| 4WD |
Four-Wheel Drive |
| A/C |
air conditioning |
| A/F |
air/fuel ratio |
| A/T |
automatic transmission or transaxle |
| A/T |
automatic transmission |
| AAA |
American Automobile Association |
| AAV |
anti-afterburn valve (Mazda) |
| ABS |
Anti-Lock Braking System |
| ABSV |
air bypass solenoid valve (Mazda) |
| AC |
air cleaner |
| AC |
Air Conditioning |
| AC |
alternating current |
| ACTS |
air charge temperature sensor (Ford) |
| AERA |
Automotive Engine Rebuilders Assn. |
| AFM |
air flow meter |
| AFS |
air flow sensor (Mitsubishi) |
| AIR |
secondary air injection |
| AIR |
Air Injection Reaction (GM) |
| AIR |
secondary air injection |
| AIR |
Air Injection Reaction (GM) |
| AIS |
Air Injection System (Chrysler) |
| AIS |
automatic idle speed motor (Chrysler) |
| ALCL |
assembly line communications link (GM) |
| ALDL |
assembly line data link (GM) |
| AMG |
Aufrecht, Melcher, Grossaspach (see www.mbusa.com) |
| API |
American Petroleum Institute |
| APS |
absolute pressure sensor (GM) |
| APS |
atmospheric pressure sensor (Mazda) |
| APS |
absolute pressure sensor (GM) |
| ASD |
automatic shutdown relay (Chrysler) |
| ASDM |
airbag system diagnostic module (Chrysler) |
| ASE |
Automotive Service Excellence |
| ATC |
after top center |
| ATDC |
after top dead center |
| ATF |
automatic transmission fluid |
| ATMC |
Automotive Training Managers Council |
| ATS |
air temperature sensor (Chrysler) |
| ATV |
All Terrain Vehicle |
| AWD |
All-Wheel Drive |
| AWD |
all-wheel drive |
| B+ |
battery positive voltage |
| BARO |
barometric pressure sensor (GM) |
| BARO |
barometric pressure |
| BAT |
battery |
| BCM |
body control module (GM) |
| BHP |
brake horsepower |
| BID |
Breakerless Inductive Discharge (AMC) |
| BMAP |
barometric/manifold absolute pressure sensor (Ford) |
| BMW |
Bayerische Motoren Werke (Bavarian Motor Works) |
| BP |
backpressure sensor (Ford) |
| BPS |
barometric pressure sensor (Ford & Nissan) |
| BPT |
back-pressure transducer |
| BTC |
before top center |
| BTDC |
before top dead center |
| Btu |
British thermal units |
| C |
Celsius |
| C3 |
Computer Command Control system (GM) |
| C3I |
Computer Controlled Coil Ignition (GM) |
| C4 |
Computer Controlled Catalytic Converter system (GM) |
| CAA |
Canadian Auto Association |
| CAAT |
Council of Advanced Automotive Trainers |
| CAC |
charge air cooler |
| CAFE |
Corporate Average Fuel Economy |
| CAFE |
corporate average fuel economy |
| CALPAK |
calibration pack |
| CANP |
canister purge solenoid valve (Ford) |
| CARB |
California Air Resources Board |
| CAS |
Clean Air System (Chrysler) |
| CAS |
crank angle sensor |
| CAS |
Clean Air System (Chrysler) |
| CAS |
crank angle sensor |
| CC |
catalytic converter |
| CC |
cubic centimeters |
| CCC |
Computer Command Control system (GM) |
| CCD |
computer controlled dwell (Ford) |
| CCEI |
Coolant Controlled Idle Enrichment (Chrysler) |
| CCEV |
Coolant Controlled Engine Vacuum Switch (Chrysler) |
| CCOT |
clutch cycling orifice tube |
| CCP |
controlled canister purge (GM) |
| CCV |
canister control valve |
| CCV |
canister control valve |
| CDI |
Capacitor Discharge Ignition (AMC) |
| CEAB |
cold engine air bleed |
| CEC |
Crankcase Emission Control System (Honda) |
| CECU |
central electronic control unit (Nissan) |
| CER |
cold enrichment rod (Ford) |
| CESS |
cold engine sensor switch |
| CFC |
Chlorofluorocarbons |
| CFI |
continuous fuel injection |
| CFI |
Cross Fire Injection (Chevrolet) |
| cfm |
cubic feet per minute |
| CID |
cylinder identification sensor (Ford) |
| CID |
cubic inch displacement |
| CIS |
Continuous Injection System (Bosch) |
| CKP |
crankshaft position sensor |
| CKP |
REF crankshaft reference |
| CKP |
crankshaft position sensor |
| CKP |
REF crankshaft reference |
| CL |
closed loop |
| CMP |
camshaft position sensor |
| CMP |
REF camshaft reference |
| CMP |
camshaft position sensor (GM) |
| CMP |
camshaft position sensor |
| CMP |
REF camshaft
reference |
| CMP |
camshaft position sensor (GM) |
| CO |
carbon monoxide |
| CO2 |
carbon dioxide |
| COP |
Coil On Plug ignition |
| CP |
canister purge (GM) |
| CP |
crankshaft position sensor (Ford) |
| CP |
canister purge (GM) |
| CP |
crankshaft position sensor (Ford) |
| CPI |
Central Port Injection (GM) |
| CPP |
clutch pedal position |
| CPU |
central processing unit |
| CSC |
Coolant Spark Control (Ford) |
| CSSA |
Cold Start Spark Advance (Ford) |
| CSSH |
Cold Start Spark Hold (Ford) |
| CTAV |
Cold Temperature Actuated Vacuum (Ford) |
| CTO |
Coolant Temperature Override Switch (AMC) |
| CTOX |
continuous trap oxidizer |
| CTP |
closed throttle position |
| CTS |
charge temperature switch (Chrysler) |
| CTS |
coolant temperature sensor (GM) |
| CTS |
charge temperature switch (Chrysler) |
| CTS |
coolant temperature sensor (GM) |
| CTVS |
choke thermal vacuum switch |
| CVCC |
Compound Vortex Controlled Combustion system (Honda) |
| CVR |
control vacuum regulator (Ford) |
| dB |
decibels |
| DC |
direct current |
| DEFI |
Digital Electronic Fuel Injection (Cadillac) |
| DEPS |
digital engine position sensor |
| DERM |
diagnostic energy reserve module (GM) |
| DFCO |
decel fuel cut-off mode |
| DFI |
direct fuel injection |
| DFS |
deceleration fuel shutoff (Ford) |
| DIS |
Distributorless Ignition System (Ford) |
| DIS |
Direct Ignition System (GM) |
| DLC |
data link connector (GM) |
| DOHC |
Dual Overhead Camshafts |
| DOT |
Department of Transportation |
| DRBII |
Diagnostic Readout Box (Chrysler) |
| DRCV |
distributor retard control valve |
| DSSA |
Dual Signal Spark Advance (Ford) |
| DTC |
diagnostic trouble code |
| DTM |
diagnostic test mode |
| DVDSV |
differential vacuum delay and separator valve |
| DVDV |
distributor vacuum delay valve |
| DVOM |
digital volt ohm meter |
| EACV |
electronic air control valve (Honda) |
| EBCM |
electronic brake control module (GM) |
| EBCM |
electronic brake control module |
| EBM |
electronic body module (GM) |
| EBTCM |
electronic brake traction control module |
| EC |
engine control |
| ECA |
electronic control assembly |
| ECCS |
Electronic Concentrated Control System (Nissan) |
| ECL |
engine coolant level |
| ECM |
electronic control module (GM) |
| ECS |
Evaporation Control System (Chrysler) |
| ECT |
engine coolant temperature (Ford & GM) |
| ECT |
engine coolant temperature (Ford & GM) |
| ECU |
electronic control unit (Ford, Honda & Toyota) |
| EDIS |
Electronic Distributorless Ignition System (Ford) |
| EEC |
Evaporative Emission Controls (Ford) |
| EEC |
Electronic Engine Control (Ford) |
| EEC |
Electronic Engine Control (Ford) |
| EECS |
Evaporative Emissions Control system (GM) |
| EEPROM |
elecrically erasable programmable read only memory |
| EEPROM |
electronically erasable programmable read only memory chip |
| EFC |
electronic fuel control |
| EFC |
electronic feedback carburetor (Chrysler) |
| EFCA |
electronic fuel control assembly (Ford) |
| EFE |
Early Fuel Evaporation system (GM) |
| EFI |
Electronic Fuel Injection |
| EFI |
electronic fuel injection |
| EGO |
exhaust gas oxygen sensor (Ford) |
| EGR |
exhaust gas recirculation |
| EGRPS |
EGR valve position sensor (Mazda) |
| EGR-SV |
EGR solenoid valve (Mazda) |
| EGRT |
EGR temperature |
| EGRTV |
EGR thermo valve (Chrysler) |
| EI |
electronic ignition (GM) |
| ELB |
Electronic Lean Burn (Chrysler) |
| EM |
engine modification |
| EMI |
electromagnetic interference |
| EOS |
exhaust oxygen sensor |
| EPA |
Environmental Protection Agency |
| EPOS |
EGR valve position sensor (Ford) |
| EPROM |
erasable programmable read only memory chip |
| ESA |
Electronic Spark Advance (Chrysler) |
| ESC |
Electronic Spark Control (GM) |
| ESS |
Electronic Spark Selection (Cadillac) |
| EST |
Electronic Spark Timing (GM) |
| EVAP |
evaporative emission system |
| EVP |
EGR valve position sensor (Ford) |
| EVRV |
electronic vacuum regulator valve for EGR (GM) |
| F |
Fahrenheit |
| FBC |
feedback carburetor system (Ford & Mitsubishi) |
| FBCA |
feedback carburetor actuator (Ford) |
| FC |
fan control |
| FCA |
fuel control assembly (Chrysler) |
| FCS |
fuel control solenoid (Ford) |
| FDC |
fuel deceleration valve (Ford) |
| FEEPROM |
flash electrically erasable programmable read only memory |
| FF |
flexible fuel |
| FI |
fuel injection |
| FIAT |
Fabbrica Italiana Automobili Torino |
| FLS |
fluid level sensor (GM) |
| FMVSS |
Federal Motor Vehicle Safety Standards |
| FP |
fuel pump |
| FPROM |
flash erasable programmable
read only memory |
| FT |
fuel trim |
| ft.lb. |
foot pound |
| FTP |
federal test procedure |
| FWD |
front-wheel drive |
| gal |
gallon |
| GCM |
governor control module |
| GEN |
generator |
| GM |
General Motors |
| GMC |
General Motors Corporation |
| GND |
ground |
| GPM |
grams per mile |
| GT |
Gran Turismo or Grand Tourism |
| GTO |
Grand Tourism Over (refers to engine displacement compared to the
competition maximum for the GT category) |
| GTU |
Grand Tourism Under (refers to engine displacement compared to the
competition maximum for the GT category) |
| H20 |
water |
| HAIS |
Heated Air Intake System (Chrysler) |
| HC |
hydocarbon |
| HEGO |
heated exhaust gas oxygen sensor |
| HEI |
High Energy Ignition (GM) |
| HEMI |
Hemispherical Combustion Chamber |
| Hg |
mercury |
| HO2S |
heated oxygen sensor |
| HO2S1 |
upstream heated oxygen sensor |
| HO2S2 |
up or downstream heated oxygen sensor |
| HO2S3 |
downstream heated oxygen sensor |
| hp |
horsepower |
| HVAC |
heating ventilation and air conditioning system |
| HVS |
high voltage switch |
| I/M |
inspection/maintenance |
| I/P |
instrument panel |
| IA |
intake air |
| IAC |
idle air control (GM) |
| IAT |
inlet air temperature sensor (Ford) |
| IATS |
intake air temperature sensor (Mazda) |
| IC |
integrated circuit |
| IC |
ignition control circuit |
| ICM |
ignition control module |
| ICM |
ignition control module |
| ICS |
idle control solenoid (GM) |
| ID |
inside diameter |
| IFI |
indirect fuel injection |
| IFS |
Infiniti Financial Services |
| IFS |
inertia fuel shutoff |
| IGN |
ignition |
| IHI |
Ishikawajima Harima Heavy Industries (turbo manufacturers) |
| IM240 |
inspection/maintenance 240 program |
| IPC |
instrument panel cluster |
| ISC |
idle speed control (GM) |
| ISO |
International Standards Organization |
| ITCS |
Ignition Timing Control System (Honda) |
| ITS |
idle tracking switch (Ford) |
| JAS |
Jet Air System (Mitsubishi) |
| kHz |
kilohertz |
| KKK |
Kuhnle, Kopp & Kausch (turbo manufacturers) |
| Km |
kilometers |
| KOEC |
key on, engine cranking |
| KOEO |
key on, engine off |
| KOER |
key on, engine running |
| kPa |
kilopascals |
| KS |
knock sensor |
| KSM |
knock sensor module |
| KV |
kilovolts |
| L |
liters |
| lb. ft. |
pound feet |
| LCD |
liquid crystal display |
| LED |
light emitting diode |
| LT |
long term fuel trim |
| LTD |
Limited |
| LTFT |
long term fuel trim |
| MACS |
Mobile Air Conditioning Society |
| MAF |
mass airflow sensor |
| MAMA |
Midwest Automotive Media Assn. |
| MAP |
manifold absolute pressure |
| MAP |
Motorist Assurance Program |
| MAT |
manifold air temperature |
| MC |
mixture control |
| MCS |
mixture control solenoid (GM) |
| MCT |
manifold charge temperature (Ford) |
| MCU |
Microprocessor Controlled Unit (Ford) |
| MDP |
manifold differential pressure |
| MDP |
manifold differential pressure |
| MFI |
multiport fuel injection |
| MIL |
malfunction indicator lamp |
| MISAR |
Microprocessed Sensing and Automatic Regulation (GM) |
| mm |
millimeters |
| MPFI |
multi point fuel injection |
| MPG |
Miles Per Gallon |
| MPH |
miles per hour |
| MPI |
multi port injection |
| MR2 |
Mid-engine Runabout/Rear-drive two-seater (Toyota) |
| ms |
millisecond |
| MSDS |
material safety data sheet |
| MST |
manifold surface temperature |
| mV |
millivolts |
| MVZ |
manifold vacuum zone |
| NACAT |
National Assn. of College Automotive Teachers |
| NATEF |
National Automotive Technician's Education Foundation |
| NHTSA |
National Highway Traffic Safety Administration |
| Nm |
Newton meters |
| NMAC |
Nissan Motor Acceptance Corporation |
| NOX |
oxides of nitrogen |
| NVRAM |
nonvolatile randon access memory |
| O2S |
oxygen sensor |
| OBD |
onboard diagnostics |
| OBD I |
onboard diagnostics generation one |
| OBD II |
onboard diagnostics, second generation |
| OC |
oxidation catalyst |
| OC |
oxidation converter (GM) |
| OD |
outside diameter |
| ODM |
output device monitor |
| OE |
original equipment |
| OEM |
Original Equipment Manufacturer (usually in reference to car parts) |
| OHC |
overhead cam |
| OHV |
Overhead valve |
| OL |
open loop |
| ORC |
oxidation reduction catalyst (GM) |
| OS |
oxygen sensor |
| OSAC |
Orifice Spark Advance Control (Chrysler) |
| OSC |
oxygen sensor storage |
| P/B |
power brakes |
| P/N |
part number |
| PA |
pressure air (Honda) |
| PAFS |
Pulse Air Feeder System (Chrysler) |
| PAIR |
pulsed secondary air injection |
| PAIR |
Pulsed Secondary Air Injection system (GM) |
| PAIR |
pulsed secondary air injection |
| PCM |
powertrain control module (supercedes ECM) |
| PCV |
positive crankcase ventilation |
| PECV |
power enrichment control valve |
| PERA |
Production Engine Rebuilders Assn. |
| PFI |
port fuel injection (GM) |
| PGM-FI |
Programmed Gas Management Fuel Injection (Honda) |
| PIP |
profile ignition pickup (Ford) |
| PIP |
profile ignition pickup (Ford) |
| PNP |
park/neutral switch |
| PPM |
parts per million |
| PROM |
program read only memory |
| PROM |
program read only memory computer chip |
| PS |
power steering |
| PSA |
Peugeot-Citroën SA |
| PSA |
pressure switch assembly |
| PSI |
pounds per square inch |
| PSP |
power steering pressure |
| pt. |
pint |
| PTOX |
periodic trap oxidizer |
| PVA |
ported vacuum advance |
| PVS |
ported vacuum switch |
| QS9000 |
Quality assurance standard |
| Qt. |
quart |
| RABS |
Rear wheel Antilock Brake System (Ford) |
| RAM |
random access memory |
| RFI |
radio frequency interference |
| RM |
relay module |
| ROM |
read only memory |
| RPM |
revolutions per minute |
| RPO |
regular production option |
| RV |
Recreational Vehicle |
| RWAL |
Rear Wheel Antilock brake system (GM) |
| RWD |
rear-wheel drive |
| SAE |
Society of Automotive Engineers |
| SAP |
accelerator pedal |
| SAVM |
spark advance vacuum modulator |
| SC |
supecharger |
| SCB |
supercharger bypass |
| SCC |
Spark Control Computer (Chrysler) |
| SDI |
Saab Direct Ignition |
| SDM |
sensing diagnostic mode |
| SES |
service engine soon indicator (GM) |
| SFI |
Sequential Fuel Injection (GM) |
| SIR |
Supplemental Inflatable Restraint (air bag) |
| SMPI |
Sequential Multiport Fuel Injection (Chrysler) |
| SOHC |
Single Overhead Camshaft |
| SPOUT |
Spark Output signal (Ford) |
| SRDV |
spark retard delay valve |
| SRI |
service reminder indicator |
| SRS |
Supplemental Restraint System (air bag) |
| SRT |
system readiness test |
| SS |
speed sensor (Honda) |
| SSI |
Solid State Ignition (Ford) |
| ST |
short term fuel trim |
| STFT |
short term fuel trim |
| STS |
Service Technicians Society |
| TA |
temperature air (Honda) |
| TABPV |
throttle air bypass valve (Ford) |
| TAC |
thermostatic air cleaner (GM) |
| TACH |
tachometer |
| TAD |
Thermactor air diverter valve (Ford) |
| TAV |
temperature actuated vacuum |
| TB |
throttle body |
| TBI |
throtle body injection |
| TC |
turbocharger |
| TCC |
torque converter clutch |
| TCC |
torque converter clutch (GM) |
| TCCS |
Toyota Computer Controlled System |
| TCM |
transmission or transaxle control module |
| TCS |
Transmission Controlled Spark (GM) |
| TDC |
top dead center |
| TDI |
Turbodiesel Intercooler |
| TFP |
throttle fluid pressure |
| TIC |
thermal ignition control (Chrysler) |
| TIV |
Thermactor idle vacuum valve (Ford) |
| TKS |
throttle kicker solenoid (Ford) |
| TP |
throttle position |
| TP |
throttle position sensor (Ford) |
| TPI |
Tuned Port Injection (Chevrolet) |
| TPP |
throttle position potentiometer |
| TPS |
throttle position sensor |
| TPT |
throttle position transducer (Chrysler) |
| TRD |
Toyota Racing Development |
| TRS |
Transmission Regulated Spark (Ford) |
| TSP |
throttle solenoid positioner (Ford) |
| TT |
Touring Turismo |
| TV |
throttle valve |
| TVS |
thermal vacuum switch (GM) |
| TVV |
thermal vacuum valve (GM) |
| TWC |
three way caalyst |
| TWC+OC |
three way + oxidation catalytic converter |
| USAA |
United Services Automobile Association |
| V |
volts |
| VAC |
volts alternating current |
| VAF |
vane airflow sensor |
| VAF |
volume airflow |
| VAF |
vane airflow sensor |
| VCC |
viscous converter clutch (GM) |
| VCM |
vehicle control module |
| VDC |
volts direct current |
| VDV |
vacuum delay valve |
| VIN |
vehicle identification number |
| VR |
voltage regulator |
| VS |
vehicle sensor |
| VSS |
vehicle speed sensor |
| VW |
Volkswagen |
| WOT |
wide open throttle switch (GM) |
| WSS |
wheel speed sensor |
| WU-TWC |
warm up three way catalytic converter |
| YMMV |
Your Mileage May Vary |
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