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