• Truck Industry Acronyms Explained

    In the heavy truck industry common acronyms like DPF, DTC, and ECM get thrown around every day. Whether you are reading a blog post, researching capabilities of a diagnostic tool, flipping through an OEM manual, or deciphering a wiring diagram, you are bound to come across one of the hundreds of different acronyms that populate this industry. With so many acronyms, it is nearly impossible to know them all. In this blog post, the team at Diesel Laptops has compiled a list of more than 900 industry acronyms that should help eliminate any confusion going forward no matter what type of heavy truck document you are reading.

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    Truck Industry Acronyms

    1 BBL
    1 Barrel Carburetor
    2 BBL
    2 Barrel Carburetor
    2 VH
    2 Valve Head
    3 BBL
    3 Barrel Carburetor
    4 BBL
    4 Barrel Carburetor
    4 VH
    4 Valve Head
    A/C
    Air Conditioning
    A/D
    Analog To Digital
    A/F
    Air/Fuel Ratio
    A/T
    Automatic Transaxle
    A/T
    Automatic Transmission
    AAC
    Auxiliary Air Control
    AAT
    Ambient Air Temperature
    AAV
    Anti Afterburn Valve
    ABS
    Anti-Lock Brake System
    ACC
    Accessory Key Position
    ACERT
    Advanced Combustion Emissions Reduction Technology
    ACL
    Air Cleaner
    ACM
    Air Bag Control Module
    ACR-4
    Air Conditioning Refrigerant, Recovery, Recycling, Recharging
    ACT
    Air Charge Temperature
    ADSTWC
    Adsorbing Twc
    AECM
    Air Bag Electronic Control Module
    AFC
    Air Flow Control
    AFR
    Air Filter Restriction
    AFR
    Air Fuel Ratio
    AFRC
    Air Fuel Ratio Control
    AFS
    Air-Fuel Ratio Sensor
    AFT
    Aftertreatment
    AIH
    Air Intake Heaters
    AIR
    Secondary Air Injection
    AIR/AIRE
    Secondary Air Injection (Belt Driven) / (Electric Driven)
    AIRB
    Secondary Air Injection Bypass
    AIRD
    Secondary Air Injection Diverter
    AIS
    Secondary Air Injection
    AIT
    Air Intake Temperature
    ALDL
    Assembly Line Diagnostic Link
    ALSG
    Automotive Limiting Speed Governor
    ALVW
    Adjusted Lvw
    AM1
    Thermactor Air Management 1 (Tab)
    AM2
    Thermactor Air Management 2 (Tab Or Tad)
    AMS
    Air Management System
    AP
    Accelerator Pedal
    API
    American Petroleum Institute
    APK
    Accelerator Pedal Kickdown
    APP
    Accelerator Pedal Position
    APPS
    Accelerator Pedal Position Sensor, Sometimes Simply Accelerator Position Sensor
    APS
    Accelerator Position Sensor
    ARS
    Automatic Restraint System
    ASD
    Automatic Shutdown
    ASDM
    Air Bag System Diagnostic Module
    ASET
    Application Specific Engine Technology
    ASR
    Automatic Slip Regulation
    ATC
    Active Transfer Case
    ATDC
    After Top Dead Center
    AUXP
    Auxiliary Pressure
    AUXT
    Auxiliary Temperature
    AWL
    Amber Warning Lamp
    B+
    Battery Positive Voltage
    B10
    Method Of Approximating Diesel Engine Service Life, See What Is B10 And B50 Life.
    B20
    Common Biodiesel Blend; 20% Biodiesel, 80% Petroleum Diesel.
    B5
    Common Biodiesel Blend; 5% Biodiesel, 95% Petroleum Diesel.
    B50
    Method Of Approximating Diesel Engine Service Life, See What Is B10 And B50 Life.
    BAP
    Barometric Atmosphere Pressure
    BAR
    Bureau Of Auto Repair
    BARO
    Barometric Absolute Pressure
    BBL
    Barrel
    BCAN
    Bleed Carbon Canister
    BCM
    Body Control Module
    BCP
    Brake Control Pressure
    BCS
    Boost Control Solenoid
    BID
    Breakerless Inductive Discharge
    BOB
    Breakout Box
    BOO
    Brake On/Off
    BP
    Barometric Pressure
    BPA
    Bypass Air
    BPP
    Brake Pedal Position
    BPS
    Brake Pressure Switch
    BPT
    Backpressure Transducer
    BSV
    Brake Shut-Off Valve
    BTDC
    Before Top Dead Center
    BVT
    Backpressure Variable Transducer
    BW
    Borgwarner, Popular Transfer Case Manufacturer And Drivetrain Component Supplier For Various Automakers.
    C
    Continuous Memory
    C
    Celsius
    C3
    Computer Command Control
    C-4
    Computer Controlled Catalytic Converter
    CA
    California
    CAB
    Controller Anti-Lock Brake
    CAC
    Charge Air Cooler, Synonymous With Intercooler Or Aftercooler.
    CACOT
    Charge Air Cooler Outlet Temperature Can
    CAN
    Controller Area Network, Protocol For Diagnostic Systems
    CAN-H
    Controller Area Network High
    CAN-L
    Controller Area Network Low
    CANP
    Canister Purge
    CAP
    Cold Ambient Protection
    CARB
    California Air Resources Board
    CARB
    Carburetor
    CAT
    Catalytic Converter
    CB
    Crankcase Breather
    CBD
    Closed Bowl Distributor
    CC
    Cubic Centimeter
    CCA
    Center Control Assembly
    CCA
    Cold Cranking Ampere
    CCB
    Crankcase Breather
    CCC
    Converter Clutch Control Solenoid
    CCCI
    Computer Controlled Coil Ignition
    CCD
    Chrysler Collision Detection
    CCD
    Computer Controlled Dwell
    CCECS
    Computer Controlled Emission Control System
    CCO
    Converter Clutch Overdrive Solenoid
    CCOSS
    Crankcase Oil Separator Speed
    CCOT
    Cycling Clutch Orifice Tube
    CCP
    Carbon Canister Purge
    CCP
    Crankcase Pressure
    CCPS
    Crankcase Pressure Sensor
    CCRM
    Constant Control Relay Module
    CCS
    Coast Clutch Solenoid
    CCS
    Cruise Control Switches
    CCV
    Closed Crankcase Ventilation
    CCV
    Coolant Control Valve
    CDI
    Common Rail Direct Injection
    CDR
    Crankcase Depression Regulator
    CDROM
    Compact Disc Read Only Memory
    CEC
    Computerized Emission Control System
    CEL
    Check Engine Light
    CERT
    Certification
    CES
    Clutch Engage Switch
    CFI
    Continuous Fuel Injection
    CFI
    Central Fuel Injection (aka Throttle Body Fuel Injection)
    CFM
    Cubic Feet Per Minute
    CFRM
    Condenser Fan Relay Module
    CFS
    Cubic Feet Per Second
    CFV
    Coolant Flow Valve
    CGI
    Clean Gas Induction
    CID
    Cubic Inch Displacement
    CIS
    Constant Injection System
    CIS-E
    Constant Injection System Electronic
    CKP
    Crankshaft Position
    CL
    Closed Loop
    CLECS
    Closed Loop Emission Control System
    CLFCS
    Closed Loop Fuel Control System
    CM
    Cold Mode
    CMFI
    Central Multi-Port Fuel Injection
    CMP
    Camshaft Position
    CMP-L
    Camshaft Position Low
    CMPO
    Camshaft Position Out
    CMTC
    Compass/Mini-Trip Computer
    CMV
    Coolant Mixer Valve
    CNG
    Compressed Natural Gas
    CO
    Carbon Monoxide
    CO2
    Carbon Dioxide
    COO
    Cruise On / Off Switch
    COP
    Coil On Plug
    CP
    Canister Purge
    CP
    Crankshaft Position
    CP
    Coolant Pressure
    CP3
    Injection Pump Produced By Bosch, Found In Various Duramax And Common Rail Cummins Engines.
    CP4
    Injection Pump Produced By Bosch, Found In Various Modern Common Rail Diesels.
    CPP
    Clutch Pedal Position
    CPS
    Camshaft Position Sensor
    CPU
    Central Processing Unit
    CR
    Common Rail
    CR
    Compression Ratio
    CRFS
    Common Rail Fuel System
    CSF
    Crankshaft Speed Fluctuation
    CSFI
    Central Sequential Fuel Injection
    CSFI
    Cold Start Fuel Igniter
    CSFS
    Cold Start Fuel Solenoid
    CSR
    Cold Start Relay
    CSS
    Cold Start Solenoid
    CTC
    Coolant Temperature Compensation
    CTD
    Cummins Turbo Diesel
    CTM
    Central Timer Module
    CTOX
    Continuous Trap Oxidizer
    CTP
    Closed Throttle Position
    CVVT
    Continuous Variable Valve Timing
    Cyl
    Cylinder
    CYP
    Cylinder Position
    DAB
    Driver Air Bag
    DB
    Decibel
    DB2
    Injection Pump Produced By Stanadyne, Found On Gm And International Idi Diesels.
    DB4
    Injection Pump Produced By Stanadyne, Found On 6.5L Gm Turbodiesels.
    DC
    Direct Current
    DCA
    Diesel Coolant Additive
    DCC
    Diagnostic Connector, Cab
    DCL
    Data Communications Link
    DCU
    Diagnostic Connector, Underhood
    DCU
    Doser Control Unit
    DDE
    Digital Diesel Electronics
    DDEC
    Detroit Diesel Engine Control
    DDI
    Direct Diesel Injection
    DDI
    Digital Direct Fuel Injection
    DDS
    Driveline Disengagement Switch
    DEC
    Diesel Electronic Engine Control System
    DEEC
    Diesel Engine Control
    DEF
    Diesel Exhaust Fluid
    DERM
    Diagnostic Energy Reserve Module
    DF
    Deterioration Factor
    DFI
    Digital Fuel Injection
    DFI
    Direct Fuel Injection
    DI
    Direct Injection
    DI
    Distributor Ignition
    DIC
    Driver Information Center
    DIP
    Diesel Injection Prechamber
    DIS
    Direct Ignition System
    DIS
    Distributorless Ignition System
    DIT
    Direct Injection Turbocharged
    DLC
    Data Link Connector
    DME
    Digital Motor Electronics
    DME
    Dimethyl Ether
    DMIVA
    Distributor Mounted Ignition Vacuum Advance
    DMM
    Digital Multimeter
    DOC
    Diesel Oxidation Catalyst
    DOCIT
    Diesel Oxidation Catalyst Intake Temperature
    DOCOT
    Diesel Oxidation Catalyst Outlet Temperature
    DOHC
    Dual Overhead Camshaft
    DOR
    Direct Ozone Reducing
    DPF
    Diesel Particulate Filter
    DPFDP
    Diesel Particulate Filter Differential Pressure
    DPFE
    Differential Pressure Feedback EGR
    DPFIT
    Diesel Particulate Filter Intake Temperature
    DPFOT
    Diesel Particulate Filter Outlet Temperature
    DPI
    Dual Plug Ignition
    DPR
    Diesel Particle Reduction System
    DRB
    Diagnostic Readout Box
    DRBII
    Diagnostic Readout Box Ii
    DRBIII
    Diagnostic Readout Box Iii
    DRL
    Daytime Running Lamps
    DSAS
    Deceleration Spark Advance System
    DSI
    Down Stream Injection
    DS-I
    Dura Spark I Ignition System
    DS-II
    Dura Spark Ii Ignition System
    DSS
    Downshift Solenoid
    DST
    Detonation Sensitive Timing
    DT
    Diesel Turbocharged
    DTC
    Daignostic Trouble Code
    DTM
    Diagnostic Test Mode
    DTRM
    Diesel Thermo Recirculation Module
    DVOM
    Digital Volt Ohm Meter
    E2PROM
    Electrically Erasable Programmable Read Only Memory
    E85
    "85%" Ethanol ("15%" Gasoline) Fuel
    EAIR
    Electronic Secondary Air Injection
    EAT
    Electronically Controlled Automatic Transaxle Or Transmission
    EBC
    Exhaust Brake Controller
    EBCM
    Electronic Brake Control Module
    EBL
    Electric Back Lite (Rear Window Defroster)
    EBP
    Exhaust Back Pressure
    EBPD
    Exhaust Back Pressure Desired
    EBPR
    Exhaust Back Pressure Regulator
    EBPV
    Exhaust Back Pressure Valve
    EBV
    Exhaust Back Pressure Valve
    EC
    Engine Control
    ECA
    Electronic Control Assembly
    ECB
    Engine Compression Brake
    ECC
    Electronic Calibration Code
    ECCS
    Electronic Concentrated Engine Control System
    ECITS
    Electronic Control Ignition Timing System
    ECL
    Engine Coolant Level
    ECM
    Electronic Control Module
    ECM EIDP
    Ecm External Identification Plate
    ECM GND
    Engine Control Module Ground
    ECM IIDP
    Ecm Internal Identification Plate
    ECM PWR
    Engine Control Module Power
    ECP
    Engine Certification Plate
    ECP
    Engine Coolant Pressure
    ECS
    Emission Control System
    ECS
    Engine Coolant System
    ECSR
    Engine Controlled Shutdown Request
    ECT
    Engine Coolant Temperature
    ECT1
    Engine Coolant Temperature 1
    ECT2
    Engine Coolant Temperature 2
    ECTF
    Cooling Fan Engine Coolant Temperature
    ECU
    Engine Control Unit
    ECU
    Electronic Control Unit
    ECUI
    Electronically Controlled Unit Injection
    EDC
    Electronic Diesel Control
    EDF
    Electro Drive Fan
    EDFI
    Electronic Diesel Fuel Injection
    EDI
    Electronic Controlled Direct Ignition System
    EDIS
    Electronic Distributorless Ignition System
    EDL
    Engine Data Line
    EEC
    Electronic Engine Control
    EEC-I
    Electronic Engine Control I
    EEC-II
    Electronic Engine Control Ii
    EEC-III
    Electronic Engine Control Iii
    EEC-IV
    Electronic Engine Control Iv
    EEC-V
    Electronic Engine Control V
    EEGR
    Electronic Egr Valve
    EEPROM
    Electronically Erasable Programmable Read Only Memory
    EET
    Electronic Egr Transducer
    EFAN
    Engine Fan
    EFANS
    Engine Fan Speed
    EFC
    Electronic Feedback Carburetor
    EFC
    Electronic Fuel Control
    EFC
    Engine Fan Control
    EFE
    Early Fuel Evaporization
    EFI
    Electronic Fuel Injection
    EFP
    Engine Fuel Pressure
    EFRC
    Engine Family Rating Code
    EFS
    Engine Fan Speed
    EFT
    Engine Fuel Temperature
    EG
    Ethylene Glycol
    EGBP
    Exhaust Gas Back Pressure
    EGC
    Electronic Gauge Cluster
    EGDP
    Exhaust Gas Differential Pressure
    EGO
    Exhaust Gas Oxygen Sensor
    EGR
    Exhaust Gas Recirculation
    EGRC
    Exhaust Gas Recirculation Control
    EGRC
    Exhaust Gas Recirculation Cooler
    EGRH
    Exhaust Gas Recirculation High Control
    EGRL
    Exhaust Gas Recirculation Low Control
    EGROT
    Exhaust Gas Recirculation Outlet Temperature Egrp
    EGRP
    Exhaust Gas Recirculation Position
    EGRT
    Exhaust Gas Recirculation Temperature
    EGRTVV
    Exhaust Gas Recirculation Thermal Vacuum Valve
    EGRV
    Egr Vent
    EGT
    Exhaust Gas Temperature (Typically Measured Before The Turbine Inlet Of The Turbocharger)
    EGT1
    Exhaust Gas Temperature 1
    EGT2
    Exhaust Gas Temperature 2
    EGT3
    Exhaust Gas Temperature 3
    EI
    Electronic Ignition
    EIC
    Electronic Instrument Cluster
    EICU
    Electronic Ignition Control Unit
    EIDP
    External Identification Plate
    EIM
    Engine Interface Module
    EITC
    Electronic Ignition Timing Control
    ELB
    Electronic Lean Burn System
    ELC
    Electronic Level Control
    ELCD
    Evaporative Loss Control Device
    ELD
    Electric Load Detector
    ELS
    Exhaust Lambda Sensor
    EM
    Engine Modification
    EMI
    Electromagnetic Interference
    EMP
    Exhaust Manifold Pressure
    EMR
    Electronic Module Retard
    EMT
    Exhaust Manifold Temperature
    EO
    Engine Overspeed
    EOL
    Engine Oil Level
    EOP
    Engine Oil Pressure
    EOT
    Engine Oil Temperature
    EP
    Exhaust Pressure, Exhaust Backpressure
    EPA
    Environmental Protection Agency
    EPC
    Electronic Pressure Control
    EPR
    Exhaust Back Pressure Regulator
    EPROM
    Erasable Programmable Read Only Memory
    EPT
    Egr Pressure Transducer
    ESA
    Electronic Spark Advance
    ESC
    Electronic Spark Control
    ESC
    Electronic System Controller
    ESN
    Engine Serial Number
    ESS
    Engine Speed Sensor
    EST
    Electronic Spark Timing
    EST
    Electronic Service Tool
    ETA
    Engine Timing Actuator
    ETC
    Electronic Temperature Control
    ETC
    Electronic Throttle Control
    ETCS-i
    Electronic Throttle Control System-Intelligent
    ETP
    Engine Throttle Position
    ETV
    Engine Throttle Valve
    ETV-H
    Engine Throttle Valve High
    ETV-L
    Engine Throttle Valve Low
    ETW
    Equivalent Test Weight
    EVAP
    Evaporative Emission Control System
    EVB
    Exhaust Valve Brake
    EVIC
    Electronic Vehicle Information Center
    EVO
    Electronic Variable Orifice
    EVP
    Egr Valve Position
    EVR
    Egr Vacuum Regulator
    EVRT
    Electronically Controlled Turbocharger
    EVSV
    Electronic Vacuum Switching Valve
    EWL
    Engine Warning Lamp
    EWPS
    Engine Warning Protection System
    EZL
    Electronic Ignition System With Variable Characteristics
    F
    Fahrenheit
    FBC
    Feedback Carburetor
    FC
    Fan Control
    FCC
    Fan Control Circuit
    FCV
    Fuel Coolant Valve
    FDCS
    Fuel Demand Command Signal
    FDP
    Fuel Delivery Pressure
    FED
    Federal
    FEEPROM
    Flash Electrically Erasable Programmable Read Only Memory
    FEL
    Family Emissions Limit
    FEPROM
    Flash Erasable Programmable Read Only Memory
    FF
    Flexible Fuel
    FFM
    Fuel Filter Manager; A Fuel Filter Housing Assembly (Water Separator, Fuel Heater, Etc) Manufactured By Stanadyne For Variodiv Applications. One Style In Particular Is Found On 6.5L Gm Diesels.
    FHP
    Friction Horsepower
    FI
    Fuel Injection
    FICM
    Fuel Injection Control Module
    FIDM
    Feedback Injector Drive Module
    FL
    Fuel Lift
    FLI
    Fuel Level Indicator
    FMEM
    Failure Mode Effects Management
    FMI
    Failure Mode Identifier
    FP
    Fuel Pump
    FPC
    Fuel Pump Control
    FPCM
    Fuel Injection Pump Control Module
    FPCV
    Fuel Pressure Control Valve
    FPM
    Feet Per Minute
    FPM
    Fuel Pump Monitor
    FPRC
    Fuel Pressure Regulator Control
    FPS
    Feet Per Second
    FR
    Fillpipe Restrictor
    FRA
    Fuel Rack Actuator
    FRP
    Fuel Rack Position
    FRP
    Fuel Rail Pressure
    FRZF
    Freeze Frame
    FS
    Fuel Shutoff
    FSD
    Fuel System Driver
    FSS
    Flexible Service System
    FT
    Feet
    FT
    Fuel Trim
    FVCV
    Fuel Volume Control Valve
    GAL
    Gallon
    GAL/H
    U.S. Gallons Per Hour
    GAL/MIN
    U.S. Gallons Per Minute
    GCW
    Gross Combined Weight
    GCWR
    Gross Combined Weight Rating
    GFD
    Generic Field Data
    GFP
    Gaseous Fuel Prep
    GMF
    Gas Mass Flow
    GND
    Ground
    GOVERNOR
    Governor
    GP
    Glow Plug
    GPC
    Glow Plug Control
    GPCM
    Glow Plug Control Module
    GPD
    Glow Plug Diagnostic
    GPL
    Glow Plug Wait Lamp
    GPM
    Gallons Per Minute
    GPM
    Grams Per Million
    GPM
    Glow Plug Module
    GPR
    Glow Plug Relay
    GTWR
    Gross Trailer Weight Rating
    GVW
    Gross Vehicle Weight
    GVWR
    Gross Vehicle Weight Rating
    H2O
    Water
    HC
    Hydrocarbons
    HCI
    Hydrocarbon Injection
    HCT
    Hydrocarbon Trap
    HCU
    Hydraulic Control Unit
    HD
    Heavy Duty
    HDC
    Heavy Duty Emission Cycle
    HE
    Hall Effect
    HEDF
    High Electro Drive Fan
    HEGO
    Heated Exhaust Gas Oxygen Sensor
    HEGR
    High Efficiency Exhaust Gas Recirculation
    HEI
    High Energy Ignition
    HEST
    High Exhaust System Temperature
    HEUI
    Hydraulic Electronic Unit Injector
    HFAN
    High Speed Cooling Fan
    HFC
    High Fan Control
    HFCM
    Horizontal Fuel Conditioning Module Hg
    HFM
    Hot Film Air Mass Sensor
    HI
    High Idle
    HIG
    High Idle Governor
    HO
    High Output
    HO2S
    Heated Oxygen Sensor
    hp
    Horsepower
    HPCAC
    High-Pressure Charge Air Cooler
    HPCR
    High Pressure Common Rail
    HPOP
    High Pressure Oil Pump
    HSC
    High Swirl Combustion
    HSIA
    High Speed Inlet Air Control
    HVAC
    Heater Vent Air Conditioning
    HVS
    High Voltage Switch Ignition System
    I/M
    Inspection And Maintenance
    IA
    Intake Air
    IAC
    Idle Air Control
    IACV-AAC
    Idle Air Control Valve-Auxiliary Air Control Valve
    IAH
    Intake Air Heater
    IAHD
    Intake Air Heater Diagnostic
    IAHR
    Intake Air Heater Relay
    IAP
    Injection Actuation Pressure
    IAT
    Intake Air Temperature
    IC
    Ignition Control
    IC
    Integrated Circuit
    IC
    Intercooler (Synonymous With Charge Air Cooler Or Aftercooler)
    ICG1
    Injector Control Group 1
    ICG2
    Injector Control Group 2
    ICM
    Ignition Control Module
    ICP
    Injector Control Pressure
    ICPR
    Injection Control Pressure Regulator
    ICS
    Ignition Control System
    ICTO
    Ignition Coolant Temperature Override
    ID
    Inside Diameter
    IDI
    Indirect Diesel Injection
    IDLE
    Idle
    IDM
    Ignition Diagnostic Monitor
    IDM
    Injector Drive Module
    IDS
    Integrated Diagnostic System
    IFI
    Indirect Fuel Injection
    IFP
    Injection Fuel Pressure
    IGN
    Ignition
    II
    Idle Increment
    IIDD
    Internal Identification Data
    IIDP
    Internal Identification Plate
    ILEV
    Inherently Low Emissions Vehicle
    ILO
    Injector Leak Off
    IMAT
    Intake Manifold Air Temperature
    IMP
    Intake Manifold Pressure
    IMRC
    Intake Manifold Runner Control
    IMRP
    Injector Metering Rail Pressure
    IMT
    Intake Manifold Temperature
    IN
    Inch
    inH2O
    Inch Of Water
    inHg
    Inch Of Mercury
    INJ
    Injector
    IOD
    Ignition Current Off Draw
    IP
    Injection Pump Or Injector Pump
    IPR
    Injection Pressure Regulator
    ISB
    Interact System B (B Series), Name Of The 5.9L, 24 Valve Cummins.
    ISC
    Idle Speed Control
    ISC
    Interstate Cooler
    ISIS
    International® Service Information Solutions
    ISO9141
    International Standards Organization Obdii Communication Mode
    IST
    Idle Shutdown Timer
    ITP
    Internal Transfer Pump
    ITRP
    Injector Timing Rail Pressure
    ITS
    Idle Tracking Switch
    ITV
    Intake Throttle Valve
    ITV-H
    Intake Throttle Valve High Control
    ITV-L
    Intake Throttle Valve Low Control
    ITVP
    Intake Throttle Valve Position
    IV
    Idle Validation
    IVS
    Idle Validation Switch
    J1850PWM
    (Pulse Width Modulated) Sae Established Obd Ii Communication Standard Used By Ford Domestic Cars And Light Trucks. One Of Thrdiv Hardware Layers Defined By Obd Ii
    J1850VPW
    (Variable Pulse Width Modulated) Sae Established Obd Ii Communication Standard Used By Gm Cars And Light Trucks. One Of Thrdiv Hardware Layers Defined By Obd Ii
    J1939-H
    J1939 Data Link High
    J1939-L
    J1939 Data Link Low
    J1962
    Sae Established Standard For The Connector Plug Layout Used For All Obd Ii Scan Tools
    J1978
    Sae Established Standard For Obd Ii Scan Tools
    J1979
    Sae Established Standard For Diagnostic Test Modes
    J2012
    Sae Established Standard Accepted By Epa As The Standard Test Report Language For Emission Tests
    JCT
    Junction (Electrical)
    JTEC
    Jeep Truck Powertrain Control Module System
    KAM
    Keep Alive Memory
    KG
    Kilogram
    KM
    Kilometer
    KM/H
    Kilometers Per Hour
    KM/L
    Kilometers Per Liter
    KOEO
    Key On Engine Off
    KOER
    Key On Engine Running
    KS
    Knock Sensor
    LB/FT
    Pounds Of Force Per Foot
    LB/IN
    Pounds Of Force Per Inch
    LB/S
    Pounds Per Second
    LBM
    Pounds Of Mass
    LCD
    Liquid Crystal Display
    LDP
    Leak Detection Pump
    LDT
    Light-Duty Truck
    LDT1
    Ldt < 6000#Gvwr, 0-3750#Lvw
    LDT2
    Ldt < 6000#Gvwr, 3751-5750#Lvw
    LDT3
    Ldt 6001-8500#Gvwr, 3751-5750#Alvw
    LDT4
    Ldt 6001-8500#Gvwr, 5751-8500#Alvw
    LED
    Light Emitting Diode
    LEV
    Low Emissions Vehicle
    LFAN
    Low Speed Cooling Fan
    LH
    Lefthand
    LNC
    Lean Nox Catalyst
    LNG
    Liquefied Natural Gas
    LOAD
    Calculated Load Value
    LP
    Lift Pump, Referring To The Low Pressure Fuel Pump On A Diesel Engine.
    LPCAC
    Low-Pressure Charge Air Cooler
    LPG
    Liquid Propane Gas
    LPT
    Light Pressure Turbo
    LSD
    Low Sulfur Diesel
    LUS
    Lock-Up Solenoid
    LVW
    Loaded Vehicle Weight
    M
    Meter
    M/CCC
    Modulated Converter Clutch Control
    M/S
    Meters Per Second
    M/T
    Manual Transaxle Or Transmission
    MAF
    Mass Air Flow
    MAG
    Magnetic
    MAP
    Manifold Absolute Pressure
    MAT
    Multiair Technology
    MC
    Mixture Control
    MCC
    Manifold Catalytic Converter
    MCCA
    Message Center Control Assembly
    MCS
    Mixture Control System
    MCU
    Microprocessor Control Unit
    MC-VAF
    Measuring Core Volume Air Flow
    MDFI
    Mechanical Diesel Fuel Injection
    MDP
    Manifold Differential Pressure
    MDV
    Medium-Duty Vehicle
    MDV4
    Mdv 8501 -10000#Gvwr
    MDV5
    Mdv 10001-14000#Gvwr
    MEMCAL
    Memory Calibration Unit
    MEP
    Mean Effective Pressure
    MFG
    Manufacturer
    MFI
    Multiport Fuel Injection
    MGF
    Mass Gas Flow
    MGP
    Manifold Gauge Pressure
    MI
    Mile
    MIC
    Mechanical Instrument Cluster
    MID
    Message Identifier
    MIL
    Malfunction Indicator Light (The "Check Engine Light" On Your Dash)
    MIP
    Mixer Inlet Pressure
    MLP
    Manual Lever Position
    MLUS
    Modulator Lock-Up Solenoid
    MM
    Millimeter
    MPG
    Miles Per Gallon
    MPH
    Miles Per Hour
    MPI
    Multi-Port Injection
    MPR
    Main Power Relay
    MSDS
    Material Safety Data Sheet
    MSG
    Micro Strain Gauge
    MSM
    Multiplex System Module
    MST
    Manifold Surface Temperature
    MTA
    Managed Thermactor Air
    MUI
    Mechanical Unit Injection
    MUTII
    Multi-Use Tool, Second Edition
    MVZ
    Manifold Vacuum Zone
    MY
    Model Year
    N·m
    Newton Meter
    NAC
    Nitrogen Oxides (Nox) Absorbing Catalyst
    NC
    Normally Closed (Electrical)
    NETS
    Navistar Electronics Technical Support
    NGS
    New Generation Star Tester
    NGV
    Natural Gas Vehicle
    NH30C
    Ammonia Oxidation Catalyst
    NH3S
    Ammonia Sensor
    N-m
    Newton Meters, A Metric Measurement Of Torque (Convertible To Ft-Lbs/Lb-Ft)
    NO
    Normally Open (Electrical)
    NOS
    Nox Sensor
    NOx
    Nitrogen Oxides
    NOXS
    NOx Sensor
    NP
    New Process Gear, Popular Manufacturer Of Transmission And Transfer Cases For Various Automakers. Purchased By Chrysler And Latdiv Merged With Gm'S Muncie Division.
    NSC
    Nox Storage Catalyst
    NV
    New Venture Gear, A Joint Venture Between Gm And Chrysler Resulting In The Production Of Various Transmissions And Transfer Casediv Company Was Essentially A Merger Of Gm'S Muncie And Chrysler'S New Process Gear Divisions.
    NVRAM
    Non Volatile Random Access Memory
    O2
    Oxygen
    O2S
    Oxygen Sensor
    O2SH
    Oxygen Sensor Heater
    OAT
    Organic Acid Technology
    OBD
    On Board Diagnostic
    OBDII
    On Board Diagnostics II (New Style Adapter Plug In 1996 & Newer Vehicles)
    OBS
    Old Body Style
    OC
    Oxidation Catalytic Converter
    OCC
    Output Circuit Check
    OCP
    Overcrank Protection
    OD
    Outside Diameter
    ODM
    Output Driver Module
    ODO
    Odometer
    OEM
    Original Equipment Manufacturer
    OHC
    Overhead Cam
    OL
    Open Loop
    OL
    Over Limit
    OPS
    Oil Pressure Sensor
    OPS
    Oil Pressure Switch
    ORH
    Out-Of-Range High
    ORL
    Out-Of-Range Low
    ORVR
    On Board Refueling Vapor Recovery
    OSAC
    Orifice Spark Advance Control
    OSC
    Output State Control
    OSS
    Output Speed Sensor
    OSS
    Output Shaft Speed
    OTIS
    Overhead Travel Information System
    OWL
    Oil/Water Warning Lamp
    P/N
    Part Number
    PAB
    Passenger Air Bag
    PAD
    Passenger Air Bag Disable
    PAG
    Polyalkaline Glycol
    PAIR
    Pulsed Secondary Air Injection
    PC
    Passenger Car
    PC
    Pressure Control
    PCI
    Programmable Communication Interface
    PCM
    Powertrain Control Module
    PCV
    Positive Crankcase Ventilation
    PDB
    Positive Displacement Blower
    PDC
    Power Distribution Center
    PFE
    Pressure Feedback Egr
    PG
    Pulse Generator
    PGM-CARB
    Programmed Carburetor
    PGM-FI
    Programmed Fuel Injection Control System
    PGM-IG
    Programmed Ignition
    PID
    Parameter Identification Descriptions
    PIP
    Profile Ignition Pickup
    PL
    Protect Lamp
    PM
    Personality Module
    PMD
    Pump Mounted Driver
    PMS
    Particulate Matter Sensor
    PNP
    Park/Neutral Position
    ppm
    Parts Per Million
    PRC
    Pressure Regulator Control
    PROM
    Programmable Read Only Memory
    PSI
    Pounds Per Square Inch
    PSIA
    Pounds Per Square Inch Absolute
    PSIG
    Pounds Per Square Inch Gauge
    PSP
    Power Steering Pressure
    PSPS
    Power Steering Pressure Switch
    pt
    Pint
    PTC
    Pending Trouble Code
    PTEC
    Powertrain Electronic Controller Management System
    PTO
    Power Take Off
    PTOT
    Pto Oil Temperature
    PTOX
    Periodic Trap Oxidizer
    PW
    Pulse Width
    PWM
    Pulse Width Modulation
    PWR
    Power (Voltage)
    QT
    Quart
    R
    Key On Engine Running
    RABS
    Rear Anti-Lock Braking System
    RAM
    Random Access Memory
    RAP
    Retained Accessory Power
    RAPP
    Remote Accelerator Pedal Position
    RAS
    Resume / Accelerate Switch (Speed Control) Repto
    RDQS
    Reductant Quality Sensor
    RDS
    Radio Data System
    REDOX
    Reduction Oxidation Catalytic Converter
    REGT
    Recirculated Exhaust Gas Temperature
    REPTO
    Rear Engine Power Takeoff
    REV
    Revolution
    RFI
    Radio Frequency Interference
    RFP
    Rail Fuel Pressure
    RGT
    Rear Gear Train
    RH
    Righthand
    RKE
    Remote Keyless Entry
    ROM
    Read Only Memory
    RON
    Research Octane Number
    RPM
    Revolutions Per Minute
    RPRE
    Remote Preset
    RPS
    Revolutions Per Second
    RSE
    Radiator Shutter Enable
    RSL
    Red Stop Lamp
    RVAR
    Remote Variable
    S/N or SN
    Serial Number
    SAE
    Society Of Automotive Engineers
    SAE J1587 DL
    Sae J1587 Data Link
    SAE J1587 DL–
    Sae J1587 Data Link Negative
    SAE J1587 DL+
    Sae J1587 Data Link Positive
    SAE J1922 DL
    Sae J1922 Data Link
    SAE J1939 DL
    Sae J1939 Data Link
    SAE J1939 DL–
    Sae J1939 Data Link Negative
    SAE J1939 DL+
    Sae J1939 Data Link Positive
    SAE J1939 DL-H
    Sae J1939 Data Link High
    SAE J1939 DL-L
    Sae J1939 Data Link Low
    SAE J1939 SHLD
    Sae J1939 Data Link Shield
    SAW
    Spark Angle Word
    SBEC
    Single Board Engine Control
    SC
    Supercharger
    SCA
    Supplemental Coolant Additive
    SCB
    Supercharger Bypass
    SCC
    Spark Control Computer
    SCCS
    Speed Control Command Switches
    SCPI
    Sequential Central Port Fuel Injection
    SCR
    Selective Catalytic Reduction
    SCRC
    Selective Catalytic Reduction-Urea/Ammonia
    SCRC-NH3
    Selective Catalytic Reduction-Urea/Ammonia
    SCR-N
    Selective Catalytic Reduction-Urea/Ammonia
    SCR-U
    Selective Catalytic Reduction-Urea/Ammonia
    SCS
    Speed Controlled Spark
    SCS
    Speed Control Switch
    SES
    Service Engine Soon Dash Light
    SFI
    Sequential Fuel Injection
    SFP
    Supply Fuel Pressure
    SFT
    Supply Fuel Temperature
    SFTP
    Supplementary Federal Test Procedure
    SHD
    Shield (Electrical)
    SHO
    Super High Output
    SID
    Subsystem Identification Descriptions
    SIG CNDB
    Signal Ground Body
    SIG GND
    Signal Ground
    SIG GNDC
    Signal Ground Chassis
    SIG GNDE
    Signal Ground Engine
    SIL
    Shift Indicator Lamp
    SKIM
    Smart Key Immobilizer Module
    SMEC
    Single Module Engine Control
    SO2
    Sulfur Dioxide
    SOHC
    Single Overhead Camshaft
    SPCS
    Spark Plug Switching Control System
    SPEEDO
    Speedometer
    SPI
    Serial Peripheral Interface
    SPK
    Spark Control
    SPL
    Smoke Puff Limiter
    SPN
    Suspect Parameter Number
    SPOUT
    Spark Output
    SRI
    Service Reminder Indicator
    SRS
    Supplemental Restraint System
    SRT
    System Readiness Test
    SS
    Shift Solenoid
    SSI
    Solid State Ignition
    SST
    Special Service Tool
    ST
    Scan Tool
    STAR
    Self-Test Automatic Readout
    STC
    Spark Timing Control
    STD
    Standard
    STI
    Self-Test Input
    STO
    Self-Test Output
    SULEV
    Super Ultra Low Emissions Vehicle
    SVO
    Special Vehicle Operations
    SVT
    Special Vehicle Team
    SW
    Switch (Electrical)
    SWBAT
    Switch Battery
    SYNC
    Synchronization
    TA
    Timing Actuator
    TAB
    Thermactor Air Bypass Vacuum Solenoid Valve
    TAC
    Tachometer Output Signal
    TAC
    Throttle Actuator Control
    TACH
    Tachometer Output Signal
    TAD
    Thermactor Air Diverter Vacuum Solenoid Valve
    TB
    Throttle Body
    TBD
    To Be Determined
    TBI
    Throttle Body Injection
    TC
    Turbocharger
    TC2CIS
    Turbocharger 2 Compressor Intake Sensor
    TCC
    Torque Converter Clutch
    TCCP
    Torque Converter Clutch Pressure
    TCM
    Transmission Control Module
    TCS
    Transmission Controlled Spark
    TCWC
    Turbocharger Wastegate Control
    TDC
    Top Dead Center
    TDE
    Transmission Driving Engaged
    TFI-I
    Thick Film I Ignition System
    TFI-IV
    Thick Film Iv Ignition System
    TFT
    Transmission Fluid Temperature
    TI
    Transistor Ignition System
    TLEV
    Transitional Low Emission Vehicle
    TOP
    Transmission Oil Pressure
    TOSS
    Transmission Output Shaft Speed
    TOT
    Transmission Oil Temperature
    TP
    Throttle Position
    TPI
    Tuned Port Injection
    TPOUT
    Throttle Position Output
    TPS
    Throttle Position Sensor
    TR
    Transmission Range
    TRS
    Transmission Regulated Spark
    TSB
    Technical Service Bulletin
    TSS
    Transmission Speed Sensor
    TSS
    Turbine Speed Sensor
    TSS
    Turbine Shaft Speed
    TTS
    Transaxle Temperature Switch
    TTS
    Transmission Tailshaft Speed
    TV
    Throttle Valve
    TVP
    Throttle Valve Potentiometer
    TVS
    Thermal Vacuum Switch
    TVV
    Thermal Vacuum Valve
    TWC
    Three Way Catalytic Converter
    TWC+OC
    Three Way + Oxidation Catalytic Converter
    UCC
    Underbody Catalytic Converter
    UIC
    Universal Integrated Circuit Ignition
    UL
    Useful Life
    ULEV
    Ultra Low Emissions Vehicle
    ULSD
    Ultra Low Sulfur Diesel
    UVC
    Under Valve Cover
    V
    Volt
    VAC
    Vacuum
    VAF
    Vane Air Flow
    VAF
    Volume Air Flow
    VANOS
    Double Variable Camshaft Control
    VAT
    Vane Air Temperature
    VBAT
    Battery Voltage
    VC
    Volume Control
    VCM
    Vehicle Control Module
    VCRM
    Variable Control Relay Module
    VDC
    Volts Of Direct Current
    VDV
    Vacuum Delay Valve
    VEPS
    Vehicle Electronic Programming System
    VFD
    Vacuum Fluorescent Display
    VGT
    Variable Geometry Turbocharger
    VIC
    Vehicle Information Center
    VICS
    Variable Inertia Charging System
    VIGN
    Ignition Voltage
    VIN
    Vehicle Identification Number
    VIT
    Vehicle Interface Tool
    VLS
    Vehicle Limiting Speed
    VLSG
    Vehicle Limiting Speed Governor
    VNT
    Variable Nozzle Turbocharger
    VOP
    Valve Opening Pressure
    VP-20
    Bosch Vp-20 Diesel Engine Control System
    VPM
    Vehicle Personality Module
    VR
    Voltage Regulator
    VRE
    Vehicle Retarder Enable
    VREF
    Voltage Reference
    VREF1
    Reference Voltage Engine
    VREF2
    Reference Voltage Chassis
    VREF3
    Reference Voltage Chassis
    VREF4
    Reference Voltage Aftertreatment
    VRV
    Vacuum Regulator Valve
    VS
    Variable Speed
    VSG
    Variable Speed Governor
    VSO
    Vehicle Speed Output
    VSS
    Vehicle Speed Sensor
    VSS_CAL
    Vehicle Speed Output
    VSS-H
    Vehicle Speed Sensor High
    VSS-L
    Vehicle Speed Sensor Low
    VTEC
    Variable Valve Timing & Valve Lift Electronic Control
    VTSS
    Vehicle Theft Security System
    VVT
    Variable Valve Timing
    VVTi
    Variable Valve Timing With Intelligence
    VVTL-i
    Variable Valve Timing & Lift Intelligence
    WAC
    Wide Open Throttle A/C Cutoff
    WCC
    Warm-Up Catalytic Converter
    WCC
    Wastegate Control Circuit
    WEL
    Warn Engine Lamp
    WIF
    Water In Fuel
    WIFL
    Water In Fuel Lamp
    WOT
    Wide Open Throttle
    WOTPS
    Wide Open Throttle Position Switch
    WR-H02S
    Wide Range/Linear/Heated Air-Fuel Ratio Sensor
    WSL
    Wait To Start Lamp
    WSS
    Wheel Speed Sensor
    WTEC
    World Transmission Electronically Controlled Automatic Transmissions (Allison)
    WTSL
    Wait To Start Lamp
    WU
    Warm-Up Catalyst
    WU-OC
    Warm Up Oxidation Catalytic Converter
    WU-TWC
    Warm Up Three Way Catalytic Converter
    X
    Equipped
    XCS
    Transfercase
    XMSN
    Transmission
    ZEV
    Zero Emissions Vehicle
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