Industry Terminology
Below is a list of industry acronyms and terminology.2WD 2 Wheel Drive
4WD 4 Wheel Drive
A-ELR Automatic - Emergency Locking Retractor
A/C Air-Conditioner
A/C SV Valve Air Conditioning Solenoid Vacuum Valve (A/C Vacuum Switching Valve, A/C VSV)
A/F Air Fuel Mixture Ratio
A/T Automatic Transmission
ABDC After Bottom Dead Center
AC Alternating Current
ADR Australian Desine Rule
AFM Air Flow Meter
AFS Air Flow Sensor
ALDL Assembly Line Diagnostic Link
ALR Automatic Locking Retractor
API American Petroleum Institute
ATDC After Top Dead Center
ATF Automatic Transmission Fluid
B+ Battery Positive Voltage
BBDC Before Bottom Dead Center
BTDC Before Top Dead Center
BVSV Bimetal Vacuum Switching Valve
Batt Battery positive terminal
CAS Crank Angle Sensor
CB Circuit Breaker
CMP Sensor Camshaft Position Sensor (Crank Angle Sensor, CAS)
CMVSS Canadian Motor Vehicle Safety Standard
CO Carbon Monoxide
CPP Switch Clutch Pedal Position Switch (Clutch Switch, Clutch Start Switch)
CPU Central Processing Unit
CRS Child Restraint System
DC Direct Current
DERM Diagnostic Energy Reserve Module
DLC Data Link Connector (Assembly Line Diag. Link, ALDL, Serial Data Link, SDL)
DOHC Double Over Head Camshaft
DOJ Double Offset Joint
DOT Department of Transportation
DRL Daytime Running Light
DSPV Deceleration Sensing
DSPV Deceleration Sensing Proportioning Valve
DTC Diagnostic Trouble Code (Diagnostic Code)
ECM Electronic Control Module
ECM Engine Control Module
ECT Sensor Engine Coolant Temperature Sensor (Water Temp. Sensor, WTS)
ECU Electronic Control Unit
EGR Exhaust Gas Recirculation
EGR Modulator EGR Vacuum Modulator
EGR SV Valve EGR Solenoid Vacuum Valve (EGR Vacuum Switching Valve, EGR VSV)
EGRT Sensor EGR Temperature Sensor (Recirculated Exhaust Gas Temp. Sensor, REGTS)
ELR Emergency Locking Retractor
EPA Environmental Protection Agency
ESA Electronic Spark Advance
EVAP Evaporative Emission
EVAP Canister Evaporative Emission Canister (Charcoal Canister)
EVAP SP Valve EVAP Solenoid Purge Valve
EVAP TVV EVAP Thermal Vacuum Valve (Bimetal Vacuum Switching Valve, BVSV)
FIA Valve Fast Idle Air Valve (Air Valve)
FMVSS Federal Motor Vehicle Safety Standard
GEN Generator
GND Ground
HAC High Altitude Compensator
HC Hydrocarbons
HIC Hot Idle Compensator
HO2S Heated Oxygen Sensor
IAC Valve Idle Air Control Valve (Idle Speed Control Solenoid Valve, ISC Solenoid Valve)
IAT Sensor Intake Air Temperature Sensor (Air Temperature Sensor, ATS)
IG Ignition
ISA Screw Idle Speed Adjusting Screw
ISC Idle Speed Control
ISO International Standards Organization
LCD Liquid Crystal Display
LH Left Hand
LH Left Hand Drive
LSD Limited Slip Differential
LSPV Load Sensing Proportioning Valve
M/T Manual Transmission
MAF Sensor Mass Air Flow Sensor (Air Flow Sensor, AFS, Air Flow Meter, AFM)
MAP Sensor Manifold Absolute Pressure Sensor (Pressure Sensor, PS)
MFI Multiport Fuel Injection (Multipoint Fuel Injection)
MIL Malfunction Indicator Lamp ("CHECK ENGINE" Light)
Max Maximum
Min Minimum
NHTSA National Highway Traffic Safety Organization
NOx Nitrogen Oxides
NOx Oxides of Nitrogen
O2S Oxygen Sensor
OBD On-Board Diagnostic System (Self-Diagnosis Function)
OHC Over Head Camshaft
P/S Power Steering
PCV Positive Crankcase Ventilation
PSP Switch Power Steering Pressure Switch (P/S Pressure Switch)
PTC Positive Temperature Coefficient
PWM Pulse Width Modulation
R
REGTS Recirculated Exhaust Gas Temperature Sensor
RFC Relay Radiator Fan Control Relay (Radiator Fan Motor Relay)
RH Right Hand
RWAL Rear Wheel Anti-Lock Brake
S
SAE Society of Automotive Engineers
SFI Sequential Multiport Fuel Injection
SIR Supplemental Inflatable Restraint
SIR Supplemental Inflatable Restraint (Air Bag)
SOHC Single Over Head Camshaft
SV Valve Solenoid Vacuum Valve
TB Throttle Body
TBI Throttle Body Fuel Injection (Single-Point Fuel Injection, SPI)
TCC Torque Converter Clutch
TCM Transmission Control Module (A/T Controller, A/T Control Module)
TO SV Valve Throttle Opener Solenoid Vacuum Valve (Throttle Opener Vacuum Switching Valve)
TP Sensor Throttle Position Sensor
TPC Valve Tank Pressure Control Valve (2-Way Check Valve)
TPS Throttle Position Sensor
TS Throttle Switch
TS Throttle Switch (Idle switch, WOT Switch)
TVSV Thermal Vacuum Switching Valve
TVV Thermal Vacuum Valve (Thermal Vacuum Switching Valve, TVSV, Bimetal Vacuum Switching Valve, BVSV)
TWC Three Way Catalytic Converter (Three Way Catalyst)
VIN Vehicle Identification Number
VSS Vehicle Speed Sensor
VSV Vacuum Switching Valve
VTV Vacuum Transmitting Valve
WOT Wide Open Throttle
WTG Water Temperature Gauge
WTS Water Temperature Sensor