Automotive terms/abbreviations/definitions

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by: Cobalt327
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[edit] Resources

[edit] Automotive terms

"A"

A - Amperes

ABS - Anti-Lock Brakes

ABRS - Air Bag Restraint System

AC - Alternating Current

A/C - Air Conditioning

ACCS - A/C Cycling Switch

ACCUM - Accumulator

ACCY - Accessory

ACT - Air Charge Temperature Sensor

ADV - Advance

AFS - Airflow Sensor

AFR - Air Fuel Ratio (also see below)

A/F - Air/Fuel Ratio

AI - Air Injection

AIR or A.I.R. - Air Injection Reactor

AIS - Air Injection System

Alt. - Alternator or Altitude

ALDL - Assembly Line Data Link

Amp - /amp/amps: Ampere

APS - Absolute Pressure Sensor

APPS - Accelerator Pedal Position Sensor

ASCS - Air Suction Control Solenoid

ASD - Auto Shutdown

ASDM - Air Bag System Diagnostic Module

ASV - Air Suction Valve

A/T - Automatic Transmission/Transaxle

ATC - Automatic Temperature Control

ATDC - After Top Dead Center

ATF - Automatic Transmission Fluid

ATS - Air Temperature Sensor

AWD - All Wheel Drive


"B"

B+ - Battery Positive Voltage

BAC - By-Pass Air Control

BAP - Barometric Absolute Pressure Sensor

BARO - Barometric

Batt. - Battery

Bbl. - Barrel (Example: 4-Bbl.)

BCM - Body Control Module

BHP - Brake Horsepower

BMAP - Barometric and Manifold Absolute Pressure Sensor

BOO - Brake On-Off Switch

B/P - Backpressure

BPS - Barometric Pressure Sensor

BPT - Backpressure Transducer

BTDC - Before Top Dead Center

BTU - British Thermal Unit


"C"

C - Celsius (Degrees)

CAN - Controller Area Network

CANP - Canister Purge

CAS - Crank Angle Sensor

CARB - California Air Resources Board

CAT - Catalytic Converter

CB - Circuit Breaker

CBD - Closed Bowl Distributor

CC - cubic centimeter

CCC - Computer Command Control

CCD - Computer Controlled Dwell

CCOT - Cycling Clutch Orifice Tube

CCW - Counterclockwise

CDI - Capacitor Discharge Ignition

CEC - Computerized Engine Control

CID - Cubic Inch Displacement

CM - Centimeter

CMP - Camshaft Position Sensor

CO - Carbon Monoxide

CO2 - Carbon Dioxide

Cont. - Continued

CONV - Convertible

CP - Canister Purge

CKP - Crankshaft Position Sensor

COP - Coil On Plug Ignition

CPI - Central Port Injection

CPU - Central Processing Unit

CSSA - Cold Start Spark Advance

CSSH - Cold Start Spark Hold

CTS - Coolant Temperature Sensor

CTVS - Choke Thermal Vacuum Switch

Cu. In. - Cubic Inch

CVC - Constant Vacuum Control

CVCC - Controlled Vortex Combustion Chamber

CVR - Control Vacuum Regulator

CV - Check Valve or Constant Velocity

CVVT- Continuous Variable Valve Timing

CW - Clockwise

CYL or Cyl. - Cylinder


"D"

D - Drive

dB - Decibels

DC - Direct Current Or Discharge

DDD - Dual Diaphragm Distributor

Def. - Defrost

Defog. - Defogger

DEFI - Digital Electronic Fuel Injection

DERM - Diagnostic Energy Reserve Module

DFI - Digital Fuel Injection

DFS - Deceleration Fuel Shutoff

Diag. - Diagnostic

DIC - Driver Information Center

DIS - Distributorless Ignition System

DIST - Distribution

DLC - Data Link Connector

DMM - Digital Multi Meter

DOHC - Double Overhead Cam

DTC - Diagnostic Trouble Code

DOT - Department of Transportation

DRB-II - Diagnostic Readout Box

DVOM - Digital Volt-Ohmmeter


"E"

EACV - Electronic Air Control Valve

EBCM - Electronic Brake Control Module

EBL - Electronic Back Light

EBM - Electronic Body Module

ECA - Electronic Control Assembly

ECM - Engine Control Module

ECT - Engine Coolant Temperature

ECU - Electronic Control Unit

EDIS - Electronic Distributorless Ignition System

EEC - Electronic Engine Control

EECS - Evaporative Emission Control System

EEPROM - Electronically Erasable Programmable Read Only Memory

EFC - Electronic Fuel Control

EFCA - Electronic Fuel Control Assembly

EFE - Early Fuel Evaporation

EFI - Electronic Fuel Injection

EGO - Exhaust Gas Oxygen Sensor

EGR - Exhaust Gas Recirculation

EGRPS - EGR Valve Position Sensor

EGRT - EGR Temperature

EGT - Exhaust Gas Temperature

EI - Electronic Ignition

EMI - Electromagnetic Interference

EMR - Electronic Module Retard

EOS - Exhaust Oxygen Sensor or Engine Oil Suppliment

EOBD - European Onboard Diagnostics

EPOS - EGR Valve Position Sensor

EPROM - Erasable Programmable Read Only Memory

ESA - Electronic Spark Advance

ESC - Electronic Spark Control

EST - Electronic Spark Timing

ETC - Electronic Throttle Control

EVAP - Evaporative Emission System

EVIC - Electronic Vehicle Information Center

EVP - EGR Valve Position


"F"

F - Fahrenheit

F/B - Fuse Block

FCS - Fuel Control Solenoid

Fed - Federal

FDC - Fuel Deceleration Valve

FI - Fuel Injection

FIPL - Fuel Injector Pump Lever

FPR-VSV - Fuel Pressure Regulator Vacuum Switching Valve

FLS - Fluid Level Sensor

ft.lb. - Foot Pound

FWD - Front-Wheel Drive


"G"

G - Grams

GALS - Gallon

GDI - Gasoline Direct Injection

GEN - Generator

GND or GRND - Ground

GPS - Global Positioning System

GVW - Gross Vehicle Weight


"H"

H20 - Water

HAC - High Altitude Compensation

HC - Hydrocarbons

H/D - Heavy Duty

HEGO - Heated Exhaust Gas Oxygen Sensor

HEI - High Energy Ignition

Hg - Mercury

HGT - Height

HLDT - Headlight

HO - High Output

HO2S - Heated Oxygen Sensor

HP - High Performance or Horsepower

HSC - High Swirl Combustion

HSO - High Specific Output

HT - High Tension

HTR - Heater

Hz - Hertz(Cycles Per Second)


"I"

IACV - Idle Air Control Valve

IAT - Intake Air Temperature

IATS - Intake Air Temperature Sensor

IC - Integrated Circuit

ICM - Ignition Control Module

ICS - Idle Control Solenoid

I.D. - Inside Diameter

ID - Identification

IFI - Indirect Fuel Injection

IGN - Ignition

In. - Inches

Inch Lbs. - Inch Pounds

in. Hg - Inches of Mercury

Inj. - Injector

IMRC - Intake Manifold Runner Control

IP - Instrument Panel (also see below)

IP - Injector Pump (diesel applications)

ISC - Idle Speed Control

ISO - International Standards Organization

ITCS - Ignition Timing Control System

ITS - Idle Tracking Switch

IVSV - Idle Vacuum Switching Valve


"J"

JAS - Jet Air System

J/B - Junction Block


"K"

k/ohms - kilo-ohms or Kilohms (1000 ohms)

kg - kilograms (weight)

kg/cm - Kilograms Per Square Centimeter

kHz - Kilohertz

Km - Kilometers

KM/H - Kilometers Per Hour

KOEC - Key On, Engine Cranking

KOEO - Key On, Engine Off

KOER - Key On, Engine Running

kPa - kilopascals

KS - Knock Sensor

kV - Kilovolt

kW – Kilowatt


"L"

L - Liter

lbs. - Pounds

lb./ft. - Pound Feet

LCD - Liquid Crystal Display

L/D - Light Duty

LED - Light Emitting Diode

LHD - Left-Hand Drive

LTFT - Long Term Fuel Trim

LWB - Long Wheel-Base


"M"

mA - Milliamps

MA/MAF - Mass Air Flow

MAFS - Mass Air Flow Sensor

MAP - Manifold Absolute Pressure

MAT - Manifold Air Temperature

MCS - Mixture Control Solenoid

MCT - Manifold Charge Temperature

Mem. - Memory

MEM/CAL - Memory Calibration Chip

mfd. - Microfarads

MFI - Multiport Fuel Injection

MIL - Malfunction Indicator Light

mm - Millimeters

MPG - Miles Per Gallon

MPH - Miles Per Hour

MPI - Multi-Point (Fuel) Injection

MPV - Multi-Purpose Vehicle

ms - Millisecond

mV - Millivolts


"N"

NA - Not Available

NBO2 - Narrow Band Oxygen Sensor

NGC - New Generation Controller

NGS - New Generation Star

N.m - Newton Meter

No. - Number

Nos. - Numbers

NOx - Oxides of Nitrogen

NVRAM - Nonvolatile Random Access Memory


"O"

O2 - Oxygen

O2S - Oxygen Sensor

OBD - On-board Diagnostics

OBD I - On-board Diagnostics One

OBD II - On-board Diagnostics Two

OBD III - On-board Diagnostics Three

OC - Oxidation Catalyst

OD - Overdrive

O.D. - Outside Diameter

OE - Original Equipment

OEM - Original Equipment Manufacturer

OHC - Over Head Camshaft

OHV - Over Head Valve

O/S - Oversize

OS - Oxygen Sensor

oz. - Ounce

ozs. - Ounces


"P"

P - Park

P/B - Power Bakes

P/C - Printed Circuit

P/N - Part Number

PA - Pressure Air

PAS - Power-Assisted Steering

PCM - Powertrain Control Module

PCS/PC/SOL - Purge Control Solenoid

PCV - Positive Crankcase Ventilation

PECV - Power Enrichment Control Valve

PFI - Port Fuel Injection

PGM-FI - Programmed Fuel Injection

PID - Parameter Identification

PIP - Profile ignition pick-up

PNP - Park Neutral Position Switch

P/N - Park/Neutral

PPM - Parts Per Million

PRNDL - Park Reverse Neutral Drive Low

PROM - Program Read Only Memory (chip)

P/S - Power Steering

PSI - Pounds Per Square Inch

PSP - Power Steering Pressure

PSPS - Power Steering Pressure Switch

pts. - Pints

Pwr. - Power

PWR - Power to Weight Ratio


"R"

R/A - Resume or Accelerate

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

RCM - Restraint Control Module

RDM - Rear Door Module

RDS - Radio Display System

REC - Receive

RECAL - Recalibrate

RECIRC - Recirculation

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

ROM - Read Only Memory

RPM - Revolutions Per Minute

RPO - Regular Production Option

R&R - Remove and Replace

RR - Right Rear

RSA - Rear Seat Audio

RSC - Roll Stability Control

RSS - Road Sensing Suspension

R/T - Road/Track

RT - Right

RTD - Real Time Dampening

RTN - Return

RV - Recreational Vehicle

RWAL - Rear Wheel Anti-lock

RWD - Rear Wheel Drive

RWS - Rear Wheel Steer


"S"

SBC - Single Bed Converter

SBD - Strategy Base Diagnostics

SC - Supercharged

SEFI - Sequential Electronic Fuel Injection

SES - Service Engine Soon

SFI - Sequential Fuel Injection

SIR - Supplemental Inflatable Restraint

SIPS - Side Impact Protection System

SOHC - Single Overhead Cam

SPFI - Sequential Port Fuel Injection

SPOUT - Spark Output

SPK - Spark Control

SOL/Sol. - Solenoid

SRI - Service Reminder Indicator

SRS - Secondary Restraint System

SRS - Supplemental Restraint System

SSI - Solid State Ignition

STAR - Self-Test Automatic Readout

STFT - Short Term Fuel Trim

STO - Self-Test Output

Sw. - Switch

SWB - Short Wheel-Base

Sys. - System


"T"

TACH - Tachometer

TBI - Throttle Body Injection

TCC - Torque Converter Clutch

TCM - Transmission or Transaxle Control Module

TCS - Traction control solenoid

TD - Turbo Diesel

TDC - Top Dead Center

TDI - Turbo Direct Injection

Temp. - Temperature

THERMAC - Thermostatic Air Cleaner

TIV - Thermactor Idle Vacuum Valve

TKS - Throttle Kicker Solenoid

TPI - Tuned Port Injection

TPP - Throttle Position Potentiometer

TPS - Throttle Position Sensor/Switch

TPT - Throttle Position Transducer

TS - Temperature Sensor

TSP - Throttle Solenoid Positioner

TV - Throttle Valve

TV - Thermovalve

TVS - Thermal Vacuum Switch

TWC - Three Way Catalyst


"U"

U/S - Undersize


"V"

Vac. - Vacuum

VAF - Vane Airflow

VAPS - Variable Assist Power Steering

VCC - Viscous Converter Clutch

VCRM - Variable Control Relay Module

VIN - Vehicle Identification Number

VM - Vacuum Modulator

VOLT. - Voltage

VOM - Volt/Ohmmeter

VRV - Vacuum Regulator Valve

VSS - Vehicle Speed Sensor

VSV - Vacuum Switching Valve

VVC - Variable Valve Control

VVT - Variable Valve Timing

VVT-i - Variable Valve Timing with intelligence (controlled by the ECM)


"W"

W/ - With

WB02 - Wide Band Oxygen Sensor

W/O - Without

WAC - Wide Open Throttle A/C Switch

WOT - Wide Open Throttle

[edit] British to American

Around the world there are some differences in the words used to describe things in the automotive field.

  • Accumulator = battery, car battery
  • Bonnet = hood
  • Boot = trunk
  • Dynamo = generator
  • Earth wire = ground wire
  • Follower or tappet = lifter (tappet also used in the US, mostly in reference to the type of cam, i.e. "flat tappet").
  • Harmonic balancer/damper = crankshaft pulley
  • Inlet manifold = intake manifold
  • Lorry = truck
  • Number plate = license plate
  • Petrol = gasoline
  • Saloon = "sedan" or 4-door car
  • "Semi" = duplex, duplex house; U.S. "semi" = tractor-trailer truck rig
  • Windscreen (automotive) = windshield
  • Wing (older vehicles) = fender, bumper


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