Glossary of Automotive Acronyms

A – Amperes

A/C – Air Conditioning

A/CL BIMET – Air Cleaner Bi-Metal Sensor

A/CL DV – Air Cleaner Duct and Valve Vacuum Motor

A/D – Analog to Digital Converter

A/F – Air Fuel Ratio

A/T – Automatic Transmission

A4R70W – Automatic Overdrive Electronic Wide Ration Transmission

AAC – Auxiliary Air Control Valve

AAT – Ambient Air Temperature

AAV – Anti-Afterburn Valve (Mazda)

ABCV – Airbleed Control Valve (Ford)

ABS – Antilock Brake System

ABSV – Air Bypass Solenoid Valve (Mazda)

ABV – Air Bypass Valve

AC – Alternating Current

ACC – Automatic Climate Control

ACC – Air Conditioning Clutch

ACCS – A/C Cycling Clutch Switch

ACD – Air Conditioning Demand Switch

ACON – Air Conditioning On Signal

ACP – Air Conditioning Pressure Signal

ACPSW – Air Conditioning Pressure Switch

ACR – Air Conditioning Relay

ACR4 – Air Conditioning Refrigerant, Recovery, Recycling, Recharging

ACT – Air Charge Temperature

ACV – Air Control Valve

ADU – Analog-Digital Unit

AFC – Air Flow Control

AFM – Air Flow Meter

AFR – Air Fuel Ratio

AFS – Air Flow Sensor (Mitsubishi)

AIR – Secondary Air Injection System

AIRB – Air Bypass Solenoid

AIRD – AIR Diverter Solenoid

AIS – Air Injection System (Chrysler)

AIS – Automatic Idle Speed

AIV – Air Injection Valve

ALC – Automatic Level Control

ALCL – Assembly Line Communications Link (GM)

ALDL – Assembly Line Data Link

ALT – Alternator (replaced with GEN)

AM1 – Air Management 1, AIR Bypass

AM2 – Air Management 2, AIR Diverter

AMB – Ambient

AOD – Automatic Overdrive

AODE – Automatic Overdrive Electronic Transmission

AODE-W – Automatic Overdrive Electronic Wide (ratio transmission)

AP – Accelerator Pedal

APC – Automatic Performance Control

APCM – Auxiliary Powertrain Control Module

API – Application Programming Interface

APS – Absolute Pressure Sensor (GM)

APS – Atmospheric Pressure Sensor (Mazda)

APT – Adjustable part Throttle

ARC – Automatic Ride Control

ARS – Automatic Restraint System

ASARC – Air Suspension Automatic Ride Control

ASCII – American Standard for Character Information Interchange

ASD – Automatic Shutdown Relay

ASDM – Airbag System Diagnostic Module (Chrysler)

ASE – Automotive Service Excellence

ASM – Acceleration Simulation Mode

ASR – Acceleration Slip Regulation

ATC – Automatic Temperature Control

ATDC – After Top Dead Center

ATF – Automatic Transmission Fluid

ATM – Actuator Test Mode

ATP – Automotive Telemetry Protocol

ATS – Air Temperature Sensor (Chrysler)

ATX – Automatic Transaxle

AVOM – Analog Volt / Ohm Meter

AWD – All Wheel Drive

AWG – American Wire Gage’

AX4S – Automatic 4-Speed Trans.

AXOD – Automatic Overdrive Transaxle

AXOD-E – Automatic Overdrive Transaxle – Electronically Controlled

B/MAP – Barometric/Manifold Absolute Pressure

B+ – Battery Positive Voltage

BAC – Bypass Air Control Valve

BARO – Barometric Pressure

BAT – Battery

BC – Blower Control

BCM – Body Control Module

BEV – Barrier Equivalent Velocity (crash testing)

BHP – Brake Horsepower

BHS – Bimetal Heat Sensor (Ford)

BID – Breakerless Inductive Discharge (AMC)

BLM – Block Learn Multiplier (replaced with LT FUEL TRIM)

BMAP – Barometric/Manifold Absolute Pressure Sensor (Ford)

BOB – Breakout Box

BOO – Brake On / Off Switch

BP – Barometric Pressure

BPA – Mechanical Bypass Air

BPCSV – Bypass Control Solenoid Valve

BPP – Brake Pedal Position Switch

BPS – Back Pressure Sensor

BPT – Back-Pressure Transducer

BPV – Bypass Valve (Ford)

BPW – Brake Pulse Width

BSV – Backfire Suppressor (Ford)

BTDC – Before Top Dead Center

BTS – Battery Temperature Sensor

BTSI – Brake Transmission Shift Interlock

Btu – British Thermal Unit

BUS N – Bus Negative

BUS P – Bus Positive

BV – Bowl Vent Port (Ford)

BVSV – Bi-Metal Vent Control Valve

BVT – Backpressure Variable Transducer System (Ford)

C – Carbon

C – Celsius

C.A.R.B. – California Air Resource Board

C3 – Computer Command Control System (GM)

C3I – Computer Controlled Coil Ignition

C4 – Computer Controlled Catalytic Converter System (GM)

CAC – Charge Air Cooler

CAI – Controlled Auto Ignition

CAN – Controller Area Network

CANP – EVAP Canister Purge Solenoid

CARB – Carburetor

CAS – Crank Angle Sensor

CAS – Clean Air System

CAS – Creep Aid System (automatic transmissions)

CASE – Cranking Angle Sensing Error

CBD – Closed Bowl Distributor

CC – Catalytic Converter

CC – Climate Control

CC – Cruise Control

CC – Cubic Centimeters

CCC – Computer Command Control System (GM)

CCC – Converter Clutch Control

CCD – Computer Controlled Dwell

CCD – Chrysler Collision Detection

CCDIC – Climate Control Driver Information Center

CCEI – Coolant Controlled Idle Enrichment (Chrysler)

CCEV – Coolant Controlled Engine Vacuum Switch (Chrysler)

CCM – Continuous Component Monitor

CCM – Central Control Module

CCM – Comprehensive Component Monitor

CCNT, DTC CCNT – Count Code

CCO – Converter Clutch Override

CCOT – Cycling Clutch Orifice Tube

CCP – Controlled Canister Purge (GM)

CCP – Climate Control Panel

CCRM – Constant Control Relay Module

CCS – Coast Clutch Solenoid

CCSP – Carbon Canister Storage/Purge

CCV – Canister Control Valve

CDCV – Canister Drain Cut Valve

CDI – Capacitor Discharge Ignition (AMC)

CDR – Chrysler Diagnostic Readout

CDRV – Crankcase Depression Regulator Valve

CE – Commutator End

CEAB – Cold Engine Air Bleed

CEC – Crankcase Emission Control System (Honda)

CECU – Central Electronic Control Unit (Nissan)

CEL – Check Engine Light

CER – Cold Enrichment Rod (Ford)

CES – Clutch Engage Switch

CESS – Cold Engine Sensor Switch

CFC – Chlorofluorocarbons

CFI – Central Fuel Injection

CFI – Continuous Fuel Injection

CFM – Cubic Feet Per Minute

CFV – Critical Flow Venturi

CHM – Cold Mixture Heater

CID – Cylinder Identification Signal

CID – Cubic Inch Displacement

CIS – Continuous Injection System (Bosch)

CKP – Crankshaft Position Sensor

CKP REF – Crankshaft Position Reference

CKT – Circuit

CL – Closed Loop

CLC – Converter Lockup Clutch (replaced with TCC)

CLCC – Closed Loop Carburetor Control

CLNT – Coolant

CLV – Calculated Load Value

CMFI – Central Multi-port Fuel Injection

CMP – Camshaft Position Sensor

CMP REF – Camshaft Position Reference

CO – Carbon Monoxide

CO2 – Carbon Dioxide

COC – Conventional Oxidation Catalyst (Ford)

COLPAS – Column-Integrated Power-Assisted Steering

COP – Coil On Plug Electronic Ignition

CP – Crankshaft Position Sensor (Ford)

CP – Canister Purge (GM)

CPA – Connector Position Assurance

CPI – Central Port Fuel Injection

CPP – Clutch Pedal Position

CPS – Central Power Supply

CPSOV – Canister Purge Shut Off Valve (Ford)

CPU – Central Processing Unit

CRC – Cyclic Redundancy Check

CRK – Cranking Signal

CRS – Common Rail System

CRT – Cathode Ray Tube

CSC – Coolant Spark Control (Ford)

CSE GND – PCM Case Ground

CSF – Crankshaft Speed Fluctuation Sensor

CSSA – Cold Start Spark Advance System (Ford)

CSSH – Cold Start Spark Hold System (Ford)

CTAV – Cold Temperature Actuated Vacuum Switch (Ford)

CTM – Central Timer Module

CTO – Clean Tachometer Output

CTO – Coolant Temperature Override

CTOX – Continuous Trap Oxidizer

CTP – Closed Throttle Position

CTS – Charge Temperature Switch (Chrysler)

CTS – Coolant Temperature Sensor

CTVS – Closed Throttle Vacuum Switch

CV – Control Valve

CV – Constant Velocity

CVCC – Compound Vortex Controlled Combustion System (Honda)

CVD – Cylinder Valve Deactivation

CVR – Control Vacuum Regulator (Ford)

CVS – Constant Volume Sampler

CVTC – Continuous Valve Timing Control

CVTS – Continuous Variable Tumble System (engine combustion)

CWM-Ford – Cold Weather Modulator (Ford)

DAB – Delayed Accessory Bus

dB – Decibels

DC – Duty Cycle

DC – Direct Current

DCISCA – DC Motor Idle Speed Actuator

DCL – Data Communication Link

DDD – Dynamic Data Display

DDL – Diagnostic Data Link

DDL – Diagnostic Information Base

DE – Drive End

DEC – Digital Electronic Controller

DEFI – Digital Electronic Fuel Injection (Cadillac)

DEPS – Digital Engine Position Sensor

DERM – Diagnostic Energy Reserve Module

DFCO – Decel Fuel Cutoff Mode

DFI – Direct Fuel Injection

DFS – Decel Fuel Shutoff

DI – Distributor Ignition (System)

DI – Direct Ignition

DIB – Diagnostic Information Base

DIC – Driver Information Center

DICM – Distributor Ignition Control Module

DIS – Direct Ignition (Waste Spark)

DITDES – Desired Dynamic Injection Timing

DLC – Data Link Connector (OBD)

DLL – Dynamic Link Library

DM – Drive Motor

DMCM – Drive Motor Control Module

DMCT – Drive Motor Coolant Temperature

DMPI Module – Drive Motor Power Inverter Module

DMS – Distributor Modulator System

DOHC – Dual Overhead Cam

DOL – Data Output Line to IPC

DPC – Dynamic Pressure Control

DPFE – Differential Pressure Feedback

DPI – Fuel Plug Inhibit

DRB II – Diagnostic Readout Box (Chrysler)

DRCV – Distributor Retard Control Valve

DREAMS – Digital Room Enlargement Automotive Sound

DRFS – Demand-Regulated Fuel Supply

DRL – Daytime Running Lights

DSBP – Driver Seat Belt Pretensioner

DSO – Digital Storage Oscilloscope

DSR – Ford Diagnostic Subroutine

DSS – Downshift Solenoid

DSSA – Dual Signal Spark Advance (Ford)

DSV – Deceleration Solenoid Valve

DTC – Diagnostic Trouble Code

DTC FRZ – Diagnostic Trouble Code Freeze Frame

DTM – Diagnostic Test Mode

DTVS – Dual Temperature Vacuum Switch

DV – Delay Valve

DVAC – Distributor Vacuum Advance Control Valve

DVDSV – Differential Vacuum Delay and Separator Valve

DVDV – Distributor Vacuum Delay Valve

DVOM – Digital Volt-Ohmmeter

DV-TW – Relay Valve Two Way

DVVV – Distributor Vacuum Vent Valve

E4OD – Electronic 4-Speed Overdrive

EAC – Electronic Air Control (replaced with AIR)

EACV – Electronic Air Control Valve

EAIR – Electronic Secondary Air Injection

EBCM – Electronic Brake Control Module

EBP – Exhaust Back :Pressure

EBTCM – Electronic Brake T/C Module

EC – Engine Control

ECA – Electronic Control Assembly (Ford)

ECC – Electronic Climate Control

ECCS – Electronic Concentrated Control System

ECI – Extended Compressor at Idle

ECIT – Electronic Control Ignition Timing

ECL – Engine Coolant Level

ECM – Engine/Electronic Control Module

ECO – Electronically Controlled Orifice (power steering)

ECS – Evaporation Control System (Chrysler)

ECS – Emission Control System

ECT – Engine Coolant Temperature

ECU – Electronic Control Unit

ECU – Electronic Control Unit

EDF – Electro-Drive Fan

EDIS – Electronic Direct Ignition System (replaced with EI)

EDM – Electronic Distributor Modulator (Ford)

EEC – Electronic Engine Control (Ford)

EEC-I – Control of Ignition Timing

EEC-II – Control of Ignition Timing and Fuel Delivery Through a Feed Carburetor System

EEC-III – Control of Ignition Timing and Fuel Delivery Through a Central Fuel Injection System

EEC-IV – Control of Ignition Timing and Fuel Delivery Through an Electronic Fuel Injection System

EECS – Evaporative Emission Control System

EEGR – Electronic EGR (Solenoid)

EEGR Monitor – Electronic EGR Test

EEPROM – Electronically Erasable Programmable Read Only Memory

EESS – Evaporative Emission Shed System (Ford)

EEVIR – Evaporator Equalized Values in Receiver

EFC – Electronic Feedback Carburetor (Chrysler)

EFC – Electronic Fuel Control

EFCA – Electronic Fuel Control Assembly (Ford)

EFE – Early Fuel Evaporation

EFI – Electronic Fuel Injection

EFT – Engine Fuel Temperature

EFV – Early Fuel Evaporation

EGC – Exhaust Gas Check Valve (Ford)

EGO – Exhaust Gas Oxygen Sensor (Ford)

EGOR – EGO Signal Return (Ford)

EGR – Exhaust Gas Recirculation

EGR Monitor – OBDII EGR Test

EGR TVV – Exhaust Gas Recirculation Thermal Vacuum Valve

EGRB – EGR Boost Sensor

EGRC – EGR Control Solenoid (Ford)

EGRC-BPT – EGR Control Back Pressure Transducer

EGRPS – EGR Valve Position Sensor (Mazda)

EGRT – Exhaust Gas Recirculation Temperature

EGRV – Exhaust Gas Recirculation Vent Solenoid

EGTS – Exhaust Gas Temperature Switch (replaced with EGRT)

EH – Electro-Hydraulic

EI – Integrated Electronic Ignition System

EICV – Electronic Idle Control Valve

ELB – Electronic Lean Burn (Chrysler)

ELC – Electronic Level Control

ELCD – Evaporative Loss Control Device

EM – Engine Modification

EMB – Electromagnetic Brakes

EMF – Electromotive Force (voltage)

EMI – Electromagnetic Interference

EMR – Electronic Module Retard

EMVT – Electro-Mechanical Valve Train

EN – Generator (Alternator)

EOBD – European On Board Diagnostics

EOP – Engine Oil Pressure

EOS – Exhaust Oxygen Sensor

EOT – Engine Oil Temperature

EP – Exhaust Pressure

EPA – Environmental Protection Agency

EPC – Electronic Pressure Control

EPOS – EGR Valve Position Sensor (Ford)

EPR – Exhaust Pressure Regulator Valve

EPROM – Erasable Programmable Read Only Memory

EPT – EGR Pressure Transducer (replaced with PFE)

ESA – Electronic Spark Advance (Chrysler)

ESC – Electronic Spark Control System (Ford)

ESD – Electrostatic Discharge

ESS – Electronic Spark Selection (Cadillac)

ESS – Engine Start-Stop

EST – Electronic Spark Timing

ETC – Electronic Temperature Control

ETP – EGR Pressure Transducer

ETR – Electronically Tuned Receiver

EVAP – Evaporative Emissions System

EVAP CP – Evaporative Canister Purge

EVAP CV – Evaporative Emissions System Canister Vent

EVIC – Electronic Vehicle Information Center

EVO – Electronic Vehicle Orifice

EVP – EGR Valve Position Sensor

EVR – EGR Vacuum Regulator

EXH – Exhaust

EZEE – Equal to Zero Emissions Engine

F4WD – Full Time Four Wheel Drive

FAN – Cooling Fan (Low or High Speed)

FBC – Feedback Carburetor

FBCA – Feedback Carburetor Actuator (Ford)

FC – Fan Control

FCA – Fuel Control Assembly (Chrysler)

FCM – Fan Control Module

FCS – Fuel Control Solenoid (Ford)

FDBK – Feedback

FDC – Fuel Deceleration Valve (Ford)

FDV – Fuel Decel Valve (Ford)

FEEPROM – Flash Electronically Erasable Programmable Read Only Memory

FEPROM – Flash Erasable Programmable Read Only Memory

FF – Flexible Fuel

FFFP – Fuel-Flexible Fuel Processor

FI – Fuel Injector

FIC – Fast Idle Control

FICD – Fast Idle Control Device

FIPL – Fuel Injection Pump Lever

FLC – Fluid Lock-up Converter (Ford)

FLS – Fluid Level Sensor (GM)

FM – Fan Motor Program in PCM

FMEM – Failure Mode Effect Management

FMVSS – Federal Motor Vehicle Safety Standards

FOM – Fix Operating Mode (Limp Mode)

FP – Fuel Pump Relay (Ford)

FP – Fuel Pump

FPM – Fuel Pump Monitor (in PCM)

FPRC – Fuel Pump Regulator Control

FRC – Forced

FRP – Fuel Rail Pressure

FRT – Fuel Rail Temperature

FRZ – Freeze Frame

FT – Fuel Trim

FTL – Fuel Tank Level Sensor

FTO – Filtered Tachometer Output

FTP – Fuel Tank Pressure

FTT – Fuel Tank Temperature

FWD – Front Wheel Drive

g/sec – Grams per Second

GA – Gage

GCM – Governor Control Module

GCW – Gross Combination Weight

GDC – Fuel Data Center

GDI – Gasoline Direct Injection

GEM – Generic Electronic Module

GEN – Generator (Alternator)

GND – Electrical Ground Connection

GOOSE – Brief Throttle Open/Close

GPM – Grams Per Mile

GPS – Governor Pressure Sensor

GST – Generic Scan Tool

GVW – Gross Vehicle Weight

H – Hydrogen

H/CMPR – High Compression

H2O – Water

HAC – High Altitude Compensator

HAIS – Heated Air Intake System (Chrysler)

HBV – Heater Blower Voltage

HC – Hydrocarbons

HCDS – High Clutch Drum Speed

HCV – Hydrocarbon (Ford)

HCV – Exhaust Heat Control Valve (Ford)

HD – Heavy Duty

HDC – Heavy Duty Cooling

HDR-CKP – High Data Rate CKP Sensor

HEGO – Heated Exhaust Gas Oxygen Sensor

HEI – High Energy Ignition (GM)

HFC – High (speed) Fan Control

HFP – High Fuel Pump (Relay) Control

Hg – Mercury

HIC – Hot-Idle Compensator (Ford)

HLOS – Hardware Limited Operation System

HO – High Output

HO2S – Heated Oxygen Sensor

HO2S-1-1 – Bank One Sensor One Signal

HO2S-1-2 – Bank One Sensor Two Signal

HO2S-1-3 – Bank One Sensor Three Signal

HO2S-2-1 – Bank Two Sensor One Signal

HO2S-2-2 – Bank Two Sensor Two Signal

hp – Horsepower

HPC – High Pressure Cutoff

HPL – High Pressure Liquid

HPS – High Performance System

HPV – High Pressure Vapor

HSC – High Swirl Combustion

HSV – Hill Start Valve (mechanical clutch)

HT – High Tension

HUB – Hub Unit Bearing

HUD – Heads Up Display

HVAC – Heater Ventilation and Air Conditioning

HVACM – Heater-Vent-Air Conditioning Module

HVS – High Voltage Switch

Hz – Hertz

I/M – Inspection and Maintenance

I/O – Input / Output

I/P – Instrument Panel

IA – Intake Air

IAC – Idle Air Control (motor or solenoid)

IACV – Idle Air Control Valve

IAS – Inlet Air Solenoid (Ford)

IAT – Intake Air Temperature

IBP – Integral Back Pressure

IBS – Intelligent Brake System

IC – Integrated Circuit

IC – Ignition Control

ICM – Ignition Control Module

ICP – Injection Control Pressure

ICS – Idle Control Solenoid (GM)

ID – Inside Diameter

IDI – Integrated Direct Ignition

IDL – Idle Position Switch

IDM – Injector Driver Module

IDM – Ignition Diagnostic Monitor

IFI – Indirect Fuel Injection

IFR – In-Frame Response

IFS – Inertia Fuel Switch

IGN – Ignition

IGN ADV – Ignition Advance

IGN GND – Ignition Ground

ILC – Idle Load Compensator

IMA – Idle Mixture Adjuster

IMRC – Intake Manifold Runner Control

IMS – Ignition Module Signal

IMS – Inferred Mileage Sensor (Ford)

IMT – Intake Manifold Timing

INJ 1 to INJ 10 – Fuel Injectors 1 to 10

INT – Integrator (replaced with ST FUEL TRIM)

IOCTL – Input / Output Control

IPC – Instrument Panel Cluster

IPR – Injector Pressure Regulator

IRCM – Integrated Relay Control Module

ISA – Idle Speed Actuator

ISC – Idle Speed Control

ISO – International Standard of Organization

ISS – Input Shaft Speed

ISS – Instant Start System (diesel engine)

ITA – Ignition Timing Adjustment

ITCS – Ignition Timing Control System (Honda)

ITS – Idle Tracking Switch

IVPWR – EEC-Measured Battery Voltage

IVS – Idle Validation Switch

IVSC – Integrated Vehicle Speed Control

IVV – Idle Vacuum Valve (Ford)

JAS – Jet Air System (Mitsubishi)

JSV – Jet Mixture Solenoid Valve

KAM – Keep Alive Memory

KAPWR – Direct Battery Power

KD – Kickdown

KDLH – Kickdown Low Hold

Kg/cm2 – Kilograms/ Cubic Centimeters

kHz – Kilohertz

Km – Kilometers

KOEC – Key On, Engine Cranking

KOEO – Key On, Engine Off

KOER – Key On, Engine Running

KPA – Kilopascal

KS – Knock Sensor

KSM – Knock Sensor Module

KWP – Keyword Protocol

L – Liters

L4 – Four Cylinder Inline Engine

LAMBSE – Short Term Fuel Trim

LCD – Liquid Crystal Display

LDP – Leak Detection Pump

LDVSP – Light-Duty Vehicle Surveillance Program

LED – Light Emitting Diode

LFC – Low Fan Control

LFP – Low Speed Fuel Pump Control

LHD – Left Hand Drive

LOAD – Calculated Load Value

LOC – Light Off Catalyst

LONGFT – Long Term Fuel Trim

LOOP – Engine Operating Loop Status

LOS – Limited Operating Strategy

LPG – Liquid Petroleum Gas

LSS – Linear Shift Solenoid

LTFT – Long Term Fuel Trim

LTFT – Long-Term Fuel Trim

LTS – Low Coolant Switch

LUS – Lock-Up Solenoid

LV8 – Load Variable

LWB – Long Wheel Base

M/C – Mixture Control

M/T – Manual Transmission

MAF – Mass Air Flow Sensor

MAF RTN – Mass Airflow Sensor Ground

MAP – Manifold Absolute Pressure Sensor

MAS – Mixture Adjust Screw

MAT – Manifold Air Temperature

MC – Mixture Control

MCS – Mixture Control Solenoid (GM)

MCT – Manifold Charge Temperature Sensor (Ford)

MCU – Microprocessor Control Unit (Ford)

MCV – Manifold Control Valve (Ford)

MDB – Moving Deformable Barrier (crash testing)

MDP – Manifold Differential Pressure

MECS – Mazda Electronic Control System

MEMCAL – Memory Calibration

MFDES – Desired Mass of Fuel as Determined by the EEC Strategy

MFI – Multiport Fuel Injection

MGP – Manifold Gauge Pressure = MAP – BP

MIC – Mechanical Instrument Cluster

MICE – Multimedia Information Communications and Entertainment

MIL – Malfunction Indicator Lamp

MISAR – Microprocessed Sensing and Automatic Regulation (GM)

MLP – Manual Lever Position

MLP – Manual Lever Position (sensor)

MLS – Multi-Layer Steel

MLUS – Modulated Lock Up Solenoid or its Control Circuit (Ford)

MLVLPS – Manual Valve Lever Position

MODE – Engine Operation Mode, 0 = No Start, 1 = Crank, 2 = Run

MPFI – Multi-Port Fuel Injection

MPG – Miles Per Gallon

MPH – Miles Per Hour

MPI – Multi Port Injection

mS or ms – Millisecond

MSFF – Miles Since First Fail

MSIG – Multiple Spark-Ignition Gasket

MSLF – Miles Since Last Fail

MST – Manifold Surface Temperature

MT – Manual Transmission

MTV – Manifold Tune Valve

mV or mv – Milivolt

MVLPS – Manual Valve Lever Position

MVZ – Manifold Vacuum Zone

N – Nitrogen

N.C. – Normally Closed Position

N.O. – Normally Open Position

N/MIL – A Code Set Without a MIL Request

N/V – Input Shaft Speed to Vehicle Speed

NCAPS – Non-Contact Angular Position Sensor

NCRPS – Non-Contact Rotary Position Sensor

NDIR – Non Dispersive Infrared

NDS – Neutral Drive Switch

NGS – Neutral Gear Switch (Ford)

NGV – Natural Gas Vehicles

Nm – Newton Meters

NOx – Oxides of Nitrogen

NTC – Negative Temperature Coefficient

NVRAM – Non Volatile Random Access Memory

O2 – Oxygen

O2S-11 – Oxygen Sensor Signal (Bank 1)

O2S-21 – Oxygen Sensor Signal (Bank 2)

OASIS – Ford Motor Company Online Automotive Service Information System

OBD I – On Board Diagnostics Version I

OBD II – On Board Diagnostics Version II

OBD STAT – On Board Diagnostic System Status

OBEM – On-Board Emissions Measurement

OC – Oxidation Catalytic Converter

OCC – Output Circuit Check (Ford)

OCIL – Overdrive Cancel Indicator Lamp

OCS – Overdrive Cancel Switch

OCT ADJ – Octane Adjust Fuel Switch

OD – Overdrive

OD – Outside Diameter

ODM – Output Device Monitor

ODS – Overdrive Drum Speed

OE – Original Equipment

OEM – Original Equipment Manufacturer

OEM – Original Equipment Manufacturer

OHC – Overhead Cam Engine

OHV – Over Head Valve

OL – Open Loop

OLM – Oil Life Monitor

ORC – Oxidation Reduction Converter

OS – Oxygen Sensor

OSAC – Orifice Spark Advance Control (Chrysler)

OSC – Output State Check (Ford)

OSI – Open System Interconnect

OSM – Output State Monitor

OSS – Output Speed Shaft

OTIS – Overhead Travel Information System

OVCV – Outer Vent Control Valve

P/B – Power Brakes

P/E – Power Enrichment

P/N – Part Number

P/S – Power Steering

PA – Pressure Air (Honda)

PAFS – Pulse Air Feeder System (Chrysler)

PAIR – Pulsed Secondary Air Injection

PAS – passive Anti-Theft System

PAS – Power Assisted Steering

PASE – Passive Start and Entry (security system)

PASS – Personalized Automotive Security System

PC – Personal Computer

PC – Pressure Control

PCB – Printed Circuit Board

PCI – Programmable Communications Interface

PCM – Powertrain Control Module

PCO – Pressure Controlled Orifice (power steering)

PCS – Pressure Control Solenoid

PCV – Positive Crankcase Ventilation

PECV – Power Enrichment Control Valve

PF – Purge Flow Sensor

PFE – Pressure Feedback EGR Sensor

PFI – Port Fuel Injection

PFI – Port Fuel Injection (GM)

PGM-FI – Programmed Gas Management Fuel Injection (Honda)

PID – Parameter Identification Location

PID SUP – Parameter Identification Supported

PIP – Profile Ignition Pickup Signal

PIV – Peak Inverse Voltage

PKE – Passive Keyless Entry

PMD – Pump Mounted Driver

PNP – Par Neutral Position

POT – Potentiometer

PPM – Parts Per Minute

PPS – Accelerator Pedal Position Sensor

PPS – Ported Pressure Switch (Ford)

PR – Pressure Relief

PRC – Pressure Regulator Control

PRNDL – Switch

PROM – Programmable Read-Only Memory

PS – Power Steering

PSA – Pressure Switch Assembly

PSC – Power Steering Control

PSI – Pounds Per Square Inch

PSOM – Programmable Speedometer Odometer Module

PSOV – Purge Shut Off Valve (Ford)

PSP – Power Steering Pressure (switch)

PSPS – Power Steering Pressure Switch

PTC – Positive Temperature Coefficient Resistor

PTO – Power Take Off (4WD Option)

PTOX – Periodic Trap Oxidizer

PTU – Part Throttle Unlock

PVA – Ported Vacuum Advance

PVS – Ported Vacuum Switch

PWM – Pulse Width Modulation

PWM – Pulse Width Modulation

PWR GND – Power Ground for PCM

QDM – Quad Driver Module

RABS – Rear Antilock Brake System

RAM – Random Access Memory

RAP – Retained Access Power

RBS – Regenerative Braking system

RECAL – Calibration Adjustment

REDOX – Reduction Oxidation Converter

REF – Reference

RFCSS – Rear-Facing Child Safety Seat

RFI – Radio Frequency Interference

RHD – Right Hand Drive

RKE – Remote Keyless Entry

RM – Relay Module

ROM – Read Only Memory

RON – Rated Octane Number

RPC – Remote Parameter Test

RPM – Revolutions Per Minute

RPT – Reference Performance Test

RRS – Variable Reluctance Sensor

RTD – Real Time Dampening

RTN – Dedicated Sensor Ground Circuit

RTV – Room Temperature Vulcanizing

RVP – Reid Vapor Pressure

RWAL – Rear Wheel Anti-Lock

RWD – Rear Wheel Drive

S4WD – Selectable Four Wheel Drive

SAE – Viscosity Grade

SA-FV – Separator Assembly Fuel/Vacuum

SAVM – Spark Advance Vacuum Modulator

SAW – Spark Angle Work

SBDS – Service Bay Diagnostic System

SBEC – Single Board Engine Controller (replaced with PCM0

SBS – Boost Solenoid (Ford)

SBT – Serial Bus Traveler

SC – Supercharged Engine

SCAP – Silicone Capacitance Absolute Pressure Sensor (Ford)

SCARES – Selective Car Audio Receptive Evaluation System

SCB – Supercharger Bypass

SCC – Spark Control Computer (Chrysler)

SCF – Steering Characteristic Function

SCI – Serial Communications Interface

SCP – Standard Corporate Protocol

SCP – Standard Corporate Protocol

SDI – Saab Direct Ignition

SDM – Sensing Diagnostic Module

SDV – Spark Deceleration Valve

SDV – Spark Delay Valve

SEFI – Sequential Electronic Fuel Injection

SEO – Special Equipment Option

SES – Service Engine Soon (replaced with MIL)

SFI – Sequential Fuel Injection

SHED – Sealed Housing Evaporative Determination System

SHO – Super High Output Engine

SHRT FT – Short Term Fuel Trim

SHRTFT1 – Short Term Fuel Trim Bank 1

SIG RTN – Signal Return (sensor ground)

SIL – Shift Indicator Lamp

SIPS – Side Impact Protections System

SIR – Supplemental Inflatable Restraint

SIS – Solenoid Idle Stop

SMEC – Single Module Engine Controller (replaced with PCM)

SMPI – Sequential Multiport Fuel Injection (Chrysler)

SO2 – Sulfur Dioxide

SOHC – Single Overhead Cam

SPD – Speed

SPFI – Single Point Fuel Injection (throttle body)

SPI – Serial Peripheral Interface

SPL – Smoke Puff Limiter

SPOUT – Spark Output Signal

SPS – Service Programming System

SPS – Service Programming System

SRC – Selective Ride Control

SRDV – Spark Retard Delay Valve

SRI – Service Reminder Indicator

SRR – Short-Range Radar

SRS – Spark Retard Solenoid

SRS – Supplemental Restraint System (air bag)

SRT – System Readiness Test

SS – Speed Sensor (Honda)

SS1, SS2,etc. – Shift Solenoid 1, 2, etc.

SSI – Solid State Ignition (Ford)

ST – Scan Tool

STAR – Self Test Automatic Readout

STFT – Short-Term Fuel Trim

STI – Self Test Input

STI – Self-Test Input (Ford)

STO – Self Test Output

STO – Self-Test Output (Ford)

STS – Service Throttle System (lamp)

SUSP – Suspension System Module

SVV – Solenoid Vent Valve (Ford)

SWB – Short Wheel Base

TA – Temperature Air (Honda)

TAB – Thermactor Air Bypass

TAC – Throttle Actuator Control

TAC – Thermostatic Air Cleaner (GM)

TACH – Tachometer

TAD – Thermactor Air Diverter

TAP – Transmission Adaptive Pressure

TAV – Temperature Actuated Vacuum

TBI – Throttle Body Injection

TC – Turbocharger

TCA – Thermostat Controlled Air Cleaner

TCC – Torque Converter Clutch

TCCP – Torque Converter Clutch Pressure

TCCS – Toyota Computer Controlled System

TCI – Turbocharger and Intercooler

TCIL – Transmission Control Indicator Lamp

TCM – Transmission Control Module

TCP – Temperature Compensated Accelerator Pump (Ford)

TCP – Torque Charger

TCS – Transmission Controlled Spark (GM)

TCS – Traction Control Switch

TCS – Transmission Control Switch

TD – Turbo Diesel

TDC – Top Dead Center

TDI – Turbo Direct Injection

TE – Thermal Expansion

TFP – Transmission Fluid Pressure

TFP – Throttle Fluid Pressure

TFT – Transmission Fluid Temperature

THM – Turbo Hydra-Matic

TI – Transistorized Ignition System

TIC – Thermal Ignition Control (Chrysler)

TIR – Total Internal Reflector (headlights)

TIS – Toyota Information System

TIV – Thermactor Idle Vacuum Valve (Ford)

TK – Throttle Kicker Actuator (Ford)

TKS – Throttle Kicker Solenoid

TLA – Three-Layer Acronym

TOT – Transmission Oil Temperature

TP – Throttle Position

TP Mode – Throttle Position Mode

TPCV – Tank Pressure Control Valve

TPI – Tuned Port Injection

TPM – Tire Pressure Monitor

TPP – Throttle Position Potentiometer

TPS – Throttle Position Sensor

TPT – Throttle Position Transducer (Chrysler)

TR – Transmission Range Sensor

TRLHP – Thermal Vacuum Valve

TRS, TRS+1 – Transmission Regulated Spark Control System

TSB – Technical Service Bulletin

TSP – Throttle Solenoid Positioner (Ford)

TSS – Turbine Speed Shaft Sensor

TSS – Transmission Shaft Speed Sensor

TV – Throttle Valve

TVS – Temperature Vacuum Switch

TVV – Thermal Vent Valve (Ford)

TWC – Three Way Catalyst

TWC + OC – Three Way Catalyst

UART – Universal Asynchronous Receiver-Transmitter

UD – Underdrive

UHEGO – Universal Heated Exhaust Gas Oxygen-Sensor

UIDI – Up-Integrated Direct Ignition

USB – Universal Serial Bus

V – Volts

VAC – Vacuum

VAF – Volume Air Flow

VAF – Vane Airflow Meter

VAT – Vane Air Temperature Sensor

VATS – Vehicle AntiTheft System

VBAT – Vehicle (system) Battery Voltage

VCC – Vacuum Cut Control Solenoid

VCI – Vehicle Calibration Identification

VCM – Vehicle Control Module

VCRM – Variable Control Relay Module

VCTS – Vacuum Control Temperature Sensing Valve (Ford)

VCV – Vacuum Control Valve (Ford)

VDOT – Variable Displacement Orifice Tube

VDV – Vacuum Delay Valve

VDV – Vacuum Differential Valve (Ford)

VECI – Vehicle Emission Control Information Decal

VF – Vacuum Fluorescent

VFDES – Desired Volume of Fuel as Determined by the EEC Strategy

VIM – Vehicle Interface Module

VIN – Vehicle Identification Number

VIPER – Vehicle Initial Performance Evaluation Register

VIS – Variable Induction System

VLCM – Variable Load Control Module

VMV – Vapor Management Valve (EVAP)

VMV – Vacuum Modulator Valve

VNT – Variable Nozzle Turbocharger

VOTM – Vacuum Operated Throttle Modulator (Ford)

VPW – Variable Pulse Width

VPWM – Variable Pulse Width Modulated

VPWR – Ignition Switched Power

VR – Voltage Regulator

VR/S – Vacuum Regulator/Solenoid (Ford)

VRDV – Vacuum Retard Delay Valve (Ford)

VREF – Reference Voltage (from PCM)

VRESER – Vacuum Reservoir (Ford)

VREST – Vacuum Restrictor (Ford)

VRIS – Variable Resonance Induction System

VRS – Variable Reluctance Sensor

VRV – Vacuum Regulator Valve (Ford)

VSS – Vehicle Speed Sensor

VVA – Venturi Vacuum Amplifier (Ford)

VVC – Variable Voltage Choke (Ford)

VVTS – Variable Valve Timing Sensor

VVV – Vacuum Vent Valve (Ford)

W/B – Wheelbase

WAC – WOT A/C Cutout Relay

WACA – A/C WOT Cutout Relay Monitor

WOT – Wide Open Throttle

WOTV – Wide-Open Throttle Valve (Ford)

WSS – Wheel Speed Sensor

WU OC – Warm Up Oxidation Catalytic Converter

WU TWC – Warm Up Three Way Catalytic Converter

YRS – Yaw Rate Sensor

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