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
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