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Abbreviations used by by mail list members, service manuals, etc for the Dodge Ram
Dodge Ram Alphabet Soup
Glossary of terms and abbreviations used for Ram trucks and components 
For standard internet abbreviations, see This Page
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Just what do all of those abbreviations and terms mean?
 Think I need a bigger soup pot!  :-)
2WD Two Wheel Drive
4WD Four Wheel Drive
AAMOF As A Matter Of Fact - used by many on mail lists and message boards
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
BOMB Better off modified baby! - used by the diesel gang who hop up thier engines
BR model designation for standard cab Ram pickup (and maybe the CC Pickup) more below
BTW By The Way - used on mail lists and message boards
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
CKP Crank Position Sensor: detects position and speed of engine crankshaft
CMP Camshaft position sensor: detects position of camshaft
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, 2, 3 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)
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 2  RWAL brake system
EBC 325 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 standard diesel engine
ETH 2001-2002 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
FP Fuel Pressure - abbreviation used on message boards
FPCM Fuel injection Pump Control Module: controls injection pump on 98+ diesel engines
FWIW For What It's Worth - used by many on mail lists and message boards
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
HD Heavy Duty
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
IMHO In My Honest Opinion - used on mail lists and message boards
IMO In My Opinion - used on mail lists and message boards
IP Instrument Panel
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
K&N Aftermarket filter and intake system manufacturer
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
LD Light Duty
LDP Leak Detection Pump: used in the 4 wheel ABS valve assembly
LED Light Emitting Diode: semiconductor lamp used for displays and warning lamps
LOL Laughing Out Loud - By The Way - used on mail lists and message boards
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(2) 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
MPI Multi Port Injection: Each cylinder has it's own fuel injector in the intake port.
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
OTOH On The Other Hand - used by many on mail lists and message boards
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
ROFL Rolling On Floor Laughing - used on mail lists and message boards
ROFLMAO Rolling On Floor Laughing My A$$ Off - used on mail lists and message boards
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
SWB (or SB, for short box or short bed)
SWMBO She Who Must Be Obeyed - used by men on mail lists and message boards to refer to their wife or girlfriend
TBI Throttle Body Injector: Electronic fuel injector located in normal place of a carburator.
TC Torque Converter
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
TIA Thanks In Advance - used by many on mail lists and message boards
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
TTT To The Top - - used on message boards to bring a thread to the top
VB Valve body - auto trans
VE Bosch Distributor type injection pump used on 89-93 Ram diesel engines
VP44 Bosch electronic fuel injection pump used on 1998+ Ram diesel engines
VIN Vehicle Identification Number: unique serial number assigned to each vehicle
YMMV From the Your Mileage May Vary disclaimer- used on mail lists and message boards to indicate that your experience may be different
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
Cab and Chassis Commercial chassis complete with cab, engine and running gear, equipped for road use, but without a body or platform.
Cetane Ignition quality measure for diesel fuel - see the diesel fuel page for more details
Compression Ratio A ratio of the volume above a piston at TDC divided by the volume above the piston at BDC.
Crew Cab An extended cab long enough to accomodate a full size pickup door on each side to the rear of the standard doors. This 4 door pickup is a beast to park.
Curb Weight The weight of an empty truck (without passengers) including fuel, coolant, oil, and all standard or optional items attached to the truck.
Payload Weight of the cargo carried by a truck including the driver, passengers, cargo, and traile tongue ot pin weight.
Pitch line The point where the center line of a pinion meshes into a ring gear 
Quad Cab/Club Cab An extension to the pickup cab that provides additional seating and storage. Also called extended cab, Xtra cab, Supercab, Kingcab.

Ram BR/BE designations

From Bob Bergevin:
DC uses two letter codes to identify all the vehicles in the lines it builds.  I don't have the complete list here, but somewhere in Daves TSB collection there is a cover sheet that lists them all.  The full size (1500, 2500, 3500) series of Rams were/are designated BR.  This included the club cab as it evolved from the original standard cab.  As the 4 door (quad) was introduced a few years ago, it received the BE designation to separate it from the BR line.  Shortly after the introduction of the quad BE, the club cab went to the land of the dodo and there were the standard and quad left.  Since they were built on the same frames (more or less) and in the same equipped versions (more or less) with only wheelbase, weight variations, etc, etc differences, they are listed as BR/BE information. Likewise the service manuals share the designations while the differences are treated in different sections of the manual.  To my knowledge the fact that the truck is a 4X4 or 4X2 does not change the designation at all, only the body style changes the designation, but they are all in the same book-that must be why it costs almost $100.00! Today if you order a standard cab you get a BR, if you order a quad you get a BE and if you order a club cab you get ??????!

Last Update:  February 13, 2003