1. Historically acceptable common usage
2. Use recommended term only
3. For alphanumeric descriptor, Bold indicates new/revised entry
ACRONYM RECOMMENDED TERM
3-2TS 3-2 Timing Solenoid
AP (1) Accelerator Pedal
APP Accelerator Pedal Position
ACL Air Cleaner
A/C Air Conditioning
A/F Air Fuel Ratio
AAT Ambient Air Temperature
A/T Automatic Transaxle
A/T Automatic Transmission
BARO (1) Barometric Pressure
B+ (1) Battery Positive Voltage
BC Blower Control
BPP Brake Pedal Position
(2) Brake Pressure
BUS N Bus Negative
BUS P Bus Positive
LOAD Calculated Load Value
CMP Camshaft Position
(2) Canister
CO2 Carbon Dioxide
CO Carbon Monoxide
CARB (1) Carburetor
(2) Catalytic Converter Heater
CAC (1) Charge Air Cooler
CC Climate Control
CL Closed Loop
CTP Closed Throttle Position
CPP Clutch Pedal Position
CCS Coast Clutch Solenoid
CVS Constant Volume Sampler
CFI Continuous Fuel Injection
CTOX Continuous Trap Oxidizer
CKP Crankshaft Position
CFV Critical Flow Venturi
DLC (1) Data Link Connector
DTM Diagnostic Test Mode
DTC Diagnostic Trouble Code
DFI Direct Fuel Injection
DI Distributor Ignition
DM Drive Motor
DMCM Drive Motor Control Module
DMCT Drive Motor Coolant Temperature
DMPI Drive Motor Power Inverter
(2) Driver
EFE Early Fuel Evaporation
EEPROM Electrically Erasable Programmable Read Only Memory
EI Electronic Ignition
EC Engine Control
ECM (1) Engine Control Module
ECL Engine Coolant Level
ECT Engine Coolant Temperature
EFT Engine Fuel Temperature
EM Engine Modification
EOP Engine Oil Pressure
EOT Engine Oil Temperature
RPM (1) Engine Speed
EPROM Erasable Programmable Read Only Memory
EVAP (1) Evaporative Emission
EGR Exhaust Gas Recirculation
EGRT Exhaust Gas Recirculation Temperature
EP Exhaust Pressure
4WD Four Wheel Drive
Fan Control FC
FID Flame Ionization Detector
FEEPROM Flash Electrically Erasable Programmable Read Only Memory
FEPROM Flash Erasable Programmable Read Only Memory
FF Flexible Fuel
4GR (1) Fourth Gear
(2), (3) Freeze Frame
FWD Front Wheel Drive
(2) Fuel Level Sensor
(2) Fuel Pressure
FP (1) Fuel Pump
FRP Fuel Rail Pressure
FRT Fuel Rail Temperature
(2), (3) Fuel System Status
FTP Fuel Tank Pressure
FTT Fuel Tank Temperature
FT Fuel Trim
F4WD Full Time Four Wheel Drive
GEN (1) Generator
(2) Glow Plug
(2) Governor
GCM (1) Governor Control Module
GPM Grams Per Mile
GND Ground
HO2S (1) Heated Oxygen Sensor
HCDS High Clutch Drum Speed
HPC High Pressure Cutoff
HC Hydrocarbon
IAC Idle Air Control
ISC Idle Speed Control
IC Ignition Control
ICM (1) Ignition Control Module
IFI Indirect Fuel Injection
IFS Inertia Fuel Shutoff
ICP Injection Control Pressure
ISS Input Shaft Speed
IMT Intake Manifold Tuning
I/M (1) Inspection and Maintenance
IA Intake Air
IAT Intake Air Temperature
IMRC Intake Manifold Runner Control
KS (1) Knock Sensor
MIL (1) Malfunction Indicator Lamp
MAP Manifold Absolute Pressure
MDP Manifold Differential Pressure
MST Manifold Surface Temperature
MVZ Manifold Vacuum Zone
MAF Mass Airflow
MC Mixture Control
MFI Multiport Fuel Injection
NDIR Non Dispersive Infra Red
NVRAM Non-Volatile Random Access Memory
NOX Nitrogen Oxides
OBD On Board Diagnostic
OL Open Loop
ODS Overdrive Drum Speed
OSS Output Shaft Speed
OC Oxidation Catalytic Converter
O2 Oxygen
O2S (1) Oxygen Sensor
PNP Park / Neutral Position
PID Parameter Identification
PTOX Periodic Trap Oxidizer
PCV Positive Crankcase Ventilation
PSP Power Steering Pressure
PSC Power Steering Control
PCM (1) Powertrain Control Module
PC Pressure Control
PR Pressure Relief
PROM Programmable Read Only Memory
PAIR (1) Pulsed Secondary Air Injection
PWM Pulse Width Modulation
RAM Random Access Memory
ROM Read Only Memory
RWD Rear Wheel Drive
RM (1) Relay Module
ST (1) Scan Tool
AIR (1) Secondary Air Injection
S4WD Selectable Four Wheel Drive
SFI Sequential Multiport Fuel Injection
SRI (1) Service Reminder Indicator
SS Shift Solenoid
SPL Smoke Puff Limiter
(2), (3) Spark Advance
(2) Spark Plug
SC (1) Supercharger
SCB Supercharger Bypass
SRT System Readiness Test
TE Thermal Expansion
TVV (1) Thermal Vacuum Valve
3GR (1) Third Gear
TWC+OC Three Way + Oxidation Catalytic Converter
TWC Three Way Catalytic Converter
(2) Throttle Actuator
TAC Throttle Actuator Control
TB (1) Throttle Body
TBI Throttle Body Fuel Injection
TP Throttle Position
TCC (1) Torque Converter Clutch
TCCP Torque Converter Clutch Pressure
TRLHP Track Road Load Horsepower
TCM (1) Transmission Control Module
TFP Transmission Fluid Pressure
TFT Transmission Fluid Temperature
TR Transmission Range
TSS Turbine Shaft Speed
TC (1) Turbocharger
VCRM Variable Control Relay Module
VCM (1) Vehicle Control Module
VIN Vehicle Identification Number
VSS (1) Vehicle Speed Sensor
VR (1) Voltage Regulator
VAF Volume Airflow
WU-OC Warm Up Oxidation Catalytic Converter
WU-TWC Warm Up Three Way Catalytic Converter
WOT Wide Open Throttle