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Thread: Abreviations/acronyms for newbies

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    guru of all things diesel Canadiandiesel's Avatar

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    Abreviations/acronyms for newbies

    here is a list that i have compiled of terms that may or may not be used in most forums that i have been on relating to vehicles, specifically diesels


    2WD- Two Wheel Drive

    4WD- Four Wheel Drive

    ABS- Anti-lock Brake System: Modulates braking pressure to control wheel lockup

    ACM- Airbag Controller Module: monitors sensors and deploys airbag(s) in the event of an accident

    AFC- Air Fuel Control: used on 94 - 98 diesels to control fuel rate at low boost

    APPS- Accelerator Pedal Position Sensor: used on ISB diesel for electronic throttle control

    ASD- Auto Shut Down: relay control system used to shut down engine

    BDC- Bottom dead center - the lowest position of a piston in the cylinder occurs when the crank pin is at bottom dead center

    BE- model designation for the Quad Cab Ram pickup

    BFSC- Brake Specific Fuel Consumption - pounds of diesel fuel consumed to produce 1 HP for 1 hour

    BHAF- Big Honkin' air filter- oversized filter used by the diesel gang

    BR- model designation for standard cab Ram pickup (and maybe the CC Pickup) more below

    CAB- Controller Anti-lock Brake:

    CARB- California Air Rescouces Board: environmental regulatory agency in CA

    CCD- Chrysler Collision Detection: data bus system used by the airbag and the anti-lock brake systems

    CHMSL- Center High Mounted Stop Light: 3rd brake light at top of truck cab

    CPS- Crank position sensor : detects position and speed of engine crankshaft

    CMP- Camshaft position sensor: detects position of camshaft

    CP3- Common Rail Injection Pump, 03 and up

    CPL- Control Part List: listing of engine parts and timing specifications for a Cummins engine (Ram CPL numbers)

    CTD- Cummins turbo diesel - used by many on mail lists and message boards

    CTM- Central Timer Module: controls RKE, chime, courtesy lamps, Speed sensitive Intermittent wipers, enhanced accident response, VTSS

    DAB- Driver Air Bag module: airbag and firing system mounted in the steering wheel center

    DC DC or D/C = DaimlerChrysler - used on mail lists and message boards

    DD1 DD1, DD2, DD3 = Diesel Dynamics Stage 1 (2 or 3) injectors

    DEE- Order code for the NV5600 6 speed manual transmission

    DLC- Data Link Connector: used to interface diagnostic equipment with vehicle electronics

    DRB- scan tool used to obtain diagnostic trouble codes (DTC) from controller modules

    DRB- III new generation scan tool used to obtain diagnostic trouble codes (DTC)

    DRW- Dual Rear Wheel

    DTC- Diagnostic Trouble Code: Fault code set by control module when sensor data is not as expected

    DTT- Diesel Transmission Technologies - aftermarket auto trans upgrade specialist

    EBC- four wheel anti-lock brake system

    ECM- Engine Control Module: microprocessor based module that controls various engine functions

    ECT- Engine Coolant Temperature Sensor

    EEPROM- Electrically Erasable Programmable Read Only Memory: controller reprogrammable memory

    EGR- Exhaust Gas Recirculation: used to reduce combustion temperature and pressure to control Oxides of Nitrogen emissions

    EGT- Exhaust Gas Temperature: Important measurement for hard working diesel engines

    EMCC- Electronically Modulated Converter Clutch: used for torque Converter lockup control in the automatic transmission

    ETC- Order code for diesel engine

    ETH- 2001 Order code for the High Output diesel engine

    ETH/DEE- Slang for the 2001 HO diesel with the NV5600 six speed

    EVA- Electronic Vibration Analyzer - used to diagnose chassis, engine, and drivetrain vibrations

    EVR- Electronic voltage regulator: circuitry in the PCM which controls battery charging and alternator functions

    FASS- Aftermarket fuel pump

    FCA- Fuel Control Actuator: 03+ Common Rail engines

    FP- Fuel Pressure

    FPCM- Fuel injection Pump Control Module: controls injection pump on 98+ diesel engines

    GAWR- Gross Axle Weight Rating: maximum safe load capacity of an axle measured at the ground.

    GCW- Gross Combined Weight: total weight of equipped truck, payload, trailer, water, and equipment.

    GCWR- Gross Combined Weight Rating: maximum allowable GCW

    GVW- Gross Vehicle Weight: total curb weight of the truck and payload.

    GVWR- Gross Vehicle Weight Rating: maximum allowable GVW

    HCU- Hydraulic Control Unit: modulates the brake pressure for ABS

    HX35- Holset turbocharger used for most 94+ diesel Rams.

    HX40- Holset turbocharger intended for C engines, but used by some performance enthusiasts on the Ram's B engine

    HY35- Holset turbocharger used on 2000+ diesel Rams with the automatic transmission

    IAT- Intake Air Temperature Sensor

    IAC- Idle Air Control valve: used for emissions control on gasoline engines

    IP- Instrument Panel or Injection pump

    ISB- Interact System B: Cummins designation for the 24 Valve "B" series diesel introduced to the 1998 Ram

    JTEC- Jeep, Truck Engine Control: Combined engine and transmission control module

    KDP- Killer dowel pin inside the timing gear case on 94-98 12 valve diesels. If this pin falls out of its blind hole, the repair is expensive. The two preventative repairs are the Washer Tab and Drill Jig/Bolt

    LDP- Leak Detection Pump: used in the 4 wheel ABS valve assembly

    LED- Light Emitting Diode: semiconductor lamp used for displays and warning lamps

    LP- Lift Pump

    LSD- limited slip differential

    LWB- long wheelbase (or LB, for long box or long bed)

    MAP- Maximum Absolute Pressure sensor: used for emission control

    MDS- Mopar Diagnostic System: diagnostic computer system for service departments

    MIC- Mechanical Instrument Cluster: Instrument cluster controller and display system

    MIL- Malfunction Indicator Light: used by engine control system to indicate a problem to the driver

    MTV- Manifold Tuning Valve: used to vary the manifold runners for engine performance and emission control

    O2S- Oxygen Sensor: measures oxygen content of exhaust stream. Used to modify air to fuel ratio for emission control

    OBD- On Board Diagnostics: Ram engine and powertrain self diagnostic system

    OBD II- On Board Diagnostics II: enhanced diagnostic system to meet 1997 EPA requirements

    P7100- Fuel injection pump used with 1994 - 1998 Ram 12 valve diesel engines

    PAB- Passenger Air Bag module: airbag and firing mechanism on the passenger side

    PADS- Passenger Airbag Disarm Switch: Override switch to disable

    PAB- when children are riding in front seat

    PCI- Programmable Communications Interface

    PCM- Powertrain Control Module: microprocessor based module that controls engine and drivetrain functions

    PCV- Positive Crankcase Ventilation: vacuum system used to control crankcase (blowby) emissions

    PDC- Power Distribution Center: Fuse and relay power distribution center located under the hood.

    PEP- Peripheral Expansion Port

    psi- Pounds per Square Inch: pressure measurement

    RAM- Random Access Memory: read and write memory used by controllers for data storage

    RKE- Remote Keyless Entry: remote operated door lock system

    RPM- Revolutions Per Minute: the speed of a turning shaft or rotor

    ROM- Read Only Memory: controller "hard" memory that is permanently written - EEPROM may be reprogrammed with appropriate diagnostic tools

    RWAL- Rear Wheel Anti Lock brakes:

    SBEC- Single Board Engine Controller

    SCI- Serial Communications Interface: Used by the PCM for diagnostics and for communication with other controller modules

    SCTM- Seatbelt Timer Control Module: inertia latching seatbelt controller built into Quad Cab Models

    SKIM- Sentry Key Imobilizer Module: disables engine start until Secret Key is entered using DRB scan tool !!! Required when a new PCM is installed in a vehicle

    SRW- Single Rear Wheel

    SWB- (or SB, for short box or short bed)

    T3/T4/T6- different size turbocharger flanges

    TCC- Torque Converter Clutch

    TCM- Transmission Control Module: May not be used on Ram trucks

    TDC- Top Dead Center: the highest position of a piston in the cylinder occurs when the crank pin is at top dead center

    TDR- Turbo Diesel Register - club for Ram diesel owners - with a website, magazine, and rallys

    TPS- Throttle Position Sensor

    TRS- Transmission Range Sensor

    TSB- Technical Service Bulletin: repair and technical information bulletins to assist service departments

    TST- Diesel engine power enhancement company run by Mark Chapple

    VB- Valve body - auto trans

    VE- Bosch Distributor type injection pump used on 89-93 Ram diesel engines

    VP-44- Bosch electronic fuel injection pump used on 1998+ Ram diesel engines

    VIN- Vehicle Identification Number: unique serial number assigned to each vehicle

    VSS- Vehicle Speed Sensor/Signal

    VTSS-Vehicle Theft Security System: anti theft system with engine disable, alarm, and door lock features

    WIF- Water In Fuel sensor: detection system for water in fuel filter on 1994+ diesel engines

    WOT- Wide Open Throttle: maximum throttle position


  2. Top Of Page | #2
    WE WILL STAND! IGOTACUMMINS's Avatar

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    Great information for newbies.

    "The grass is greener where you water it"


  3. Likes cumminsbadgirl, SKIBBEE4thGEN liked this post

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