Abbreviations

List of automotive abbreviations which may be used in shop manual.

ABS Anti-lock Brake System 
A/C Air Conditioning, Air Conditioner 
ACL Air Cleaner 
A/F Air Fuel Ratio 
ALR Automatic Locking Retractor 
ALT Alternator 
AMP Ampere(s) 
ANT Antenna 
API American Petroleum Institute 
APPROX. Approximately 
ASSY Assembly 
A/T Automatic Transmission 
ATDC After Top Dead Center 
ATF Automatic Transmission Fluid 
ATT Attachment 
ATTS Active Torque Transfer System 
AUTO Automatic 
AUX
 
Auxiliary
 
BARO Barometric 
BAT Battery 
BDC Bottom Dead Center 
BTDC
 
Before Top Dead Center
 
CARB Carburetor 
CAT Catalytic Converter 
or CATA 
CHG Charge 
CKF Crankshaft Speed Fluctuation 
CKP Crankshaft Position 
CO Carbon Monoxide 
COMP Complete 
CPB Clutch Pressure Back up 
CPC Clutch Pressure Control 
CPU Central Processing Unit 
CVT Continuously Variable Transmission 
CYL Cylinder 
CYP
 
Cylinder Position
 
DI Distributor Ignition 
DIFF Differential 
DLC Data Link Connector 
DOHC Double Overhead Camshaft 
DPI Dual Point Injection 
DTC
 
Diagnostic Trouble Code
 
EBD Electronic Brake Distribution 
ECM Engine Control Module 
ECT Engine Coolant Temperature 
EGR Exhaust Gas Recirculation 
ELD Electrical Load Detector 



EPR Evaporator Pressure Regulator 
EPS Electrical Power Steering 
EVAP Evaporative 
EX
 
Exhaust
 
Front 
FIA Fuel Injection Air 
FL Front Left 
FP Fuel Pump 
FR Front Right 
FSR Fail Safe Relay 
FWD
 
Front Wheel Drive
 
GAL Gallon 
GND Ground 
GPS
 
Global Positioning System
 
H/B Hatchback 
HC Hydrocarbons 
HID High Intensity Discharge 
HO2S
 
Heated Oxygen Sensor
 
IAB Intake Air Bypass 
IAC Idle Air Control 
IACV Idle Air Control Valve 
IAR Intake Air Resonator 
IAT Intake Air Temperature 
ICM Ignition Control Module 
ID Identification 
ID or I.D. Inside Diameter 
IG or IGN Ignition 
IMA Idle Mixture Adjustment 
Integrated Motor Assisted 
IMMOBI. Immobilizer (Immobiliser) 
IN Intake 
INJ Injection 
INT
 
Intermittent
 
KS
 
Knock Sensor
 
Left 
L/C Lock-up Clutch 
LCD Liquid Crystal Display 
LED Light Emitting Diode 
LEV Low Emission Vehicle 
LF Left Front 
LH Left Handle 
LHD Left Handle Drive 
LR Left Rear 
LSD Limited Slip Differential 
L-4 In-line Four Cylinder (engine) 

MAP Manifold Absolute Pressure 
MAX. Maximum 
MBS Mainshaft Brake System 
MCK Motor Check 
MCU Moment Control Unit 
MIL Malfunction Indicator Lamp 
MIN. Minimum 
MPI Multi Point Injection 
M/S Manual Steering 
M/T
 
Manual Transmission
 
Neutral 
NOx
 
Oxides of Nitrogen
 
OBD On-board Diagnostic 
O2S Oxygen Sensor 
OD or O.D.
 
Outside Diameter
 
Park 
PAIR Pulsed Secondary Air Injection 
PCM Powertrain Control Module 
PCV Positive Crankcase Ventilation 
Proportioning Control Valve 
PDU Power Drive Unit 
PGM-FI Programmed-fuel Injection 
PGM-IG Programmed Ignition 
PH Pressure High 
PL Pilot Light or Pressure Low 
PMR Pump Motor Relay 
P/N Part Number 
PRI Primary 
P/S Power Steering 
PSF Power Steering Fluid 
PSP Power Steering Pressure 
PSW
 
Pressure Switch
 
Qty
 
Quantity
 
Right 
REF Reference 
RGB Red, Green, Black 
RH Right Handle 
RHD Right Handle Drive 
RL Rear Left 
RON Research Octane Number 
RR
 
Rear Right
 
SAE Society of Automotive Engineers 
SCS Service Check Signal 
SEC Second 
Secondary 
SOHC Single Overhead Camshaft 
SOL Solenoid 

SPEC Specification 
S/R Sun Roof 
SRS Supplemental Restraint System 
STD Standard 
SW
 
Switch
 
Torque 
TB Throttle Body 
T/B Timing Belt 
TC Torque Converter 
TCM Transmission Control Module 
TCS Traction Control System 
TDC Top Dead Center 
TFT Thin Film Transistor 
T/N Tool Number 
TP Throttle Position 
TWC
 
Three Way Catalytic Converter
 
VC Viscous Coupling 
VIN Vehicle Identification Number 
VSS Vehicle Speed Sensor 
VTEC Variable Valve Timing & Valve Lift Electronic Control 
VVIS
 
Variable Volume Intake System
 
With 
W/O Without 
WOT
 
Wide Open Throttle
 
2WD Two Wheel Drive 
4WD Four Wheel Drive 
2WS Two Wheel Steering 
4WS Four Wheel Steering 
4AT 4-speed Automatic Transmission 
5MT 5-speed Manual Transmission 
6MT 6-speed Manual Transmission 
[P] Park 
[R] Reverse 
[N] Neutral 
[D4] Drive (1st through 4th gear) 
[D3] Drive (1st through 3rd gear) 
[2] Second 
[1] First 
[D] Drive 
[S] Second 
[L] Low 
O/D Over Drive 
1ST Low (gear) 
2ND Second (gear) 
3RD Third (gear) 
4TH Fourth (gear) 
5TH Fifth (gear) 
6TH Sixth (gear)