioning On
ACP - Air Conditioning Pressure
act - Actual
ACT - Air Charge Temperature
actv - Activate
ACV - (thermactor) Air Control Valve
A/D - Analog to Digital
AD - Accomodated Device
adapt - Adaptive
adapts - Adapters
ADAS - Advanced Driver Assistance System
ADBV - Anti Drainback Valve
ADC - Automatic Distance Control
ADG - Accomodated Device Gateway
adj - Adjust
ADL - Automatic Door Lock
ADS - Auxilliary Discriminating Sensor
ADU - Analog-Digital Unit
AECM - Airbag Electronic Control Module
A/F - Air Fuel Ratio (see also AFR)
AFC - Air Flow Control
AFC - Air Fuel Control
AFCD - Advanced Frontal Crash Dummy
AFCM - Alternate Fuel Control Module
AFECM - Alternate Fuel Engine Control Module
AFO - Alternate Fuel Operation
AFR - Air Fuel Ratio (see also A/F)
aft - After
AGSP - Auxilliary Gauge Switch Pack
AGVS - Automated Guided Vehicle System
AHLD - Automatic Headlamp Levelling Device
AHR - Active Head Restraint
ahrs - Amp Hours
AHS - Active Handling System
AIM - Automotive Interior Material
AIR - Air Injection Reaction (Secondary air injection)
AIRB - Secondary Air Injection Bypass
AIRD - Secondary Air Injection Diverter
AIRM - Secondary AIR Pump Monitor
AIS - Automatic Idle Speed
ALC - Automatic Lamp Control
ALC - Automatic Level Control
ALCL - Assembly Line Communications Link (replaced with DLC)
ALDL - Assembly Line Data Link (replaced with DLC)
ALM - Adaptive Learn Matrix
ALR - Automatic Locking Retractor
Alt - Alternative
ALT - Alternator (replaced with GEN)
AM - Amplitude Modulation
AMB - Ambient
AMM - Air Mass Meter
amp - Amplifier
amps - Amperes or Amperage
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
APC - Automatic Performance Control
APCM - Accessory (or Auxilliary) Power Control Module
APECS - Advanced Proportional Engine Control System
API - American Petroleum Institute
APO - Accessory Power Outlets
APP - Accelerator Pedal Position
APT - Adjustable part Throttle
ARC - Active Roll Control
ARC - Automatic Ride Control
ARS - Adaptive Receptive System
ARS - Automatic Restraint System
ARTHUR - Automatic Radio system for Traffic situations on Highways and Urban Roads
ASA - Air Signal Attenuator
ASA - Automatic Slack Adjuster
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
ASM - Accelerator and Servo control Module
ASM - Air Solenoid Module
ASM - Alarm Siren Module
asm - Assembly
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
ATF - Active Transfer Case
ATF - Automatic Transfer Case
ATF - Automatic Transmission Fluid
ATM - Actuator Test Mode
AT-PZEV - Advanced Technology Partial Zero Emission Vehicle
ATSLC - Automatic Transmission Shift Lock Control
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
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B
B+ - Battery positive (voltage)
BARO - Barometric (pressure)
BAS - Brake Apply Sensor
batt - Battery
BBV - Brake Booster Vacuum
BCA - Bias Control Assembly
BCM - Body Control Module
BECU - Body Electronic Control Unit
BFC - Body Function Controller
BHP - Brake Horsepower
BLM - Block Learn Multiplier (replaced with LT FUEL TRIM)
B-LVL - Bilevel
BLW - Brake Lining Wear
BMAP - Barometric and Manifold Absolute Pressure
bn - Bank
BOB - Break-Out Box
BOO - Brake On/Off
BP - Back Pressure
BPA - Bypass Air
BPCM - Battery Pack Control Module
BPMV - Brake Pressure Modulator Valve
BPP - Brake Pedal Position
BPW - Base Pulse Width
BSFC - Brake Specific Fuel Consumption
BSW - Black Sidewalls
BTCM - Brake Torque Control Module
BTDC - Before Top Dead Center
BTM - Battery Thermal Module
BTSI - Brake Transmission Shift Interlock
Btu - British thermal units
BV - Battery Voltage
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C
C3I - Computer Controlled Coil Ignition
CAA - Canadian Automobile Association
CAA - Clean Air Act
CAB - Controller, Antilock Brake
CAC - Charge Air Cooler
CAFC - Company Average Fuel Consumption (Canada)
CAFE - Corporate Average Fuel Economy (USA)
cal - Calibration
calc - Calculated
CALID - Calibration Identification
Calif - California
CAMM - Computer Aided Manufacturing Measurement
CAMS - Computerized Automotive Maintenance System
CAN - Controlled Area Network
CANP - Canister Purge (solenoid)
CARB - California Air Resources Board
CARS - Canadian Automotive Repair and Service Council
CASE - Cranking Angle Sensing Error
CAS GND - PCM Case Ground
cass - Cassette
CATS - Computer Aided Test Suite
CC - Climate Control
CC - Coast Clutch
CC - Cruise Control
CCC - Computer Command Control
CCD - Chrysler Collision Detection
CCCD - Catalytic Converter Cool-Down
CCD - Computer Controlled Dwell
CCDIC - Climate Control Driver Information Center
CCFL - Cold-Cathode Flourescent Lamp
CCM - Central Control Module
CCM - Chassis Control Module
CCM - Comprehensive Component Monitor
CCM - Convenience Charge Module
CCO - Converter Clutch Override
CCOT - Cycling Clutch Orifice Tube
CCP - Climate Control Panel
CCP - Controlled Canister Purge
CCRM - Constant Control Relay Module
CCS - Climate Controlled Seat
CCS - Coast Clutch Solenoid
CCSM - Climate Controlled Seat Module
CCW - Counter ClockWise
CD - Compact Disc
CDA - Cylinder De-Activation
CDR - Chrysler Diagnostic Readout
CDR - Crash Data Retrieval
CDRV - Crankcase Depression Regulator Valve
CDX - Compact Disc Changer
CE - Commutator End
CEL - Check Engine Lamp (replaced with MIL)
CEAB - Cold Engine Air Bleed
CEMF - Counter Electromotive Force
CEMS - Catalyst Efficiency Management System
CEMS - Carbureted Engine Management System
CEX - Cabin Exchanger
CFI - Central Fuel Injection (replaced with TBI)
CFI - Continuous Fuel Injection
CFI - Cross Fire Injection
cfm - cubic feet per minute
CG - Center of Gravity
CHMSL - Center High Mounted Stop Lamp
CID - Component Identification
CID - Cubic Inch Displacement
CID - Cylinder Identification
CJC - Collision Judgement Coefficient
CKP - Crankshaft Position
CKT - Circuit
CL - Closed Loop
CLC - Converter Lockup Clutch (replaced with TCC)
CLCC - Closed Loop Carburetor Control
CLS - Coolant Level Switch
CLTBI - Closed Loop Throttle Body Injection
CLYC - Closed Loop Yaw Control
CLNT - Coolant
CMC - Compressor Motor Controller
cmd - Command
cmdd - Commanded
CMFI - Central Multi-port Fuel Injection
CMP - Camshaft Position
CMVSS - Canadian Motor Vehicle Safety Standards
CNG - Compressed Natural Gas
CO - Carbon Monoxide
CO2 - Carbon Dioxide
COBDIMR - Customer On Board Diagnostics Inspection/Maintenance Readiness
COMBATT - Commercially Based Tactical Truck
combo - Combination
COMDC - Commanded Duty Cycle
comm - Communication
cond - Condition
const - Constant
COP - Coil On Plug
COP - Computer Operating Properly
CP - Canister Purge
CPA - Connector Position Assurance
CPC - Camshaft Position Control
CPI - Central Port Fuel Injection
CPL - Control Parts List
CPM - Cellular Phone Module
CPP - Clutch Pedal Position
CPS - Cam Profile Switching
CPS - Center Panel Switches
CPS - Central Power Supply
CPS - Childseat Postioning Sensor
CPU - Central Processing Unit
CRR - Cool Running Rotor
CRT - Cathode Ray Tube
CRTC - Cathode Ray Tube Controller
CRTS - Continuously Regenerating Trap System
CS - Charging System
CSC - Commercial Stripped Chassis
CSE GND - PCM Case Ground
CSFI - Central Sequential Fuel Injection
CSI - Compression Sense Ignition
CSM - Central Security Module
cSt - Centistokes
CSTO - Compression Sense Time-Out
CTD - Content Theft Deterent
CTM - Central Timer Module
CTOX - Continuous Trap Oxidizer
CTP - Closed Throttle Position (switch)
CTS - Coolant Temperature Sensor
CV - Constant Velocity
CVN - Calibration Verification Number
CVRSS - Continuously Variable Road Sensing Suspenion
CVRTD - Continuously Variable Real Time Damping
CVS - Canister Vent Solenoid
CVT - Continuously Variable Transmission, Transaxle
CWS - Continental Wheel System
CZS - Crash Zone Sensor
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D
DAB - Delayed Accessory Bus
DAB - Driver AirBag (module)
DART - Diagnostic And Reprogramming Tool
dB - Decibels
dBA - decibels on A-weighted scale
DBB - Dual Bed Bead
DBM - Dual Bed Monolith
DC - Direct Current
DC - Duty Cycle
DCCSM - Dual Climate Controlled Seat Module
DCM - Door Control Module
DDM - Driver's Door Module
DDS - Deflection Detection System
DDS - Driver's Door Switch
DE - Drive End
dec - Decrement
DEC - Digital Electronic Controller
DERM - Diagnostic Energy Reserve Module
des - Desired
DFCO - Deceleration Fuel CutOff
DFI - Direct Fuel Injection
DGI - Direct Gasoline Injection
DI - Distributor Ignition
DIC - Driver Information Center
diff - Differential
DIM - Dashboard Integration Module
dis - Disable
DIS - Direct (aka Distributorless) Ignition System (replaced with EI)
disc - Disconnect
DISI - Direct Injection, Spark Ignition
DIST - Distributor
DIY - Do It Yourself
DLC - Data Link Connector
DLC - Diamond Logic Computer
DMCM - Driver Motor Control Module
DMM - Digital MultiMeter
DMSD - Drive Motor Speed and Direction
DOHC - Double Overhead Cam
DNR - Dolby Noise Reduction
DOL - Data Output Line
DPFE - Differential Pressure Feedback EGR
DPI - Dual Plug Inhibit
DRB - Diagnostic Readout Box
DRF - Deactivating Roller Follower
DRL - Daytime Running Lamps
DRR - Digital Radio Receiver
DRW - Dual Rear Wheel
DSCC - Distance Sensing Cruise Control
DSDA - Dual Stage Driver Airbag
DSI - Dual Stage Inflator
DSM - Driver's Seat module
DSO - Digital Storage Oscilloscope
DSP - Digital Signal Process
DSPA - Dual Stage Passenger Airbag
DSS - Downshift Solenoid
DSST - Dunlop Self Supporting Tire
DTC - Diagnostic Trouble Code
DTM - Diagnostic Test Mode
DTR - Digital Transmission Range
DTT - Diesel Transmission Technologies
DVOM - Digital Volt-Ohmmeter
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E
E4OD - Electronic 4-Speed Overdrive
E85 - Ethanol 85 percent
EA - Electronic Accelerator
EAC - Electronic Air Control (replaced with AIR)
EAIR - Electronic (secondary) Air Injection Reaction
EAS - Electrically Assisted Steering
EAS - Electronic Air Switching
EATC - Electronic Automatic Temperature Control
EBC - Electronic Brake Control
EBCM - Electronic Brake Control Module
EBD - Electronic Brake force Distribution
EBM - Electronic Brake Module
EBP - Exhaust Back Pressure
EBTCM - Electronic Brake and Traction Control Module
EC - Electrical Center
EC - Electronic Control
E&C - Entertainment and Comfort
ECA - Electronic Control Assembly (replaced with PCM)
ECC - Electronic Climate Control
ECD - Electronically Controlled Deceleration
ECI - Extended Compressor at Idle
ECL - Engine Coolant Level
ECM - Electronic Control Module
ECM - Engine Control Module
ECS - Electronic Crash Sensor
ECS - Emission Control System
ECT - Engine Coolant Temperature (Switch, Sensor)
ECU - Electronic Control Unit
EDF - Electric Drive Fan (relay)
EDIS - Electronic Direct Ignition System (replaced with EI)
EDR - Event Data Recorder
EDSR - Electronic Dealer Service (Investigation) Report
EEC - Electronic Engine Control
EEDS - Electric-Electronic Distribution System
EEPROM - Electronically Erasable Programmable Read Only Memeory
EEVIR - Evaporator Equalized Values In Receiver
EFE - Early Fuel Evaporation
EFI - 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 Cluster
EGO - Exhaust Gas Oxygen (replaced with O2S)
EGOG - EGO Ground
EGR - Exhaust Gas Recirculation
EGRBARO - Enable Baro Read instead of EGR pressure
EGRC - Exhaust Gas Recirculation Control
EGRCMDS - EGR Motor Commanded In Steps
EGRMC1 - EGR Motor Control Output Command
EGRMC2 - EGR Motor Control Output Command
EGRMC3 - EGR Motor Control Output Command
EGBMC4 - EGR Motor Control Output Command
EGRT - Exhaust Gas Recirculation Temperature (switch)
EGR TVV - Exhaust Gas Recirculation Thermal Vacuum Valve
EGRV - Exhaust Gas Recirculation Vent
EGRVR - EGR Valve Vacuum Control
EGTS - Exhaust Gas Temperature Switch (replaced with EGRT)
EHB - Electro-Hydraulic Brake
EHCU - Electronic Hydraulic Control Unit
EHOC - Electrically Heated Oxidation Catalyst
EHPA - Electro-Hydraulic Power Assist
EHPAS - Electric Hydraulic Power Assisted Steering
EHPS - Electro-Hydraulic Power Steering
EHTWC - Electrically Heated Three Way Catalyst
EI - Electronic Ignition (includes Distributorless Ignition System, formerly DIS)
ELC - Electronic Level Control
EM - Energy Management
EM - Engine Modification
EMAS - Engine Management and Analysis System
EMAT - Electro-Mechanical Automatic Transmission
EMB - Electromagnetic Brakes
EMB - Electro-Mechanical Brake
EMCC - Electronically Modulated Converter Clutch
EMF - ElectroMotive Force (voltage)
EMI - Electromagnetic Interference
EMR - Electronic Module Retard
EMR - Emission Maintenance Reminder
EOBD - Enhanced On-Board Diagnostics
EOP - Engine Oil Pressure
EOT - Engine Oil Temperature
EOTF - Engine Oil Temperature Fault Detection
EOT V - Engine Oil Temperature Volts
EP - Exhaust Pressure
EPA - Environmental Protection Agency
EPACT - Energy Policy Act
EPC - Electronic Pressure Control
EPHS - Electrically Powered Hydraulic Steering
EPR - Exhaust Pressure Regulator
EPROM - Erasable Programmable Read Only Memory
EPS - Electric Power Steering
EPS - Electric Power Steering
EPS - Engine Position Sensor
EPT - EGR Pressure Transducer (replaced with PFE)
ERH - Extended Ride Height
ESB - Energy Storage Box
ESB - Expansion Spring Brake
ESC - Electrical Systems Controller
ESC - Electronic Spark Control
ESC - Electronic Suspension Control
ESC - Extended Service Contract
ESCM - Energy Storage Control Module
ESD - Electrostatic Discharge
ESM - Electronic Steering Module
ESN - Electronic Serial Number
ESO - Engine ShutOff
ESOF - Electronic Shift On (the) Fly
ESP - Electronic Stability Program
EST - Electronic Spark Timing
ETBE - Ethyl Tertiary Butyl Ether
ETC - Electronic Temperature Control
ETC - Electronic Throttle Control
ETC - Electronic Timing Control
ETCC - Electronic Touch Climate Control
ETR - Electronically Tuned Receiver
ETS - Enhanced Traction System
EUDC - Extra-Urban Driving Cycle
EUDC-LP - Extra-Urban Driving Cycle for Low Power vehicles
EV - Electric Vehicle
EVA - Electronic Vibration Analyzer
EVAP - Evaporative Emission
EVAPCPF - Evaporative Emissions Canister Purge Fault YES/NO
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 VOLTS
EVIC - Electronic Vehicle Information Center
EVMV - Electric Vapour Management Valve
EVO - Electronic Variable Orifice
EVP - EGR Valve Position (sensor)
EVR - EGR Vacuum Regulator
EVTOP - Enhanced Tactical Vehicle Occupant Protection
EVTM - Electrical & Vacuum Troubleshooting Manual
EWMA - Exponentially Weighted Moving Average
EXH - Exhaust
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F
F4WD - Full Time Four Wheel Drive
FABS - Flexible Auto Body System
FAF - Fan Air Flow
FANDC - Variable Speed Fan Duty Cycle %
FANVARF - Variable Speed Fan Output Fault
FBC - Feedback Carburetor
FC - Fan Control
FC - Friction Curve
FCM - Front Control module
FCP - Fuel Cell Partnership
FCU - Front Control Unit
FCV - Fuel Cell Vehicle
FDBK - Feedback
FDC - Fuel Data Center
FEAD - Front End Accessory Drive (belt)
FED - Federal (except California)
FEDS - Fuel Enable Data Stream
FEDS - Flexible Engine Diagnostic System
FEIC - Fuel Economy Integrated Counter
FET - Field Effect Transistor
FEX - Front Exchanger
FF - Flexible Fuel
FFCRS - Front-Facing Child Restraint System
FFFP - Fuel-Flexible Fuel Processor
FFH - Fuel Fired Heater
FFS - Fine-blanking and Finishing System
FFS - Flexible Fuel Sensor
FFV - Flexible Fuel Vehicle
FFWS - Fuel Filter Water Separator
FI - Fuel Injection
FICM - Fuel Injector Control Module
FIDO - Flame Ionization Detector Optimization
FIM - Fuel Indicator Module
FIPL - Fuel Injection Pump Lever
FIPT - Fuel Inlet Pressure Test
Fl - Front Left
FLI - Fuel Level Indicator Input percent
FLI V - Fuel Level Indicator Input VOLTS
FLO - Fast Light-Off
flr - Floor
FLVV - Fill Limit Vent Valve
FM - Frequency Modulation
FMEM - Failure Mode Effects Management
FMVSS - Federal Motor Vehicle Safety Standards
FP - Fuel Pump
FPCM - Fuel injection Pump Control Module
FPDM - Fuel Pump Driver Module
FPF - Fuel Pump Output Fault
FPI - Fins Per Inch
FPM - Fuel Pump Monitor
FPR - Fuel Pump Regulator
FPRC - Fuel Pressure Regulator Circuit
FPS - Fast Pass Standard
FPSM Fuel Pump Secondary Monitor
FPV - Ford Performance Vehicles
FR - Front Right
FRACAS - Failure Reporting And Corrective Action System
FRC - Forced
freq - Frequency
frnt - Front
FRP - Fuel Rail Pressure
FRS - Face Recognition System
FRV - First Response Vehicle
FSA - Field Service Action
FSDI - Four-Stroke, Direct Injection
FSI - Fuel Straight Injection
FSS - Forward Sensing System
FSVF - Fuel Solenoid Valve Fault
FSVM -Fuel Solenoid Valve Secondary Monitor
FT - Fuel Trim
FTP - Federal Test Procedure
FTP - Fuel Tank Pressure
FTPT - Fuel Tank Pressure Transducer
FUDC - Federal Urban Driving Cycle
FUELPW1 - Injector Pulse Width Bank 1
FUELPW2 - Injector Pulse Width Bank 2
FW - Flat Wire
fwd - Forward
FWD - Front Wheel Drive
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G
GA - Gage
GA - Gravitational Acceleration
GAWR - Gross Axle Weight Rating
GCR - Global Concern Report
GCW - Gross Combined Weight
g/cyl - Grams per Cylinder
GCWR - Gross Combined Weight Rating
GDI - Gasoline Direct Injection
GEN - Generator
GENF - Generator Output Fault
GENFDC - Generator Field Control Output
GEM - Gasoline Engine Management
GEM - Generic Electronic Module
GFS - Generator Field Signal
GGT - Gas Guzzler Tax
GHG - GreenHouse Gas
GISMO - Geographic Information System, Mobile
GND - Ground
GOVN - Governor Module
GPCM - Glow Plug Control Module
GPS - Global Positioning System
GS - Garage Shift
g/sec - Grams per Second
GTL - Gas To Liquid
GVW - Gross Vehicle Weight
GVWR - Gross Vehicle Weight Rating
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H
H - Hydrogen
H2DI - Hydrogen Direct Injection
H2O - Water
HAST - High Accelerated Stress Test
HBA - Hydraulic Brake Assist
HBU - Hub Bearing Unit
HC - Hydrocarbons
HCCI - Homogeneous-Charge, Compression Ignition
HCM - Heating Control Module
HCM - Hybrid Control Module
HCU - Hydraulic Control Unit
HCV - Heavy Commercial Vehicle
H/CMPR - High Compression
HD - Heavy Duty
HDC - Heavy Duty Cooling
HDGV - Heavy Duty Gasoline-fueled Vehicle
HDR - High Data Rate
HD-UDDS - Heavy Duty Urban Dynamometer Driving Schedule
HEC - Hybrid Electronic Cluster
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
HEV - Hybrid Electric Vehicle
HFC - High Fan Control
HFC - Hydraulic Fading Compensation
HFCF - High Speed Fan Control Fault
HFM - Hot Film Meter
HFP - High Fuel Pump
Hg - Mercury
Hi Alt - Hi Altitude
HID - High Intensity Discharge
HIS - Horizontal Impact Sensor
hist - History
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
HPP - High Pressure Pump
HPS - Head Protection System
HPS - High Performance System
HPV - High Pressure Vapour
HPVS - Heat Pump Ventilation System
HRC - Headlamp Range Control
HSA - Head Side Airbag
HSC - High Swirl Combustion
HSCDS - High-Sensitivity Collision Detection System
HSDI - High-Speed Direct Injection
HSE - High-Speed Enrichment
HSEA - High Solar Energy Absorbing (glass)
HTCM - Heating-ventilation-air-conditioning Thermal Control Module
HTR11 - Bank 1 Upstream 02S Heater Control
HTR11F - Bank 1 Upstream 02S 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 02S Heater Control
HTR22F - Bank 1 Downstream O2S Heater Circuit Fault
HTRX1 - 02S Upstream Heater Control
HTRX2 - O2S Downstream Heater Control
HUD - Heads Up Display
HUD - Heads Up Display
HVAC - Heater-Vent-Air Conditioning
HVACM - Heater-Vent-Air Conditioning Module
HVI - High Viscosity Index
HVIL - High Voltage Interlock Loop
HVM - Heater Vent Mondule
HW - Heated Windshield
HWFET - Highway Fuel Economy Test (driving schedule)
HYPAS - Hydraulic Power Assisted Steering
Hz - Hertz
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I
IA - Intake Air
IABM - Integrated AirBag Module
IAC - Idle Air Control
IAFM - Integrated Air Fuel Module
IAFS - Integrated Air Fuel System
IAT - Intake Air Temperature
iATN - International Automotive Technicians Network
IBOB - Intelligent BreakOut Box
IC - Ignition Control
IC - Integrated Circuit
ICA - Injector Cam Actuation
ICC - Intelligent Cruise Control
ICCS - Integrated Chassis Control System
ICDX - Integrated Compact Disc Changer
ICE - Internal Combustion Engine
ICM - Ignition Control Module
ICP - Injection Control Pressure
ICS - Integrated Chassis System
ICWS - Intersection Collision Warning System
ID - Identification
ID - Inside Diameter
IDI - Integrated Direct Ignition
IDIS - International Dismantling Information System
IDM - Ignition Diagnostic Module
IDM - Injector Driver Module
IDS - Integrated Diagnostic Software
IEDIS - Integrated Electronic Distributorless Ignition System
IFES - Integrated Front End System
IFI - Indirect Diesel Injection
IFS - Inertia Fuel Shutoff
IFSM - Integrated Fuel System Module
IGN - Ignition
ILC - Idle Load Compensator
ILEV - Inherently Low Emission Vehicle
illum - Illumination
I/M - Inspection Maintenance
IMA - Integrated Motor Assist
IMDX - Integrated Mini Disc Changer
IMLUT - Inspection/Maintenance Look-Up Table
immo - Immobilizer
IMPR - In-use Monitor Performance Ratio
IMRC - Intake Manifold Runner Control
IMRC F - Intake Manifold Runner Control Fault YES/NO
IMRCM - Intake Manifold Runner Control Monitor Input Bank 1 VOLTS
IMRCM2 - Intake Manifold Runner Control Monitor Input Bank 2 VOLTS
IMS - Inductive Magnetic Saturation
IMS - Instant Mobility System
IMSC - Intake Manifold Swirl Control
IMSC F - Intake Manifold Swirl Control Fault
IMT - Intake Manifold Tuning
IMTD - Intake Manifold Temperature Differential
IMTV - Intake Manifold Tuning Valve Control %
IMTVF - Intake Manifold Tuning Valve Fault
in - Inch(es)
inadv - Inadvertant
inc - Increment
INCA - In-Car Aquisition
incand - Incandescent
infl - Inflatable
init - Initial
INJ - Injection
INJ - Injector
INJ1F-8F - Fuel Injector Primary Fault Cylinders 1 thru 8
INJ9F-lOF - Fuel Injector Primary Fault Cylinders 9 and 10
INP - Input
inst - Instant
int - Interior
INT - Integrator (replaced with ST FUEL TRIM)
I/O - In/Out
IOC - Instant Oil Change
I/P - Instrument Panel
IPC - Instrument Panel Cluster
IPEC - Instrument Panel Electrical Center
IPM - Instrument Panel Module
IPM - Integrated Power Module
IPR - Injector Pressure Regulator
IRDS - Independant Rear Drive Suspension
IRQ - Interrupt Request
IRS - Independant Rear Suspension
ISA - Integrated Starter-Alternator
ISAD - Integrated Starter Alternator Damper
ISB - Interact System B
ISC - Idle Speed Control
ISG - Integrated Starter-Generator
ISI - Ion Sensing Ignition
ISO - Interior Systems Optimization
ISO - International Standards Organization
iso - Isolation
ISS - Input Shaft Speed
ITARDA - Institute for Traffic Acccident Research and Data Analysis
ITTB - Idle Time To Boil
ITTR - Inflatable Tubular Torso Restraint
ITS - Idle Tracking Switch
IVC - Integral Vapour Canister
IVCS - Integrated Vehicle Control System
IVI - Intelligent Vehicle Initiative
IVIS - In Vehicle Information System
IVS - Idle Validation Switch
IVSC - Integrated Vehicle Speed Control
IWC - Inertia Weight Class
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J
JARI - Japan Automotive Research Institute
JTEC - Jeep, Truck Engine Control
JTEC - Joint Transmission-Engine Controller
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K
KAM - Keep Alive Memory
KAPWR - Keep Alive power
KDD - Keyboard Display Driver
kg - Kilogram
kg/h - Kilograms per Hour
kHz - Kilohertz
km - Kilometer
km/h - Kilometers per Hour
km/l - Kilometers per Litre
KOEO - Key On Engine Off
KOER - Key On Engine Running
kPa - Kilopascal
KS - Knock Sensor
KS1 V - Knock Sensor Input Bank 1 VOLTS
KS2 V - Knock Sensor Input Bank 2 VOLTS
kV - Kilovolts
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L
L - Liter(s)
L4 - Four Cylinder Inline Engine
LATCH - Lower Anchors and Tethers for CHildren
LB - Long Box, Long Bed
LCD - Liquid Crystal Display
LCM - Lighting Control Module
LDCL - Left Door Control Locking
LDCM - Left Door Control Module
LDDT - Light Duty Diesel Truck
LDGT - Light Duty Gasoline (fueled) Truck
LDM - Lamp Driver Module
LDP - Leak Detection Pump
LDR - Low Data Rate
lduty - Light Duty
LEADER - Low Emissions Advanced Engine Range
LED - Light Emitting Diode
LEP - Light Emitting Polymer
LEV - Low Emissions Vehicle
LF - Left Front
LFC - Lamp Fault Code
LFC - Low Fan Control
LFCF - Low Speed Fan Control Fault
LFWS - Left Front Wheel Speed
LFCS - Low Flow Cooling System
LFP - Low Fuel pump
LGM - Lift Gate Module
LH - Left Hand
LIE - Laterally Inclined Engine
L/M - Litres Per Minute
lm - Lumens
LMD - Left Mid Door
LNG - Liquid Natural Gas
LO - Low
LOMA - Lifter Oil Manifold Assembly
LONGFT1 - Long Term Fuel Trim Bank 1 %
LONGFT2 - Long Term Fuel Trim Bank 2 %
LOS - Limited Operation Strategy
LPA - Low Pressure Accumulator
LPG - Liquified Petroleum Gas
LPM - Litres Per Minute
LPO - Limited Production Option
LPS - Low Pressure Sensor
LR - Left Rear
LR - Loaded Radius
LRA - Latching Rocker Arm
LRD - Left Rear Door
lrn - Learn
LSD - Limited Slip Differential
LSEGR - Linear Solenoid Exhaust Gas Recirculation
LSP and BV - Load Sensing Proportioning and Bypass Valve
LSUV - Luxury Sport Utility Vehicle
LT - Left
LT - Long Term (Fuel Trim)
LTA - Low Temperature Aftercooling
LTD - Long-Travel Dampened (clutch)
LTPI - Low Tire Pressure Indicator
LTPWS - Low Tire Pressure Warning System
LUS Lock-Up Solenoid (see TCC)
LV8 - Load Variable 8 Cylinder
LVDT - Linear Variable Differential Transducer
LVL - Level
LWB - Long WheelBase (see LB)
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M
MAF - Mass Air Flow
malf - Malfunction
MALL - Multifunction Alarm Lighting and Locking
MAN - Manufacturer
MAP - Manifold Absolute Pressure
MAT - Manifold Air Temperature
MC - Measuring Core
MC - Mixture Control
MCM - Message Center Module
MCU - Microprocessor Control Unit
MD - Mini Disc
MD - Modulated Displacement
MDP - Manifold Differential Pressure
MDS(2) - Mopar Diagnostic System
MDX - Mini Disc Changer
MECS - Mazda Electronic Control System
med - Medium
MEM - Memory
MEMCAL - Memory Calibration
MFC - Medium Speed Fan Control ON/OFF
MFCF - Medium Speed Fan Control Fault YES/NO
MFI - Multiport Fuel Injection
MGMT - Management
MIC - Mechanical Instrument Cluster
MID - Midrange
MID - Monitor Identification
MIL - Malfunction Indicator Lamp
MIN - Minimum
MIN - Minute
MIN - Mobile Identification Number
MIP - Mixer Inlet Pressure
ML - Manual Longitudinal
MLP(s) - Manual Lever Position (sensor)
mm - Millimetre
mm3 - Cubic Millimetre(s)
MMC - Manifold Mounted Converter
mmhg - Millimeters of mercury
MMM - Memory Mirror Module
MMT - Methylcyclopentadienyl Manganese Tricarbonyl
mod - Module
mon - Monitor
MPa - Megapascal
MPFI - Multiport Fuel Injection
ms - Millisecond
MSFF - Miles Since First Fail
MSLF - Miles Since Last Fail
MSM - Memory Seat Module
MSO - Mixed Signal Oscilloscope
MSRP - Manufacturers Suggested Retail Price
MST - Manifold Surface Temperature
MSVA - Magnetic Steering Variable Assist
M/T - Manual Transmission/Transaxle MTBE - Methyl Tertiary Butyl Ether
MTBF - Mean Time Between Failures
MTV - Manifold Tuning Valve
MV - Megavolt
mV - Millivolt
MVLPS - Manual Valve Lever Position Sensor
MVSA - Motor Vehicle Safety Act
MVSS - Motor Vehicle Safety Standards
MY - Model Year
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N
NAAO - North American Automotive Operations
NAES - North American Export Sales
NAICC - Navigation-Aided Intelligent Cruise Control
NC - Normally Closed
NCAP - New Car Assessment Program
NDH - Navigation Display Head
NEG - Negative
NEU - Neutral
NFF - No Fault Found
NG - Natural Gas
NGS - New Generation STAR (Self Test Automatic Readout)
NGSC - Next Generation Speed Control
NGV - Natural Gas Vehicle
NGV - New Generation Vehicle
NGVM - Natural Gas Vehicle Module
NHTSA - National Highway Traffic Safety Administration
NI - Neutral Idle
NiMH - Nickel Metal Hydride
NLGI - National Lubricating Grease Institute
N-m - Newton Meters
NO - Normally Open
NOx - Nitrogen Oxides
NoVRAM - Non Volatile Random Access Memory
NPF - No Problem Found
NPTC - National Pipe Thread Coarse
NPTF - National Pipe Thread Fine
NSBU - Neutral Safety Back Up
NV - Night Vision
NVH - Noise, Vibration and Harshness
NVLD - Natural Vacuum Leak Detection
NVRAM - Non Volatile Random Access Memory
NYCC - New York City Cycle
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O
O2 - Oxygen
O2S - Oxygen Sensor
OASIS - Online Automotive Service Information System
OASIS - Organization for the Advancement of Structured Information Standards.
OBD - On Board Diagnostics
OBD II - On Board Diagnostics, Generation 2
OC - Oxidation Catalyst Only
OCC - Output Circuit Check
OCR - Oil Control Ring
OCS - Opportunity Charge Station
OD - Outside Diameter
OD - Overdrive
ODM - Output Drive Module
ODO - Odometer
OE - Original Equipment
OEM - Original Equipment Manufacturer
OHC - Overhead Camshaft
OL - Open Loop
OLED - Organic Light Emitting Diode
OPR - Over Pressure Relief
ORC - Oxidation Reduction Converter
ORC - Occupant Restraint Controller
ORVR - On-board Refueling Vapour Recovery
OSC - Output State Check
OSC - Output State Control
OSGI - Open-Service Gateway Interface
OSS - Output Shaft Speed
OTC - Overhead Trip Computer
OTIS - Overhead Travel Information System
OTM - Output Test Monitor
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P
PAB - Passenger Air Bag
PADS - Passenger Airbag Disarm Switch
PAG - Polyalkylene Glycol
PAG - (Ford) Premier Automotive Group
PAIR - Pulsed Secondary Air Injection
PASE - PAssive Start and Entry system
PASM - Porche Active Steering Management
PASS - Passenger
PASS - Personalized Automotive Security System
PATS - Passive Anti-Theft System
PB - Power Brakes
PC - Pressure Control
PCB - Printed Circuit Board
PCI - Programmable Communications Interface
PCI - Programmable Controller Interface
PCM - Power Control Module
PCM - Powertrain Control Module
PCS - Pre-Crash Sensor
PCS - Pressure Control Solenoid
PCV - Positive Crankcase Ventilation
PDC - Park Distance Control
PDC - Parts Distribution Center
PDC - Power Distribution Center
PDS - Passenger Door Switch
PDS - Portable Diagnostic Software
PDV - Parcel Delivery Van
PEB - Power Electronics Bay
PEM - Proton Electric Membrane
PEMFC - Proton Exchange Membrane Fuel Cell
PEP - Peripheral Expansion Port
PFE - Pressure Feedback EGR
PFI - Port Fuel Injection
PFM - PDS File Manager
PFS - Purge Flow Sensor
PHEV - Plug-in Hybrid Electric Vehicle
PHT - Parallel Hybrid Truck
PID - Parameter Identification
PIM - Power Inverter Module
PIP - Profile Ignition Pickup (replaced with CKP)
PKE - Passive Keyless Entry
PLL - Phase Locked Loop
PM - Permanent Magnet
PMD - Pump Mounted Driver
PMV - Pressure Modulator Valve
P/N - Part Number
PNP - Park/Neutral Position
POA - Pilot Operated Absolute
pos - Position
POS - Positive
POT - Potentiometer
P-PC - Pocket Personal Computer
ppm - Parts Per Million
PPS - Passenger Presence Sensor
PRNDL - Park Reverse Neutral Drive Low
PROM - Programmable Read Only Memory
PROX - PReferential OXidation
PS - Power Steering
PSA - Pressure Switch Assembly
PSCM - Passenger Seat Control Module
PSCM - Power Steering Control Module
PSD - Power Sliding Door
psgr - Passenger
psi - Pounds Per Square Inch
psia - Pounds Per Square Inch Absolute
psig - Pounds Per Square Inch Gauge
PSIR - Passenger Supplemental Inflatable Restraint
PSM - Passenger Seat Module
PSOM - Programmable Speedometer/Odometer Module
PSP - Power Steering Pressure
PSV - Public Service Vehicle
PTC - Pending Trouble Code
PTC - Positive Temperature Coefficient
PTO - Power Takeoff
PTOX - Periodic Trap Oxidizer
PTU - Part Throttle Unlock
PWM - Pulse Width Modulation
PWR - Power
PZEV - Partial Zero Emision Vehicle
PZM - Platform Zone Module
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Q
QDM - Quad Driver Module
QDR - Quality, Durability, Reliability
QVM - Qualified Vehicle Modifier
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R
R/A - Resume or Accelerate
RABS - Rear Antilock Brake System
RAC - Remote Accessory Controller
RAM - Random Access Memory
RAM - Ride Air Module
RAM - Remote Anti-theft Module
RAP - Retained Access Power
RAV - Remote Activation Verification
RBC - Rotary Blade Coupling
RCC - Rear Climate Control
RCC - Remote Climate Control
RCDLR - Remote Control Door Lock Receiver
RDCM - Right Door Control Module
RDM - Rear Door Module
RDS - Radio (broadcast) Data System
RDS - Radio Display System
rec - Receive
recal - Recalibrate, Recalibration
RECIS - Remote Entry Control and Immobilizer System
REDOX - Reduction Oxidation Catalytic Converter
REEGR - Rotary Electric EGR
REF - Reference
RESC - Remote Emergency Satellite Unit
REX - Rear Exchanger
RF - Radio Frequency
RF - Right Front
RFA - Remote Function Actuator
RFF - Roller Finger Followers
RFI - Radio Frequency Interference
RFID - Radio Frequency Identification
RFWS - Right Front Wheel Speed
RH - Right Hand
RIM - Radio Interface Module
RIM - Rear Integration Module
RKE - Remote Keyless Entry
Rly - Relay
RM - Relay Module
RMD - Right Mid Door
ROM - Read Only Memory
RPA - Rear Parking Assist
RPM - Remote Power Module
RPM - Revolutions Per Minute
RPO - Regular Production Option
R&R - Remove and Replace
RR - Right Rear
RRD - Right Rear Door
RSA - Rear Seat Audio
RSC - Roll Stability Control
RSS - Reverse Sensing System
RSS - Road Sensing Suspension
R/T - Road/Track
RT - Right
RTC - Real—Time Clock
RTD - Real Time Dampening
RTN - Return
RTT - Reconfigurable Telltale
RTV - Room Temperature Vulcanizing
RV - Recreational Vehicle
RVAC - Rear Video/Audi/HVAC Module
RVP - Reid Vapour Pressure
RWAL - Rear Wheel Anti-lock
RWD - Rear Wheel Drive
RWS - Rear—Wheel Steer
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S
S4WD - Selectable Four Wheel Drive
SAE - Society of Automotive Engineers
SAF - Stabilized Aluminum Foam
SAS - Side Auxiliary Sensor
SATC - Semi-Auto Temperature Control module
SAVDAS - Stand-Alone Vehicle Data Aquisition System
SAW - Spark Angle Word
SB - Short Box, Short Bed
SBDS - Service Bay Diagnostic System
SBEC - Single Board Engine Controller (replaced with PCM)
SBM - Standard Body Module
SBS - Supercharger Bypass Solenoid
SBT - Serial Bus Traveller
SC - Supercharger
SCA - Supplemental Coolant Additive
SCB - Supercharger Bypass
SCCA - Sports Car Club of America
SCI - Serial Communications Interface
SCIL - Steering Column/Instrument panel Lighting
SCM - Seat Control Module
SCP - Standard Corporate Protocol
SCS - Side Crash Sensor
SCTM - Seatbelt Timer Control Module
SCV - Speed Controlled Volume
SDARS - Satellite Digital Audio Radio System
SDL - Serial Data Link
SDM - Sensing and Diagnostic Module
SDRS - Satellite Digital Receiver System
SDS - Satellite Discriminating Sensor
SDS - Shock Dampening System
SDV - Spark Delay Valve
SEFI - Sequential Electronic Fuel Injection (replaced with SFI)
SEMA - Specialty Equipment Market Association
SEO - Special Equipment Option
SES - Service Engine Soon (replaced with MIL)
SFI - Sequential (multiport) Fuel Injection
SGCM - Starter/Generator Control Module
SHO - Super High Output
SI - System International
SIAB - Side Impact Air Bag
SIACM - Side Impact Air Bag Control Module
SIG RTN - Signal Return
SIL - Shift Indicator Lamp
SIR - Supplemental Inflatable Restraint
SIS - Side Impact Sensor
SKIM - Sentry Key Imobilizer Module
SLA - Short/Long Arm suspension
SMCC - Stepper Motor Cruise Control
SMEC - Single Module Engine Controller (replaced with PCM)
SMPI - Sequential Multi-Port Injection
SNSR - Sensor
SO2 - Sulphur Dioxide
SOC - State Of Charge
SOD - Side Object Detection
SOH - State of Health
sol - Solenoid
S/P - Series/Parallel
SP - Splice Pack
SPD - Speed
SPI - Serial Peripheral Interface
SPL - Smoke Puff Limiter
SPS - Service Programming System
SPS - Speed Signal
SPO - Service Parts Operations
SPOUT - Spark Output
SPS - Service Programming System
SRC - Selective Ride Control
SRG - Solar-Reflective Glass
SRI - Service Reminder Indicator
SrPP - Self-reinforced PolyPropylene
SRS - Supplemental Restraint System
SRW - Single Rear Wheel
SS - Shift Solenoid
SS - Speed Signal
SSM - Suspension Steering Module
SSS - 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 System
STC - Snap To Connect
STC - Step Timing Control
stdby - Standby
STI - Self Test Input
STID - Station Identification
STL - Service Transmission Lamp
STO - Self Test Output
STS - Service Technicians Society
SULEV - Super Ultra Low Emission Vehicle
SUV - Sport Utility Vehicle
SVO - Straight Vegetable Oil
SVS - Service Vehicle Soon
SVT - Special Vehicle Team
S/W - Software
sw - Switch
SWB - Short WheelBase (see SB)
SWC - Steering Wheel Controls
SWPS - Steering Wheel Position Sensor
SWS - SideWall tension Sensor
SXR - Send and Receive
syn - Synchronize
sys - System
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T
TAB - Thermactor Air Bypass (replaced with AIRB)
TAC - Throttle Actuator Control
TACH - Tachometer
TACM - Throttle Actuator Control Module
TAD - Thermactor Air Divert (replaced with AIRD)
TAP - Transmission Adaptive Pressure
TAS - Trap Alert System
TB - Throttle Body
TBC - Truck Body Controller (or Computer)
TBI - Throttle Body Fuel Injection
TC - Transmission Control
TC - Turbocharger
TCC - Torque Converter Clutch
TCCS - Toyota Computer Controlled System
TCIL - Transmission Control Indicator Lamp
TCM - Transmission Control Module
TCS - Traction Control System
TCS - Transmission Control Switch
TDC - Top Dead Center
TDI - Toyota Direct Ignition
TED - Thermo Electric Device
tele - Telescope
TEMP - Temperature
TFI - Thick Film Integrated (replaced with DI)
TFP - Transmission Fluid Pressure
TFT - Transmission Fluid Temperature
TGS - Top Gear Switch
THEMIS - Thermal Management Intelligent System
THM - Turbo Hydra-Matic
THS - Transmission Hydraulic Switch
TID - Test Identification
TIIS - Thermal Imaging Inspection Station
TIM - Tire Inflation Module
TIM - Tire Inflation Monitor
TIS - Techline Information System
TOC - Transmission Oil Cooler
torq - Torque
TOT - Transmission Oil Temperature
TP - Throttle Position
TPA - Terminal Positive Assurance
TPI - Tuned Port Injection
TPM - Tire Pressure Monitor
TPS - Throttle Position Sensor
TR - Transmission Range
T-RAC - Trailer Rotating Air Chamber
trans - Transmission/Transaxle
TRDU - Trailer Remote Diagnostic Unit
TRS - Transmission Range Sensor
TSA - Thorax Side Airbag
TSB - Technical Service Bulletin
TSI - Two Speed Idle
TSS - Transmission Speed Sensor
TSS - Turbine Shaft Speed
TT - Telltale Lamp
TTM - Tilt and Telescope Module
TTS - Transmission Temperature Switch (replaced with TOT)
TV - Television
TV - Throttle Valve
TVAM - Televison Antenna Module
TVR - Turbine Vane Regulator
TVRS - Television and Radio Suppression
TVS - Thermal Vacuum Switch
TVV - Thermal Vacuum Valve
TWC - Three Way Catalyst
TWC+OC - Three Way Catalyst + Oxidation Catalyst
twtr - Tweeter
TXV - Thermal Expansion Valve
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U
UASID - Units And Scaling Identification
UART - Universal Asynchronous Receiver-Transmitter
UD - Underdrive
UDDS - Urban Dynamometer Driving Schedule
U/H - Underhood
U/HEC - Underhood Electrical Center
UIDI - Up-Integrated Direct Ignition
ULEV - Ultra Low Emissions Vehicle
ULSD - Ultra Low Sulphur Diesel
UMTS - Universal Mobile Telecommunications System
unlk - Unlock
USCAR - United States Council for Automotive Research
UTD - Universal Theft Deterrent
UTQG - Uniform Tire Quality Grading
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V
V - Volts
V2G - Vehicle to Grid
VAC - Vacuum
VAC - Vehicle Access Code
VACS - Vehicle Access Control System
VAF - Vane Air Flow
VAF - Volume Air Flow
VAPS - Variable Assist Power Steering
VAPS - Virtual Automotive Prototyping System
VASCO - Vehicle Application-Specific Computer
VAT - Vane Air Temperature (replaced with IAT)
VAT - Visual Authoring Tool
VATS - Vehicle AntiTheft System
VB - Valve body
VCC - Viscous Converter Clutch
VCI - Vehicle Communication Interface
VCIM - Vehicle Communication Interface Mode
VCL - Vehicle Communication Link
VCM - Variable Cylinder Management
VCM - Vehicle Communication Module
VCM - Vehicle Control Module
VCRM - Variable Control Relay Module
VCT - Variable Camshaft Timing
VDCS - Vehicle Dynamics Control System
V dif - Voltage Difference
VDIS - Vehicle Diagnostic Information System
VDM - Vehicle Dynamics Module
VDM - Vehicle Dynamics Monitor
VDOT - Variable Displacement Orifice Tube
VDP - Vehicle Dynamics Processor
VDR - Vehicle Data Recorder
VDR - Vehicle Dealer Recorder
VDS - Valve Deactivation System
VDV - Vacuum Delay Valve
VECI - Vehicle Emission Control Information
VEDR - Vehicle Event Data Recorder
veh - Vehicle
vel - Velocity
ver - Version
vert - Vertical
VES - Variable Effort Steering
VF - Vacuum Flourescent
VGT - Variable Geometry Turbocharger
VIC - Virtual Image Cluster module
VICS - Vehicle Information Communication System
VIN - Vehicle Identification Number
VIP - Vehicle Intrusion Protection
VIU - Vehicle Interface Unit
VLCM - Variable Load Control Module
VLR - Voltage Loop Reserve
vlv - Valve
VMM - Vehicle Measurement Module
VMRS - Vehicle Maintenance Reporting System
VMV - Vacuum Modulator Valve
VMV - Vapour Management Valve
VNT - Variable Nozzle Turbine
VNT - Variable Nozzle Turbocharger
VOTM - Vacuum Operated Throttle Modulator
VPWR - Vehicle Power
VR - Vacuum Regulator
VREF - Voltage Reference
VRLA - Valve Regulated Lead Acid
VRV - Vacuum Reducer Valve
VRIS - Variable Resonance Induction System
VS - Variable Speed
VSC - Vehicle Stability Control
VSES - Vehicle Stability Enhancement System
vspd - Vehicle speed
VSS - Vehicle Speed Sensor
VSV - Vacuum Solenoid Valve
VTA - Vehicle Theft Alarm
VTD - Vehicle Theft Deterrent
VTEC - Variable (valve) Timing (and lift) Electronic Control
VTSS - Vehicle Theft Security System
VVT-i - Variable Valve Timing with Intelligence
VVTL-i - Variable Valve Timing and Lift with Intelligence
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W
w/ - With
WAC - Wide Open Throttle A/C Cutoff
warn - Warning
W/B - Wheelbase
WCF - Wireless Communication Framework
WDS - Workbay Diagnostic System
WDS - Worldwide Diagnostic System
WGC - Wastegate Control
WHL - Wheel
WIF - Water In Fuel (sensor)
w/o - Without
WOT - Wide Open Throttle
W/P - Water Pump
WSM - WorkShop Manual
WSS - Wheel Speed Sensor
WU-OC - Warmup Catalyst with Oxidation Catalyst
WU-TWC - Warmup Catalyst with Three Way Catalyst
WVO - Waste Vegetable Oil
WVVWS - Wireless Vehicle to Vehicle Warning System
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X
X-valve - Expansion Valve
xVDS - Extended Vehicle Diagnostic System
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Y yd - Yard

 

Z
ZEV - Zero Emission Vehicle
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This list is not exhaustive.  Your comments or critiques are welcome, as are any additions that you may have.  

Please note that in many of the references provided, the SAE naming methods are not followed.   This may be due to manufacturers not following the SAE protocols when providing acronyms and abbreviations, or because they are common usage.   Whenever possible, most automotive engineers and technical information writers and providers familiarize themselves with SAE specifications J831 and J1930 for electric/electronic terms, SAE J604 for engines, SAE J1145 for emissions, J830 for fuel injection, J139 for ignition, J387 for lighting and J1213/1 for networking/multiplexing. 

Copies of these and all other SAE specifications can be purchased online through the SAE website.


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