Post by Venturi on Jan 8, 2005 20:55:48 GMT -5
Acronyms in the automotive world can become confusing even for those of us who have been in the trade for many years. So if your OBDII MIL is on because your TPS or MAF is acting up this may help you sort a few things out.
ABS = antilock brake system
AAV = anti-afterburn valve (Mazda)
A/C = air conditioning
AC = air cleaner
ACTS = air charge temperature sensor (Ford)
AERA = Automotive Engine Rebuilders Assn.
A/F = air/fuel ratio
AFM = air flow meter
AFS = air flow sensor (Mitsubishi)
AIR = Air Injection Reaction (GM)
AIR = secondary air injection
AIS = Air Injection System (older Chrysler)
AIS = automatic idle speed motor (Chrysler)
ALCL = assembly line communications link (GM)
ALDL = assembly line data link (GM)
API = American Petroleum Institute
APS = absolute pressure sensor (GM)
APS = atmospheric pressure sensor (Mazda)
ASD = automatic shutdown relay (Chrysler)
ASE = Automotive Service Excellence
A/T = automatic transmission or transaxle
ATC = after top center
ATDC = after top dead center
ATF = automatic transmission fluid
ATS = air temperature sensor (Chrysler)
AWD = all-wheel drive
B+ = battery positive voltage
BARO = barometric pressure sensor (GM)
BCM = body control module (GM)
BHP = brake horsepower
BID = Breakerless Inductive Discharge (AMC)
BMAP = barometric/manifold absolute pressure sensor (older Ford)
BP = backpressure sensor (Ford)
BPS = barometric pressure sensor (Ford & Nissan)
BPT = back-pressure transducer
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)
CAC = charge air cooler
CAFE = corporate average fuel economy
CALPAK = calibration pack
CANP = canister purge solenoid valve (Ford)
CARB = California Air Resources Board
CAS = crank angle sensor
CAS = Clean Air System (older Chrysler)
CC = cubic centimeters
CCOT = clutch cycling orifice tube
CCP = controlled canister purge (GM)
CCV = canister control valve
CDI = Capacitor Discharge Ignition (AMC)
CEC = Crankcase Emission Control System (Honda)
CFC = Chlorofluorocarbons
CFI = continuous fuel injection
cfm = cubic feet per minute
CID = cubic inch displacement
CID = cylinder identification sensor (Ford)
CIS = Continuous Injection System (Bosch)
CL = closed loop
CKP = crankshaft position sensor
CKP REF = crankshaft reference
CMP = camshaft position sensor
CMP REF = camshaft reference
CO = carbon monoxide
CO2 = carbon dioxide
COP = Coil On Plug ignition
CP = crankshaft position sensor (Ford)
CP = canister purge (GM)
CPI = Central Port Injection (GM)
CPP = clutch pedal position
CTOX = continuous trap oxidizer
CTP = closed throttle position
CTS = charge temperature switch (Chrysler)
CTS = coolant temperature sensor (GM)
CVCC = Compound Vortex Controlled Combustion system (Honda)
DEPS = digital engine position sensor
DERM = diagnostic energy reserve module (GM)
DFCO = decel fuel cut-off mode
DFI = direct fuel injection
DIS = Distributorless Ignition System (Ford)
DIS = Direct Ignition System (GM)
DLC = data link connector
DOHC = dual overhead cams
DRBII = Diagnostic Readout Box (Chrysler)
DTC = diagnostic trouble code
DTM = diagnostic test mode
EBCM = electronic brake control module
EBTCM = electronic brake traction control module
EC = engine control
ECA = electronic control assembly
ECCS = Electronic Concentrated Control System (Nissan)
ECM = engine control module
ECL = engine coolant level
ECT = engine coolant temperature
ECU = electronic control unit (Ford, Honda & Toyota)
EDIS = Electronic Distributorless Ignition System (Ford)
EEC = Electronic Engine Control (Ford)
EECS = Evaporative Emissions Control system (GM)
EEPROM = electrically erasable programmable read only memory
EPROM = erasable programmable read only memory chip
EFE = Early Fuel Evaporation system
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
ELB Electronic Lean Burn (older Chrysler)
EPROM = erasable programmable read only memory
ESA = Electronic Spark Advance (Chrysler)
ESC = Electronic Spark Control (GM)
EST = Electronic Spark Timing (GM)
EVAP = evaporative emission system
EVP = EGR valve position sensor (Ford)
EVRV = electronic vacuum regulator valve for EGR (GM)
FEEPROM = flash electrically erasable programmable read only memory
FF = flexible fuel
FI = fuel injection
FLS = fluid level sensor (GM)
FP = fuel pump
FPROM = flash erasable programmable read only memory
FT = fuel trim
ft.lb. = foot pound
FWD = front-wheel drive
GCM = governor control module
GEN = generator
GND = ground
HC = hydrocarbon
HEGO = heated exhaust gas oxygen sensor
HEI = High Energy Ignition (GM)
HO2S = heated oxygen sensor
HO2S1 = upstream heated oxygen sensor
HO2S2 = up or downstream heated oxygen sensor
HO2S3 = downstream heated oxygen sensor
HVS = high voltage switch
HVAC = heating ventilation and air conditioning system
IA = intake air
IAC = idle air control
IAT = intake air temperature
IATS = intake air temperature sensor
IC = ignition control circuit
ICM = ignition control module
IFI = indirect fuel injection
IFS = inertia fuel shutoff
IGN = ignition
I/M = inspection/maintenance
IM240 = inspection/maintenance 240 program
I/P = instrument panel
IPC = instrument panel cluster
ISC = idle speed control
ISO = International Standards Organization
ITS = idle tracking switch (Ford)
KOEC = key on, engine cranking
KOEO = key on, engine off
KOER = key on, engine running
KS = knock sensor
KSM = knock sensor module
KV = kilovolts
LT = long term fuel trim
MAF = mass airflow sensor
MAP = manifold absolute pressure sensor
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
MFI = multiport fuel injection
MIL = malfunction indicator lamp
MPFI = multi point fuel injection
MPH = miles per hour
MPI = multi port injection
mV = millivolts
NVRAM = nonvolatile random access memory
NOX = oxides of nitrogen
O2S = oxygen sensor
OBD = onboard diagnostics
OBD I = onboard diagnostics generation one
OBD II = onboard diagnostics, second generation
OC = oxidation catalyst
ODM = output device monitor
OE = original equipment
OEM = original equipment manufacturer
OHC = overhead cam
OL = open loop
ORC = oxidation reduction catalyst
OSC = oxygen sensor storage
PAIR = pulsed secondary air injection
PCM = powertrain control module
PCV = positive crankcase ventilation
PFI = port fuel injection (GM)
PGM-FI = Programmed Gas Management Fuel Injection (Honda)
PIP = profile ignition pickup (Ford)
PNP = park/neutral switch
PROM = program read only memory
PSA = pressure switch assembly
PSP = power steering pressure
PTOX = periodic trap oxidizer
PVS = ported vacuum switch
RABS = Rear wheel Antilock Brake System (Ford)
RAM = random access memory
RM = relay module
ROM = read only memory
RPM = revolutions per minute
RPO = regular production option
RWAL = Rear Wheel Antilock brake system (GM)
RWD = rear-wheel drive
SAE = Society of Automotive Engineers
SC = supercharger
SCB = supercharger bypass
SCC = Spark Control Computer (Chrysler)
SDM = sensing diagnostic mode
SES = service engine soon indicator (GM)
SFI = sequential fuel injection
SIR = Supplemental Inflatable Restraint (air bag)
SMPI = Sequential Multiport Fuel Injection (Chrysler)
SOHC = single overhead cam
SPOUT = Spark Output signal (Ford)
SRI = service reminder indicator
SRS = Supplemental Restraint System (air bag)
SRT = system readiness test
SS = speed sensor (Honda)
ST = short term fuel trim
TAC = thermostatic air cleaner (GM)
TAD = Thermactor air diverter valve (Ford)
TB = throttle body
TBI = throttle body injection
TC = turbocharger
TCC = torque converter clutch
TCCS = Toyota Computer Controlled System
TCM = transmission or transaxle control module
TCS = Transmission Controlled Spark (GM)
TDC = top dead center
TFP = throttle fluid pressure
TP = throttle position
TPI = Tuned Port Injection (Chevrolet)
TPS = throttle position sensor
TPT = throttle position transducer (Chrysler)
TV = throttle valve
TVS = thermal vacuum switch
TVV = thermal vacuum valve
TWC = three way catalyst
TWC+OC = three way + oxidation catalytic converter
V = volts
VAF = volume airflow
VCC = viscous converter clutch (GM)
VCM = vehicle control module
VDV = vacuum delay valve
VIN = vehicle identification number
VR = voltage regulator
VS = vehicle sensor
VSS = vehicle speed sensor
WOT = wide open throttle
WSS = wheel speed sensor
WU-TWC = warm up three way catalytic converter
ABS = antilock brake system
AAV = anti-afterburn valve (Mazda)
A/C = air conditioning
AC = air cleaner
ACTS = air charge temperature sensor (Ford)
AERA = Automotive Engine Rebuilders Assn.
A/F = air/fuel ratio
AFM = air flow meter
AFS = air flow sensor (Mitsubishi)
AIR = Air Injection Reaction (GM)
AIR = secondary air injection
AIS = Air Injection System (older Chrysler)
AIS = automatic idle speed motor (Chrysler)
ALCL = assembly line communications link (GM)
ALDL = assembly line data link (GM)
API = American Petroleum Institute
APS = absolute pressure sensor (GM)
APS = atmospheric pressure sensor (Mazda)
ASD = automatic shutdown relay (Chrysler)
ASE = Automotive Service Excellence
A/T = automatic transmission or transaxle
ATC = after top center
ATDC = after top dead center
ATF = automatic transmission fluid
ATS = air temperature sensor (Chrysler)
AWD = all-wheel drive
B+ = battery positive voltage
BARO = barometric pressure sensor (GM)
BCM = body control module (GM)
BHP = brake horsepower
BID = Breakerless Inductive Discharge (AMC)
BMAP = barometric/manifold absolute pressure sensor (older Ford)
BP = backpressure sensor (Ford)
BPS = barometric pressure sensor (Ford & Nissan)
BPT = back-pressure transducer
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)
CAC = charge air cooler
CAFE = corporate average fuel economy
CALPAK = calibration pack
CANP = canister purge solenoid valve (Ford)
CARB = California Air Resources Board
CAS = crank angle sensor
CAS = Clean Air System (older Chrysler)
CC = cubic centimeters
CCOT = clutch cycling orifice tube
CCP = controlled canister purge (GM)
CCV = canister control valve
CDI = Capacitor Discharge Ignition (AMC)
CEC = Crankcase Emission Control System (Honda)
CFC = Chlorofluorocarbons
CFI = continuous fuel injection
cfm = cubic feet per minute
CID = cubic inch displacement
CID = cylinder identification sensor (Ford)
CIS = Continuous Injection System (Bosch)
CL = closed loop
CKP = crankshaft position sensor
CKP REF = crankshaft reference
CMP = camshaft position sensor
CMP REF = camshaft reference
CO = carbon monoxide
CO2 = carbon dioxide
COP = Coil On Plug ignition
CP = crankshaft position sensor (Ford)
CP = canister purge (GM)
CPI = Central Port Injection (GM)
CPP = clutch pedal position
CTOX = continuous trap oxidizer
CTP = closed throttle position
CTS = charge temperature switch (Chrysler)
CTS = coolant temperature sensor (GM)
CVCC = Compound Vortex Controlled Combustion system (Honda)
DEPS = digital engine position sensor
DERM = diagnostic energy reserve module (GM)
DFCO = decel fuel cut-off mode
DFI = direct fuel injection
DIS = Distributorless Ignition System (Ford)
DIS = Direct Ignition System (GM)
DLC = data link connector
DOHC = dual overhead cams
DRBII = Diagnostic Readout Box (Chrysler)
DTC = diagnostic trouble code
DTM = diagnostic test mode
EBCM = electronic brake control module
EBTCM = electronic brake traction control module
EC = engine control
ECA = electronic control assembly
ECCS = Electronic Concentrated Control System (Nissan)
ECM = engine control module
ECL = engine coolant level
ECT = engine coolant temperature
ECU = electronic control unit (Ford, Honda & Toyota)
EDIS = Electronic Distributorless Ignition System (Ford)
EEC = Electronic Engine Control (Ford)
EECS = Evaporative Emissions Control system (GM)
EEPROM = electrically erasable programmable read only memory
EPROM = erasable programmable read only memory chip
EFE = Early Fuel Evaporation system
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
ELB Electronic Lean Burn (older Chrysler)
EPROM = erasable programmable read only memory
ESA = Electronic Spark Advance (Chrysler)
ESC = Electronic Spark Control (GM)
EST = Electronic Spark Timing (GM)
EVAP = evaporative emission system
EVP = EGR valve position sensor (Ford)
EVRV = electronic vacuum regulator valve for EGR (GM)
FEEPROM = flash electrically erasable programmable read only memory
FF = flexible fuel
FI = fuel injection
FLS = fluid level sensor (GM)
FP = fuel pump
FPROM = flash erasable programmable read only memory
FT = fuel trim
ft.lb. = foot pound
FWD = front-wheel drive
GCM = governor control module
GEN = generator
GND = ground
HC = hydrocarbon
HEGO = heated exhaust gas oxygen sensor
HEI = High Energy Ignition (GM)
HO2S = heated oxygen sensor
HO2S1 = upstream heated oxygen sensor
HO2S2 = up or downstream heated oxygen sensor
HO2S3 = downstream heated oxygen sensor
HVS = high voltage switch
HVAC = heating ventilation and air conditioning system
IA = intake air
IAC = idle air control
IAT = intake air temperature
IATS = intake air temperature sensor
IC = ignition control circuit
ICM = ignition control module
IFI = indirect fuel injection
IFS = inertia fuel shutoff
IGN = ignition
I/M = inspection/maintenance
IM240 = inspection/maintenance 240 program
I/P = instrument panel
IPC = instrument panel cluster
ISC = idle speed control
ISO = International Standards Organization
ITS = idle tracking switch (Ford)
KOEC = key on, engine cranking
KOEO = key on, engine off
KOER = key on, engine running
KS = knock sensor
KSM = knock sensor module
KV = kilovolts
LT = long term fuel trim
MAF = mass airflow sensor
MAP = manifold absolute pressure sensor
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
MFI = multiport fuel injection
MIL = malfunction indicator lamp
MPFI = multi point fuel injection
MPH = miles per hour
MPI = multi port injection
mV = millivolts
NVRAM = nonvolatile random access memory
NOX = oxides of nitrogen
O2S = oxygen sensor
OBD = onboard diagnostics
OBD I = onboard diagnostics generation one
OBD II = onboard diagnostics, second generation
OC = oxidation catalyst
ODM = output device monitor
OE = original equipment
OEM = original equipment manufacturer
OHC = overhead cam
OL = open loop
ORC = oxidation reduction catalyst
OSC = oxygen sensor storage
PAIR = pulsed secondary air injection
PCM = powertrain control module
PCV = positive crankcase ventilation
PFI = port fuel injection (GM)
PGM-FI = Programmed Gas Management Fuel Injection (Honda)
PIP = profile ignition pickup (Ford)
PNP = park/neutral switch
PROM = program read only memory
PSA = pressure switch assembly
PSP = power steering pressure
PTOX = periodic trap oxidizer
PVS = ported vacuum switch
RABS = Rear wheel Antilock Brake System (Ford)
RAM = random access memory
RM = relay module
ROM = read only memory
RPM = revolutions per minute
RPO = regular production option
RWAL = Rear Wheel Antilock brake system (GM)
RWD = rear-wheel drive
SAE = Society of Automotive Engineers
SC = supercharger
SCB = supercharger bypass
SCC = Spark Control Computer (Chrysler)
SDM = sensing diagnostic mode
SES = service engine soon indicator (GM)
SFI = sequential fuel injection
SIR = Supplemental Inflatable Restraint (air bag)
SMPI = Sequential Multiport Fuel Injection (Chrysler)
SOHC = single overhead cam
SPOUT = Spark Output signal (Ford)
SRI = service reminder indicator
SRS = Supplemental Restraint System (air bag)
SRT = system readiness test
SS = speed sensor (Honda)
ST = short term fuel trim
TAC = thermostatic air cleaner (GM)
TAD = Thermactor air diverter valve (Ford)
TB = throttle body
TBI = throttle body injection
TC = turbocharger
TCC = torque converter clutch
TCCS = Toyota Computer Controlled System
TCM = transmission or transaxle control module
TCS = Transmission Controlled Spark (GM)
TDC = top dead center
TFP = throttle fluid pressure
TP = throttle position
TPI = Tuned Port Injection (Chevrolet)
TPS = throttle position sensor
TPT = throttle position transducer (Chrysler)
TV = throttle valve
TVS = thermal vacuum switch
TVV = thermal vacuum valve
TWC = three way catalyst
TWC+OC = three way + oxidation catalytic converter
V = volts
VAF = volume airflow
VCC = viscous converter clutch (GM)
VCM = vehicle control module
VDV = vacuum delay valve
VIN = vehicle identification number
VR = voltage regulator
VS = vehicle sensor
VSS = vehicle speed sensor
WOT = wide open throttle
WSS = wheel speed sensor
WU-TWC = warm up three way catalytic converter
