Car bibles automotive abbreviations - a lookup for all those 3-letter and 4-letter synonyms and codes that you'll find in cars.

Car Acronyms & Abbreviations

Don't know your SOHC from your socks? This page is a quick lookup and reference guide for all those acronyms and abbreviations that you'll find around the car industry. These can be used in specifications, sales brochures, warning lights - anywhere. Drop me a line with suggestions and omissions. With gushing thanks to Dave Haughey without whom this exhaustive list wouldn't exist.

2V
Two (Venturi) Valve (two barrel carburetor)
2v
Two Valve (cylinder head)
2WS
Two Wheel Steer
4EAT
Four speed Electronic Automatic Transmission
4V
Four (Venturi) Valve (four barrel carburetor)
4v
Four Valve (cylinder head)
4WAS
Four Wheel Air Suspension
4WD
Four Wheel Drive
4WS
Four Wheel Steer
12v
12 volt (electrical system)
16v
Sixteen valve (cylinder head)
AAT
Ambient Air Temperature
ABC
Active Body Control
ABS
Antilock Brake System
A/C
Air Conditioning
ACC
Adaptive Cruise Control
ACC
Automatic Climate Control
accel
Acceleration
accum
Accumulator
accy
Accessory
ACE
Active Cornering Enhancement
ACL
Air cleaner
ACM
Airbag Control Module
ACM
Audio Control Module
ACT
Air Charge Temperature
ADAS
Advanced Driver Assistance System
ADC
Automatic Distance Control
ADL
Automatic Door Lock
AECM
Airbag Electronic Control Module
A/F
Air Fuel Ratio (see also AFR)
AFC
Air Flow Control
AFC
Air Fuel Control
AFR
Air Fuel Ratio (see also A/F)
AGVS
Automated Guided Vehicle System
AHLD
Automatic Headlamp Levelling Device
AHR
Active Head Restraint
AHS
Active Handling System
AIS
Automatic Idle Speed
ALC
Automatic Level Control
ALT
Alternator (see also GEN)
AMM
Air Mass Meter
AMT
Automated Manual Transmission
AOD
Automatic Overdrive
AOS
Automatic Occupant Sensing
API
American Petroleum Institute
APO
Accessory Power Outlets
APP
Accelerator Pedal Position
ARC
Active Roll Control
ARC
Automatic Ride Control
ARS
Automatic Restraint System
ASARC
Air Suspension Automatic Ride Control
ASCD
Auto Speed Control Device
ASF
Audi Space Frame
ASG
Automatic-Shift Gearbox
ASR
Acceleration Slip Regulation
ASTC
Automatic Stability and Traction Control
A/T
Automatic Transmission
ATC
Automatic Temperature Control
ATDC
After Top Dead Center
ATF
Active Transfer Case
ATF
Automatic Transfer Case
ATF
Automatic Transmission Fluid
ATSLC
Automatic Transmission Shift Lock Control
ATTS
Advanced Torque Transfer System
AWD
All Wheel Drive
AYC
Active Yaw Control
BARO
Barometric (pressure)
BAS
Brake Apply Sensor
batt
Battery
BBK
Big Brake Kit
BBV
Brake Booster Vacuum
BCM
Body Control Module
BHP
Brake Horsepower
BLW
Brake Lining Wear
BMAP
Barometric and Manifold Absolute Pressure
BP
Back Pressure
BPA
Brake Pedal Applied
BPA
Bypass Air
BPMV
Brake Pressure Modulator Valve
BPP
Brake Pedal Position
BPW
Base Pulse Width
BTCM
Brake Torque Control Module
BTDC
Before Top Dead Center
BTSI
Brake Transmission Shift Interlock
C3I
Computer Controlled Coil Ignition
CAA
Canadian Automobile Association
CAA
Clean Air Act
CAB
Controller, Antilock Brake
CAC
Charge Air Cooler
CAFC
Company Average Fuel Consumption (Canada)
CAFE
Corporate Average Fuel Economy (USA)
CASE
Cranking Angle Sensing Error
CC
Climate Control
CC
Coast Clutch
CC
Cruise Control
CCD
Chrysler Collision Detection
CCCD
Catalytic Converter Cool-Down
CCD
Computer Controlled Dwell
CCDIC
Climate Control Driver Information Center
CCFL
Cold-Cathode Flourescent Lamp
CCM
Central Control Module
CCM
Chassis Control Module
CCP
Climate Control Panel
CCS
Climate Controlled Seat
CCS
Coast Clutch Solenoid
CDA
Cylinder De-Activation
CDR
Chrysler Diagnostic Readout
CDR
Crash Data Retrieval
CDRV
Crankcase Depression Regulator Valve
CEL
Check Engine Light (see also MIL)
CEAB
Cold Engine Air Bleed
CEMS
Catalyst Efficiency Management System
CEMS
Carbureted Engine Management System
CFI
Central Fuel Injection (replaced with TBI)
CFI
Continuous Fuel Injection
cfm
cubic feet per minute
CG
Center of Gravity
CHMSL
Center High Mounted Stop Lamp
CID
Cubic Inch Displacement
CID
Cylinder Identification
CKP
Crankshaft Position
CL
Closed Loop
CLCC
Closed Loop Carburetor Control
CLS
Coolant Level Switch
CLTBI
Closed Loop Throttle Body Injection
CLNT
Coolant
CMC
Compressor Motor Controller
cmd
Command
cmdd
Commanded
CMFI
Central Multi-port Fuel Injection
CMP
Camshaft Position
CMVSS
Canadian Motor Vehicle Safety Standards
CNG
Compressed Natural Gas
CO
Carbon Monoxide
CO2
Carbon Dioxide
comm
Communication
cond
Condition
const
Constant
COP
Coil On Plug
COP
Computer Operating Properly
CP
Canister Purge
CPC
Camshaft Position Control
CPI
Central Port Fuel Injection
CPP
Clutch Pedal Position
CPS
Cam Profile Switching
CPS
Childseat Postioning Sensor
CPU
Central Processing Unit
CRR
Cool Running Rotor
CS
Charging System
CSC
Commercial Stripped Chassis
CSFI
Central Sequential Fuel Injection
CSI
Compression Sense Ignition
CTD
Content Theft Deterent
CTOX
Continuous Trap Oxidizer
CTP
Closed Throttle Position (switch)
CTS
Coolant Temperature Sensor
CV
Constant Velocity
CVN
Calibration Verification Number
CVRSS
Continuously Variable Road Sensing Suspenion
CVRTD
Continuously Variable Real Time Damping
CVT
Continuously Variable Transmission
CZS
Crash Zone Sensor
DAB
Delayed Accessory Bus
DAB
Driver AirBag (module)
DART
Diagnostic And Reprogramming Tool
dB
Decibels
dBA
decibels on A-weighted scale
DBB
Dual Bed Bead
DBM
Dual Bed Monolith
DC
Direct Current
DC
Duty Cycle
DCCSM
Dual Climate Controlled Seat Module
DCM
Door Control Module
DDM
Driver's Door Module
DDS
Deflation Detection System
DDS
Driver's Door Switch
DE
Drive End
dec
Decrement
DEC
Digital Electronic Controller
DERM
Diagnostic Energy Reserve Module
des
Desired
DFCO
Deceleration Fuel CutOff
DFI
Direct Fuel Injection
DGI
Direct Gasoline Injection
DI
Distributor Ignition
DIC
Driver Information Center
diff
Differential
DIM
Dashboard Integration Module
dis
Disable
DIS
Direct (aka Distributorless) Ignition System (replaced with EI)
disc
Disconnect
DISI
Direct Injection, Spark Ignition
DIST
Distributor
DIY
Do It Yourself
DLC
Data Link Connector
DLC
Diamond Logic Computer
DMCM
Driver Motor Control Module
DMM
Digital MultiMeter
DMSD
Drive Motor Speed and Direction
DOHC
Double Overhead Cam
DNR
Dolby Noise Reduction
DOL
Data Output Line
DPFE
Differential Pressure Feedback EGR
DPI
Dual Plug Inhibit
DRB
Diagnostic Readout Box
DRF
Deactivating Roller Follower
DRL
Daytime Running Lamps
DRR
Digital Radio Receiver
DRW
Dual Rear Wheel
DSCC
Distance Sensing Cruise Control
DSDA
Dual Stage Driver Airbag
DSG
Direct Shift Gearbox
DSI
Dual Stage Inflator
DSM
Driver's Seat module
DSO
Digital Storage Oscilloscope
DSP
Digital Signal Process
DSPA
Dual Stage Passenger Airbag
DSRC
Dedicated Short Range Commnication
DSS
Downshift Solenoid
DSST
Dunlop Self Supporting Tyre
DTC
Diagnostic Trouble Code
DTM
Diagnostic Test Mode
DTR
Digital Transmission Range
DTT
Diesel Transmission Technologies
DVOM
Digital Volt-Ohmmeter
E4OD
Electronic 4-Speed Overdrive
E10
Ethanol 10 percent
E85
Ethanol 85 percent
EA
Electronic Accelerator
EAC
Electronic Air Control (replaced with AIR)
EAIR
Electronic (secondary) Air Injection Reaction
EAS
Electrically Assisted Steering
EAS
Electronic Air Switching
EATC
Electronic Automatic Temperature Control
EBC
Electronic Brake Control
EBCM
Electronic Brake Control Module
EBD
Electronic Brake force Distribution
EBM
Electronic Brake Module
EBP
Exhaust Back Pressure
EBTCM
Electronic Brake and Traction Control Module
EC
Electrical Center
EC
Electronic Control
E&C
Entertainment and Comfort
ECA
Electronic Control Assembly (replaced with PCM)
ECC
Electronic Climate Control
ECD
Electronically Controlled Deceleration
ECI
Extended Compressor at Idle
ECL
Engine Coolant Level
ECM
Electronic Control Module
ECM
Engine Control Module
ECS
Electronic Crash Sensor
ECS
Emission Control System
ECT
Engine Coolant Temperature (Switch, Sensor)
ECU
Electronic Control Unit
EDF
Electric Drive Fan (relay)
EDIS
Electronic Direct Ignition System (replaced with EI)
EDR
Event Data Recorder
EDSR
Electronic Dealer Service (Investigation) Report
EEC
Electronic Engine Control
EEDS
Electric-Electronic Distribution System
EEPROM
Electronically Erasable Programmable Read Only Memeory
EEVIR
Evaporator Equalized Values In Receiver
EFE
Early Fuel Evaporation
EFI
Electronic Fuel Injection
EFTA
Engine Fuel Temperature - Bank 1 Input DEGREES
EFTA V
Engine Fuel Temperature - Bank 1 Input VOLTS
EFTB
Engine Fuel Temperature - Bank 2 Input DEGREES
EFTB V
Engine Fuel Temperature - Bank 2 Input VOLTS
EGC
Electronic Gauge Cluster
EGO
Exhaust Gas Oxygen (replaced with O2S)
EGOG
EGO Ground
EGR
Exhaust Gas Recirculation
EGRBARO
Enable Baro Read instead of EGR pressure
EGRC
Exhaust Gas Recirculation Control
EGRCMDS
EGR Motor Commanded In Steps
EGRMC1
EGR Motor Control Output Command
EGRMC2
EGR Motor Control Output Command
EGRMC3
EGR Motor Control Output Command
EGBMC4
EGR Motor Control Output Command
EGRT
Exhaust Gas Recirculation Temperature (switch)
EGR TVV
Exhaust Gas Recirculation Thermal Vacuum Valve
EGRV
Exhaust Gas Recirculation Vent
EGRVR
EGR Valve Vacuum Control
EGTS
Exhaust Gas Temperature Switch (replaced with EGRT)
EHB
Electro-Hydraulic Brake
EHCU
Electronic Hydraulic Control Unit
EHOC
Electrically Heated Oxidation Catalyst
EHPA
Electro-Hydraulic Power Assist
EHPAS
Electric Hydraulic Power Assisted Steering
EHPS
Electro-Hydraulic Power Steering
EHTWC
Electrically Heated Three Way Catalyst
EI
Electronic Ignition (includes Distributorless Ignition System, formerly DIS)
ELC
Electronic Level Control
EM
Energy Management
EM
Engine Modification
EMAS
Engine Management and Analysis System
EMAT
Electro-Mechanical Automatic Transmission
EMB
Electromagnetic Brakes
EMB
Electro-Mechanical Brake
EMCC
Electronically Modulated Converter Clutch
EMF
ElectroMotive Force (voltage)
EMI
Electromagnetic Interference
EMR
Electronic Module Retard
EMR
Emission Maintenance Reminder
EMS
Engine Management System
EOBD
Enhanced On-Board Diagnostics
EOP
Engine Oil Pressure
EOT
Engine Oil Temperature
EOTF
Engine Oil Temperature Fault Detection
EOT V
Engine Oil Temperature Volts
EP
Exhaust Pressure
EPA
Environmental Protection Agency
EPACT
Energy Policy Act
EPC
Electronic Pressure Control
EPHS
Electrically Powered Hydraulic Steering
EPR
Exhaust Pressure Regulator
EPROM
Erasable Programmable Read Only Memory
EPS
Electric Power Steering
EPS
Electric Power Steering
EPS
Engine Position Sensor
EPT
EGR Pressure Transducer (replaced with PFE)
ERH
Extended Ride Height
ESB
Energy Storage Box
ESB
Expansion Spring Brake
ESC
Electrical Systems Controller
ESC
Electronic Spark Control
ESC
Electronic Suspension Control
ESC
Extended Service Contract
ESCM
Energy Storage Control Module
ESD
Electrostatic Discharge
ESM
EGR System Module
ESM
Electronic Steering Module
ESN
Electronic Serial Number
ESO
Engine ShutOff
ESOF
Electronic Shift On (the) Fly
ESP
Electronic Stability Program
EST
Electronic Spark Timing
ETBE
Ethyl Tertiary Butyl Ether
ETC
Electronic Temperature Control
ETC
Electronic Throttle Control
ETC
Electronic Timing Control
ETCC
Electronic Touch Climate Control
ETR
Electronically Tuned Receiver
ETS
Enhanced Traction System
EUDC
Extra-Urban Driving Cycle
EUDC-LP
Extra-Urban Driving Cycle for Low Power vehicles
EV
Electric Vehicle
EVA
Electronic Vibration Analyzer
EVAP
Evaporative Emission
EVAPCPF
Evaporative Emissions Canister Purge Fault YES/NO
EVAPCV
Evaporative Emissions Canister Purge Vent Control
EVAPCVF
Evaporative Emissions Canister Purge Vent Fault
EVAPPDC
Evaporative Emissions Canister Purge Control %
EVAPPF
Evaporative Purge Flow Input VOLTS
EVIC
Electronic Vehicle Information Center
EVMV
Electric Vapour Management Valve
EVO
Electronic Variable Orifice
EVP
EGR Valve Position (sensor)
EVR
EGR Vacuum Regulator
EVTOP
Enhanced Tactical Vehicle Occupant Protection
EVTM
Electrical & Vacuum Troubleshooting Manual
EWMA
Exponentially Weighted Moving Average
EXH
Exhaust
F4WD
Full Time Four Wheel Drive
FABS
Flexible Auto Body System
FAF
Fan Air Flow
FANDC
Variable Speed Fan Duty Cycle %
FANVARF
Variable Speed Fan Output Fault
FBC
Feedback Carburetor
FC
Fan Control
FC
Friction Curve
FCM
Front Control module
FCP
Fuel Cell Partnership
FCU
Front Control Unit
FCV
Fuel Cell Vehicle
FDBK
Feedback
FDC
Fuel Data Center
FEAD
Front End Accessory Drive (belt)
FED
Federal (except California)
FEDS
Fuel Enable Data Stream
FEDS
Flexible Engine Diagnostic System
FEIC
Fuel Economy Integrated Counter
FET
Field Effect Transistor
FEX
Front Exchanger
FF
Flexible Fuel
FFCRS
Front-Facing Child Restraint System
FFFP
Fuel-Flexible Fuel Processor
FFH
Fuel Fired Heater
FFS
Fine-blanking and Finishing System
FFS
Flexible Fuel Sensor
FFV
Flexible Fuel Vehicle
FFWS
Fuel Filter Water Separator
FI
Fuel Injection
FICM
Fuel Injector Control Module
FIDO
Flame Ionization Detector Optimization
FIM
Fuel Indicator Module
FIPL
Fuel Injection Pump Lever
FIPT
Fuel Inlet Pressure Test
Fl
Front Left
FLI
Fuel Level Indicator Input percent
FLI V
Fuel Level Indicator Input VOLTS
FLO
Fast Light-Off
flr
Floor
FLVV
Fill Limit Vent Valve
FM
Frequency Modulation
FMEM
Failure Mode Effects Management
FMVSS
Federal Motor Vehicle Safety Standards
FP
Fuel Pump
FPCM
Fuel injection Pump Control Module
FPDM
Fuel Pump Driver Module
FPF
Fuel Pump Output Fault
FPI
Fins Per Inch
FPM
Fuel Pump Monitor
FPR
Fuel Pump Regulator
FPRC
Fuel Pressure Regulator Circuit
FPS
Fast Pass Standard
FPSM
Fuel Pump Secondary Monitor
FPV
Ford Performance Vehicles
FR
Front Right
FRACAS
Failure Reporting And Corrective Action System
FRC
Forced
freq
Frequency
frnt
Front
FRP
Fuel Rail Pressure
FRS
Face Recognition System
FRV
First Response Vehicle
FSA
Field Service Action
FSDI
Four-Stroke, Direct Injection
FSI
Fuel Straight Injection
FSS
Forward Sensing System
FSVF
Fuel Solenoid Valve Fault
FSVM
Fuel Solenoid Valve Secondary Monitor
FT
Fuel Trim
FTP
Federal Test Procedure
FTP
Fuel Tank Pressure
FTPT
Fuel Tank Pressure Transducer
FUDC
Federal Urban Driving Cycle
FUELPW1
Injector Pulse Width Bank 1
FUELPW2
Injector Pulse Width Bank 2
FW
Flat Wire
fwd
Forward
FWD
Front Wheel Drive
GA
Gage
GA
Gravitational Acceleration
GAWR
Gross Axle Weight Rating
GCR
Global Concern Report
GCW
Gross Combined Weight
g/cyl
Grams per Cylinder
GCWR
Gross Combined Weight Rating
GDI
Gasoline Direct Injection
GEN
Generator
GENF
Generator Output Fault
GENFDC
Generator Field Control Output
GEM
Gasoline Engine Management
GEM
Generic Electronic Module
GFS
Generator Field Signal
GGT
Gas Guzzler Tax
GHG
GreenHouse Gas
GISMO
Geographic Information System, Mobile
GND
Ground
GOVN
Governor Module
GPCM
Glow Plug Control Module
GPS
Global Positioning System
GS
Garage Shift
g/sec
Grams per Second
GTL
Gas To Liquid
GVW
Gross Vehicle Weight
GVWR
Gross Vehicle Weight Rating
H
Hydrogen
H2DI
Hydrogen Direct Injection
H2O
Water
HAST
High Accelerated Stress Test
HB
Hatchback
HBA
Hydraulic Brake Assist
HBU
Hub Bearing Unit
HC
Hydrocarbons
HCCI
Homogeneous-Charge, Compression Ignition
HCM
Heating Control Module
HCM
Hybrid Control Module
HCU
Hydraulic Control Unit
HCV
Heavy Commercial Vehicle
H/CMPR
High Compression
HD
Heavy Duty
HDC
Heavy Duty Cooling
HDGV
Heavy Duty Gasoline-fueled Vehicle
HDR
High Data Rate
HD-UDDS
Heavy Duty Urban Dynamometer Driving Schedule
HEC
Hybrid Electronic Cluster
HEDF
High Speed Electro Drive Fan (relay or circuit)
HEGO
Heated Exhaust Gas Oxygen (sensor) (replaced with HO2S)
HEGOG
HEGO Ground (circuit)
HEPS
Hydraulic Electric Power Steering
HEUI
Hydraulic-actuated Electronically-controlled Unit Injector
HEV
Hybrid Electric Vehicle
HFC
High Fan Control
HFC
Hydraulic Fading Compensation
HFCF
High Speed Fan Control Fault
HFM
Hot Film Meter
HFP
High Fuel Pump
Hg
Mercury
Hi Alt
Hi Altitude
HICAS
High Capacity Actively Controlled Steering
HID
High Intensity Discharge
HIS
Horizontal Impact Sensor
hist
History
HLDT
Heavy Light-Duty Truck
HLOS
Hardware Limited Operating Strategy
HO
High Output
HO2S
Heated Oxygen Sensor
hp
Horsepower
HPDI
High Pressure Direct Injection
HPL
High Pressure Liquid
HPP
High Pressure Pump
HPS
Head Protection System
HPS
High Performance System
HPV
High Pressure Vapour
HPVS
Heat Pump Ventilation System
HRC
Headlamp Range Control
HSA
Head Side Airbag
HSC
High Swirl Combustion
HSCDS
High-Sensitivity Collision Detection System
HSDI
High-Speed Direct Injection
HSE
High-Speed Enrichment
HSEA
High Solar Energy Absorbing (glass)
HTCM
Heating-ventilation-air-conditioning Thermal Control Module
HTR11
Bank 1 Upstream 02S Heater Control
HTR11F
Bank 1 Upstream 02S Heater Circuit Fault
HTR12
Bank 1 Downstream O2S Heater Control
HTR12F
Bank 1 Downstream O2S Heater Circuit Fault
HTR21
Bank 2 Upstream O2S Heater Control
HTR21F
Bank 1 Downstream O2S Heater Circuit Fault
HTR22
Bank 2 Downstream 02S Heater Control
HTR22F
Bank 1 Downstream O2S Heater Circuit Fault
HTRX1
02S Upstream Heater Control
HTRX2
O2S Downstream Heater Control
HUD
Heads Up Display
HUD
Heads Up Display
HVAC
Heater-Vent-Air Conditioning
HVACM
Heater-Vent-Air Conditioning Module
HVI
High Viscosity Index
HVIL
High Voltage Interlock Loop
HVM
Heater Vent Mondule
HW
Heated Windshield
HWFET
Highway Fuel Economy Test (driving schedule)
HYPAS
Hydraulic Power Assisted Steering
Hz
Hertz
IA
Intake Air
IABM
Integrated AirBag Module
IAC
Idle Air Control
IAFM
Integrated Air Fuel Module
IAFS
Integrated Air Fuel System
IAT
Intake Air Temperature
iATN
International Automotive Technicians Network
IBOB
Intelligent BreakOut Box
IC
Ignition Control
IC
Integrated Circuit
ICA
Injector Cam Actuation
ICC
Intelligent Cruise Control
ICCS
Integrated Chassis Control System
ICDX
Integrated Compact Disc Changer
ICE
Internal Combustion Engine
ICM
Ignition Control Module
ICP
Injection Control Pressure
ICS
Integrated Chassis System
ICWS
Intersection Collision Warning System
ID
Identification
ID
Inside Diameter
IDI
Integrated Direct Ignition
IDIS
International Dismantling Information System
IDM
Ignition Diagnostic Module
IDM
Injector Driver Module
IDS
Integrated Diagnostic Software
IEDIS
Integrated Electronic Distributorless Ignition System
IFES
Integrated Front End System
IFI
Indirect Diesel Injection
IFS
Inertia Fuel Shutoff
IFSM
Integrated Fuel System Module
IGN
Ignition
ILC
Idle Load Compensator
ILEV
Inherently Low Emission Vehicle
illum
Illumination
I/M
Inspection Maintenance
IMA
Integrated Motor Assist
IMDX
Integrated Mini Disc Changer
IMLUT
Inspection/Maintenance Look-Up Table
immo
Immobilizer
IMPR
In-use Monitor Performance Ratio
IMRC
Intake Manifold Runner Control
IMRC F
Intake Manifold Runner Control Fault YES/NO
IMRCM
Intake Manifold Runner Control Monitor Input Bank 1 VOLTS
IMRCM2
Intake Manifold Runner Control Monitor Input Bank 2 VOLTS
IMS
Inductive Magnetic Saturation
IMS
Instant Mobility System
IMS
(2002 Cadillac Deville) Internal Mode Switch
IMSC
Intake Manifold Swirl Control
IMSC F
Intake Manifold Swirl Control Fault
IMT
Intake Manifold Tuning
IMTD
Intake Manifold Temperature Differential
IMTV
Intake Manifold Tuning Valve Control %
IMTVF
Intake Manifold Tuning Valve Fault
in
Inch(es)
inadv
Inadvertant
inc
Increment
INCA
In-Car Aquisition
incand
Incandescent
infl
Inflatable
init
Initial
INJ
Injection
INJ
Injector
INJ1F-8F
Fuel Injector Primary Fault Cylinders 1 thru 8
INJ9F-lOF
Fuel Injector Primary Fault Cylinders 9 and 10
INP
Input
inst
Instant
int
Interior
INT
Integrator (replaced with ST FUEL TRIM)
I/O
In/Out
IOC
Instant Oil Change
I/P
Instrument Panel
IPC
Instrument Panel Cluster
IPEC
Instrument Panel Electrical Center
IPM
Instrument Panel Module
IPM
Integrated Power Module
IPR
Injector Pressure Regulator
IRDS
Independant Rear Drive Suspension
IRQ
Interrupt Request
IRS
Independant Rear Suspension
ISA
Integrated Starter-Alternator
ISAD
Integrated Starter Alternator Damper
ISB
Interact System B
ISC
Idle Speed Control
ISG
Integrated Starter-Generator
ISI
Ion Sensing Ignition
ISO
Interior Systems Optimization
ISO
International Organisation for Standardisation
iso
Isolation
ISS
Input Shaft Speed
ITARDA
Institute for Traffic Acccident Research and Data Analysis
ITTB
Idle Time To Boil
ITTR
Inflatable Tubular Torso Restraint
ITS
Idle Tracking Switch
IVC
Integral Vapour Canister
IVCS
Integrated Vehicle Control System
IVI
Intelligent Vehicle Initiative
IVIS
In Vehicle Information System
IVMS
In Vehicle Monitoring System
IVS
Idle Validation Switch
IVSC
Integrated Vehicle Speed Control
i-VTEC
Intelligent Variable (valve) Timing (and lift) Electronic Control
IWC
Inertia Weight Class
JARI
Japan Automotive Research Institute
JTEC
Jeep, Truck Engine Control
JTEC
Joint Transmission-Engine Controller
KAM
Keep Alive Memory
KAPWR
Keep Alive power
KDD
Keyboard Display Driver
kg
Kilogram
kg/h
Kilograms per Hour
kHz
Kilohertz
km
Kilometer
km/h
Kilometers per Hour
km/l
Kilometers per Litre
KOEO
Key On Engine Off
KOER
Key On Engine Running
kPa
Kilopascal
KS
Knock Sensor
KS1 V
Knock Sensor Input Bank 1 VOLTS
KS2 V
Knock Sensor Input Bank 2 VOLTS
kV
Kilovolts
L
Liter(s)
L4
Four Cylinder Inline Engine
LATCH
Lower Anchors and Tethers for CHildren
LB
Long Box, Long Bed
LCD
Liquid Crystal Diode (as in LCD display)
LCM
Lighting Control Module
LDAS
Lane Departure Avoidance System
LDCL
Left Door Control Locking
LDCM
Left Door Control Module
LDDT
Light Duty Diesel Truck
LDGT
Light Duty Gasoline (fueled) Truck
LDM
Lamp Driver Module
LDP
Leak Detection Pump
LDR
Low Data Rate
lduty
Light Duty
LEADER
Low Emissions Advanced Engine Range
LED
Light Emitting Diode
LEP
Light Emitting Polymer
LEV
Low Emissions Vehicle
LF
Left Front
LFC
Lamp Fault Code
LFC
Low Fan Control
LFCF
Low Speed Fan Control Fault
LFWS
Left Front Wheel Speed
LFCS
Low Flow Cooling System
LFP
Low Fuel pump
LGM
Lift Gate Module
LH
Left Hand
LIE
Laterally Inclined Engine
L/M
Litres Per Minute
lm
Lumens
LMD
Left Mid Door
LNG
Liquid Natural Gas
LO
Low
LOMA
Lifter Oil Manifold Assembly
LONGFT1
Long Term Fuel Trim Bank 1 %
LONGFT2
Long Term Fuel Trim Bank 2 %
LOS
Limited Operation Strategy
LPA
Low Pressure Accumulator
LPG
Liquified Petroleum Gas
LPM
Litres Per Minute
LPO
Limited Production Option
LPS
Low Pressure Sensor
LR
Left Rear
LR
Loaded Radius
LRA
Latching Rocker Arm
LRD
Left Rear Door
lrn
Learn
LSD
Limited Slip Differential
LSEGR
Linear Solenoid Exhaust Gas Recirculation
LSP and BV
Load Sensing Proportioning and Bypass Valve
LSUV
Luxury Sport Utility Vehicle
LT
Left
LT
Long Term (Fuel Trim)
LTA
Low Temperature Aftercooling
LTD
Long-Travel Dampened (clutch)
LTPI
Low Tyre Pressure Indicator
LTPWS
Low Tyre Pressure Warning System
LUS
Lock-Up Solenoid (see TCC)
LV8
Load Variable 8 Cylinder
LVDT
Linear Variable Differential Transducer
LVL
Level
LWB
Long WheelBase (see LB)
MAF
Mass Air Flow
malf
Malfunction
MALL
Multifunction Alarm Lighting and Locking
MAN
Manufacturer
MAP
Manifold Absolute Pressure
Map
Large folded piece of colourful paper
MAT
Manifold Air Temperature
MC
Measuring Core
MC
Mixture Control
MCM
Message Center Module
MCNU
Multiband Configurable Networking Units
MCU
Microprocessor Control Unit
MD
Mini Disc
MD
Modulated Displacement
MDP
Manifold Differential Pressure
MDS(2)
Mopar Diagnostic System
MDX
Mini Disc Changer
MECS
Mazda Electronic Control System
med
Medium
MEM
Memory
MEMCAL
Memory Calibration
MFC
Medium Speed Fan Control ON/OFF
MFCF
Medium Speed Fan Control Fault YES/NO
MFI
Multiport Fuel Injection
MFI
Multi Function Indicator
MGMT
Management
MIC
Mechanical Instrument Cluster
MID
Midrange
MID
Monitor Identification
MIL
Malfunction Indicator Lamp
MIN
Minimum
MIN
Minute
MIN
Mobile Identification Number
MIP
Mixer Inlet Pressure
ML
Manual Longitudinal
MLP(s)
Manual Lever Position (sensor)
mm
Millimetre
mm3
Cubic Millimetre(s)
MMC
Manifold Mounted Converter
mmhg
Millimeters of mercury
MMM
Memory Mirror Module
MMT
Methylcyclopentadienyl Manganese Tricarbonyl
mod
Module
mon
Monitor
MPa
Megapascal
MPFI
Multiport Fuel Injection
ms
Millisecond
MSFF
Miles Since First Fail
MSLF
Miles Since Last Fail
MSM
Memory Seat Module
MSO
Mixed Signal Oscilloscope
MSRP
Manufacturers Suggested Retail Price
MST
Manifold Surface Temperature
MSVA
Magnetic Steering Variable Assist
M/T
Manual Transmission/Transaxle
MTBE
Methyl Tertiary Butyl Ether
MTBF
Mean Time Between Failures
MTV
Manifold Tuning Valve
MV
Megavolt
mV
Millivolt
MVLPS
Manual Valve Lever Position Sensor
MVSA
Motor Vehicle Safety Act
MVSS
Motor Vehicle Safety Standards
MY
Model Year
NAAO
North American Automotive Operations
NAES
North American Export Sales
NAICC
Navigation-Aided Intelligent Cruise Control
NATS
Nissan Anti-Theft System
NC
Normally Closed
NCAP
New Car Assessment Program
NDH
Navigation Display Head
NEG
Negative
NEU
Neutral
NFF
No Fault Found
NG
Natural Gas
NGS
New Generation STAR (Self Test Automatic Readout)
NGSC
Next Generation Speed Control
NGTP
Next Generation Telematics Protocol
NGV
Natural Gas Vehicle
NGV
New Generation Vehicle
NGVM
Natural Gas Vehicle Module
NHTSA
National Highway Traffic Safety Administration
NI
Neutral Idle
NiMH
Nickel Metal Hydride
NLGI
National Lubricating Grease Institute
N-m
Newton Meters
NO
Normally Open
NOx
Nitrogen Oxides
NoVRAM
Non Volatile Random Access Memory
NPF
No Problem Found
NPTC
National Pipe Thread Coarse
NPTF
National Pipe Thread Fine
NSBU
Neutral Safety Back Up
NV
Night Vision
NVH
Noise, Vibration and Harshness
NVLD
Natural Vacuum Leak Detection
NVRAM
Non Volatile Random Access Memory
NYCC
New York City Cycle
O2
Oxygen
O2S
Oxygen Sensor
OAD
Overrunning Alternator Decoupler
OAP
Overrunning Alternator Pulley
OASIS
Online Automotive Service Information System
OASIS
Organization for the Advancement of Structured Information Standards.
OBD
On Board Diagnostics
OBD II
On Board Diagnostics, Generation 2
OC
Oxidation Catalyst Only
OCC
Output Circuit Check
OCR
Oil Control Ring
OCS
Occupant Classification Sensor
OCS
Opportunity Charge Station
OD
Outside Diameter
OD
Overdrive
ODM
Output Drive Module
ODO
Odometer
OE
Original Equipment
OEM
Original Equipment Manufacturer
OHC
Overhead Camshaft
OL
Open Loop
OLED
Organic Light Emitting Diode
OPR
Over Pressure Relief
ORC
Oxidation Reduction Converter
ORC
Occupant Restraint Controller
ORVR
On-board Refueling Vapour Recovery
OSC
Output State Check
OSC
Output State Control
OSGI
Open-Service Gateway Interface
OSS
Output Shaft Speed
OTC
Overhead Trip Computer
OTIS
Overhead Travel Information System
OTM
Output Test Monitor
PAB
Passenger Air Bag
PADS
Passenger Airbag Disarm Switch
PAG
Polyalkylene Glycol
PAG
(Ford) Premier Automotive Group
PAIR
Pulsed Secondary Air Injection
PASE
PAssive Start and Entry system
PASM
Porche Active Steering Management
PASS
Passenger
PASS
Personalized Automotive Security System
PATS
Passive Anti-Theft System
PB
Power Brakes
PC
Pressure Control
PCB
Printed Circuit Board
PCI
Programmable Communications Interface
PCI
Programmable Controller Interface
PCM
Power Control Module
PCM
Powertrain Control Module
PCS
Pre-Crash Sensor
PCS
Pressure Control Solenoid
PCV
Positive Crankcase Ventilation
PDC
Park Distance Control
PDC
Parts Distribution Center
PDC
Power Distribution Center
PDS
Passenger Door Switch
PDS
Portable Diagnostic Software
PDV
Parcel Delivery Van
PEB
Power Electronics Bay
PEM
Proton Electric Membrane
PEMFC
Proton Exchange Membrane Fuel Cell
PEP
Peripheral Expansion Port
PFE
Pressure Feedback EGR
PFI
Port Fuel Injection
PFM
PDS File Manager
PFS
Purge Flow Sensor
PHEV
Plug-in Hybrid Electric Vehicle
PHT
Parallel Hybrid Truck
PID
Parameter Identification
PIM
Power Inverter Module
PIP
Profile Ignition Pickup (replaced with CKP)
PKE
Passive Keyless Entry
PLL
Phase Locked Loop
PM
Permanent Magnet
PMD
Pump Mounted Driver
PMV
Pressure Modulator Valve
P/N
Part Number
PNP
Park/Neutral Position
POA
Pilot Operated Absolute
pos
Position
POS
Positive
POT
Potentiometer
P-PC
Pocket Personal Computer
ppm
Parts Per Million
PPS
Passenger Presence Sensor
PRNDL
Park Reverse Neutral Drive Low
PROM
Programmable Read Only Memory
PROX
PReferential OXidation
PS
Power Steering
PSA
Pressure Switch Assembly
PSCM
Passenger Seat Control Module
PSCM
Power Steering Control Module
PSD
Power Sliding Door
psgr
Passenger
psi
Pounds Per Square Inch
psia
Pounds Per Square Inch Absolute
psig
Pounds Per Square Inch Gauge
PSIR
Passenger Supplemental Inflatable Restraint
PSM
Passenger Seat Module
PSOM
Programmable Speedometer/Odometer Module
PSP
Power Steering Pressure
PSV
Public Service Vehicle
PTC
Pending Trouble Code
PTC
Positive Temperature Coefficient
PTO
Power Takeoff
PTOX
Periodic Trap Oxidizer
PTU
Part Throttle Unlock
PWM
Pulse Width Modulation
PWR
Power
PZEV
Partial Zero Emision Vehicle
PZM
Platform Zone Module
QDM
Quad Driver Module
QDR
Quality, Durability, Reliability
QVM
Qualified Vehicle Modifier
R/A
Resume or Accelerate
RABS
Rear Antilock Brake System
RAC
Remote Accessory Controller
RAM
Random Access Memory
RAM
Ride Air Module
RAM
Remote Anti-theft Module
RAP
Retained Access Power
RAV
Remote Activation Verification
RBC
Rotary Blade Coupling
RCC
Rear Climate Control
RCC
Remote Climate Control
RCM
Restraint Control Module
RCDLR
Remote Control Door Lock Receiver
RDCM
Right Door Control Module
RDM
Rear Door Module
RDS
Radio (broadcast) Data System
RDS
Radio Display System
rec
Receive
recal
Recalibrate, Recalibration
RECIS
Remote Entry Control and Immobilizer System
REDOX
Reduction Oxidation Catalytic Converter
REEGR
Rotary Electric EGR
REF
Reference
RESC
Remote Emergency Satellite Unit
REX
Rear Exchanger
RF
Radio Frequency
RF
Right Front
RFA
Remote Function Actuator
RFF
Roller Finger Followers
RFI
Radio Frequency Interference
RFID
Radio Frequency Identification
RFWS
Right Front Wheel Speed
RH
Right Hand
RIM
Radio Interface Module
RIM
Rear Integration Module
RKE
Remote Keyless Entry
Rly
Relay
RM
Relay Module
RMD
Right Mid Door
ROM
Read Only Memory
RPA
Rear Parking Assist
RPM
Remote Power Module
RPM
Revolutions Per Minute
RPO
Regular Production Option
R&R
Remove and Replace
RR
Right Rear
RRD
Right Rear Door
RSA
Rear Seat Audio
RSC
Roll Stability Control
RSE
Roadside Equipment
RSS
Reverse Sensing System
RSS
Road Sensing Suspension
R/T
Road/Track
RT
Right
RTC
Real-Time Clock
RTD
Real Time Dampening
RTN
Return
RTT
Reconfigurable Telltale
RTTP
Rotunda Technician Tool Program
RTV
Room Temperature Vulcanizing
RV
Recreational Vehicle
RVAC
Rear Video/Audi/HVAC Module
RVP
Reid Vapour Pressure
RWAL
Rear Wheel Anti-lock
RWD
Rear Wheel Drive
RWS
Rear-Wheel Steer
S4WD
Selectable Four Wheel Drive
SAE
Society of Automotive Engineers
SAF
Stabilized Aluminum Foam
SAS
Side Auxiliary Sensor
SATC
Semi-Auto Temperature Control module
SAVDAS
Stand-Alone Vehicle Data Aquisition System
SAW
Spark Angle Word
SB
Short Box, Short Bed
SBDS
Service Bay Diagnostic System
SBEC
Single Board Engine Controller (replaced with PCM)
SBM
Standard Body Module
SBS
Supercharger Bypass Solenoid
SBT
Serial Bus Traveller
SC
Supercharger
SCA
Supplemental Coolant Additive
SCB
Supercharger Bypass
SCCA
Sports Car Club of America
SCI
Serial Communications Interface
SCIL
Steering Column/Instrument panel Lighting
SCM
Seat Control Module
SCP
Standard Corporate Protocol
SCS
Side Crash Sensor
SCTM
Seatbelt Timer Control Module
SCV
Speed Controlled Volume
SDARS
Satellite Digital Audio Radio System
SDL
Serial Data Link
SDM
Sensing and Diagnostic Module
SDRS
Satellite Digital Receiver System
SDS
Satellite Discriminating Sensor
SDS
Shock Dampening System
SDV
Spark Delay Valve
SEFI
Sequential Electronic Fuel Injection (replaced with SFI)
SEMA
Specialty Equipment Market Association
SEO
Special Equipment Option
SES
Service Engine Soon (replaced with MIL)
SFI
Sequential (multiport) Fuel Injection
SGCM
Starter/Generator Control Module
SHO
Super High Output
SI
System International
SIAB
Side Impact Air Bag
SIACM
Side Impact Air Bag Control Module
SIG RTN
Signal Return
SIL
Shift Indicator Lamp
SIR
Supplemental Inflatable Restraint
SIS
Side Impact Sensor
SKIM
Sentry Key Imobilizer Module
SLB
Smart Junction Box
SLA
Short/Long Arm suspension
SMCC
Stepper Motor Cruise Control
SMEC
Single Module Engine Controller (replaced with PCM)
SMPI
Sequential Multi-Port Injection
SNSR
Sensor
SO2
Sulphur Dioxide
SOC
State Of Charge
SOD
Side Object Detection
SOH
State of Health
sol
Solenoid
S/P
Series/Parallel
SP
Splice Pack
SPD
Speed
SPI
Serial Peripheral Interface
SPL
Smoke Puff Limiter
SPS
Service Programming System
SPS
Speed Signal
SPO
Service Parts Operations
SPOUT
Spark Output
SPRK_ACT
Spark Advance Actual
SPS
Service Programming System
SRC
Selective Ride Control
SRG
Solar-Reflective Glass
SRI
Service Reminder Indicator
SRI
Short Ram Intake
SrPP
Self-reinforced PolyPropylene
SRS
Supplemental Restraint System
SRW
Single Rear Wheel
SS
Shift Solenoid
SS
Speed Signal
SSM
Suspension Steering Module
SSS
Speed Sensitive Steering
SSV
Shift Solenoid Valve
ST
Scan Tool
ST
Short Term (Fuel Trim)
STAR
Self Test Automatic Readout (tester)
STAR
Stolen Auto Recovery System
STC
Snap To Connect
STC
Step Timing Control
stdby
Standby
STI
Self Test Input
STID
Station Identification
STL
Service Transmission Lamp
STO
Self Test Output
STS
Service Technicians Society
SULEV
Super Ultra Low Emission Vehicle
SUV
Sport Utility Vehicle
SVO
Straight Vegetable Oil
SVS
Service Vehicle Soon
SVT
Special Vehicle Team
S/W
Software
sw
Switch
SWB
Short WheelBase (see SB)
SWC
Steering Wheel Controls
SWPS
Steering Wheel Position Sensor
SWS
SideWall tension Sensor
SXR
Send and Receive
syn
Synchronize
sys
System
TAB
Thermactor Air Bypass (replaced with AIRB)
TAC
Throttle Actuator Control
TACH
Tachometer
TACM
Throttle Actuator Control Module
TAD
Thermactor Air Divert (replaced with AIRD)
TAP
Transmission Adaptive Pressure
TAS
Trap Alert System
TB
Throttle Body
TBC
Truck Body Controller (or Computer)
TBI
Throttle Body Fuel Injection
TC
Transmission Control
TC
Turbocharger
TCC
Torque Converter Clutch
TCCS
Toyota Computer Controlled System
TCIL
Transmission Control Indicator Lamp
TCM
Transmission Control Module
TCS
Traction Control System
TCS
Transmission Control Switch
TDC
Top Dead Center
TDI
Toyota Direct Ignition
TED
Thermo Electric Device
tele
Telescope
TEMP
Temperature
TFI
Thick Film Integrated (replaced with DI)
TFP
Transmission Fluid Pressure
TFT
Transmission Fluid Temperature
TGS
Top Gear Switch
THEMIS
Thermal Management Intelligent System
THM
Turbo Hydra-Matic
THS
Transmission Hydraulic Switch
TID
Test Identification
TIIS
Thermal Imaging Inspection Station
TIM
Tyre Inflation Module
TIM
Tyre Inflation Monitor
TIS
Techline Information System
TOC
Transmission Oil Cooler
torq
Torque
TOT
Transmission Oil Temperature
TP
Throttle Position
TPA
Terminal Positive Assurance
TPI
Tuned Port Injection
TPMS
Tyre Pressure Monitor System
TPS
Throttle Position Sensor
TR
Transmission Range
T-RAC
Trailer Rotating Air Chamber
trans
Transmission/Transaxle
TRDU
Trailer Remote Diagnostic Unit
TRS
Transmission Range Sensor
TSA
Thorax Side Airbag
TSB
Technical Service Bulletin
TSI
Two Speed Idle
TSS
Transmission Speed Sensor
TSS
Turbine Shaft Speed
TT
Telltale Lamp
TTM
Tilt and Telescope Module
TTS
Transmission Temperature Switch (replaced with TOT)
TV
Television
TV
Throttle Valve
TVAM
Televison Antenna Module
TVR
Turbine Vane Regulator
TVRS
Television and Radio Suppression
TVS
Thermal Vacuum Switch
TVV
Thermal Vacuum Valve
TWC
Three Way Catalyst
TWC+OC
Three Way Catalyst + Oxidation Catalyst
twtr
Tweeter
TXV
Thermal Expansion Valve
UASID
Units And Scaling Identification
UART
Universal Asynchronous Receiver-Transmitter
UD
Underdrive
UDDS
Urban Dynamometer Driving Schedule
U/H
Underhood
U/HEC
Underhood Electrical Center
UIDI
Up-Integrated Direct Ignition
ULEV
Ultra Low Emissions Vehicle
ULSD
Ultra Low Sulphur Diesel
UMTS
Universal Mobile Telecommunications System
unlk
Unlock
USCAR
United States Council for Automotive Research
UTD
Universal Theft Deterrent
UTQG
Uniform Tyre Quality Grading
V
Volts
V2G
Vehicle to Grid
VAC
Vacuum
VAC
Vehicle Access Code
VACS
Vehicle Access Control System
VAF
Vane Air Flow
VAF
Volume Air Flow
VAPS
Variable Assist Power Steering
VAPS
Virtual Automotive Prototyping System
VASCO
Vehicle Application-Specific Computer
VAT
Vane Air Temperature (replaced with IAT)
VAT
Visual Authoring Tool
VATS
Vehicle AntiTheft System
VB
Valve body
VCC
Viscous Converter Clutch
VCI
Vehicle Communication Interface
VCIM
Vehicle Communication Interface Mode
VCL
Vehicle Communication Link
VCM
Variable Cylinder Management
VCM
Vehicle Communication Module
VCM
Vehicle Control Module
VCRM
Variable Control Relay Module
VCT
Variable Camshaft Timing
VDCS
Vehicle Dynamics Control System
V dif
Voltage Difference
VDIS
Vehicle Diagnostic Information System
VDM
Vehicle Dynamics Module
VDM
Vehicle Dynamics Monitor
VDOT
Variable Displacement Orifice Tube
VDP
Vehicle Dynamics Processor
VDR
Vehicle Data Recorder
VDR
Vehicle Dealer Recorder
VDS
Valve Deactivation System
VDV
Vacuum Delay Valve
VECI
Vehicle Emission Control Information
VEDR
Vehicle Event Data Recorder
veh
Vehicle
vel
Velocity
ver
Version
vert
Vertical
VES
Variable Effort Steering
VF
Vacuum Flourescent
VGT
Variable Geometry Turbocharger
VIC
Virtual Image Cluster module
VICS
Vehicle Information Communication System
VIIC
Vehicle Infrastructure Integration Consortium
VIN
Vehicle Identification Number
VIP
Vehicle Intrusion Protection
VIU
Vehicle Interface Unit
VLCM
Variable Load Control Module
VLR
Voltage Loop Reserve
vlv
Valve
VMM
Vehicle Measurement Module
VMRS
Vehicle Maintenance Reporting System
VMV
Vacuum Modulator Valve
VMV
Vapour Management Valve
VNT
Variable Nozzle Turbine
VNT
Variable Nozzle Turbocharger
VOTM
Vacuum Operated Throttle Modulator
VPWR
Vehicle Power
VR
Vacuum Regulator
VREF
Voltage Reference
VRLA
Valve Regulated Lead Acid
VRV
Vacuum Reducer Valve
VRIS
Variable Resonance Induction System
VS
Variable Speed
VSC
Vehicle Stability Control
VSES
Vehicle Stability Enhancement System
vspd
Vehicle speed
VSS
Vehicle Speed Sensor
VSV
Vacuum Solenoid Valve
VTA
Vehicle Theft Alarm
VTD
Vehicle Theft Deterrent
VTEC
Variable (valve) Timing (and lift) Electronic Control
VTSS
Vehicle Theft Security System
VVT-i
Variable Valve Timing with Intelligence
VVTL-i
Variable Valve Timing and Lift with Intelligence
w/
With
WAC
Wide Open Throttle A/C Cutoff
warn
Warning
W/B
Wheelbase
WCF
Wireless Communication Framework
WDS
Workbay Diagnostic System
WDS
Worldwide Diagnostic System
WGC
Wastegate Control
WHL
Wheel
WIF
Water In Fuel (sensor)
w/o
Without
WOT
Wide Open Throttle
W/P
Water Pump
WSM
WorkShop Manual
WSS
Wheel Speed Sensor
WU-OC
Warmup Catalyst with Oxidation Catalyst
WU-TWC
Warmup Catalyst with Three Way Catalyst
WVO
Waste Vegetable Oil
WVVWS
Wireless Vehicle to Vehicle Warning System
X-valve
Expansion Valve
xVDS
Extended Vehicle Diagnostic System
ZEV
Zero Emission Vehicle