2007 RAM CHASSIS CAB service indicator

ONBOARD DIAGNOSTIC SYSTEM (OBD II)
Vehicles equipped with California emissions controls
have a sophisticated onboard diagnostic system called
OBDII. This system monitors the performance of the
emissions, engine, and automatic transmission control
systems. When these systems are operating properly,
your vehicle will provide excellent performance and fuel
economy, as well as engine emissions well within current
government regulations.
If any of these systems require service, the OBD II system
will turn on the “Malfunction Indicator Light.” It will
also store diagnostic codes and other information to
assist your service technician in making repairs. Al-
though your vehicle will usually be driveable and not
need towing, see your dealer for service as soon as
possible. CAUTION!Prolonged driving with the “Malfunction Indicator
Light” on could cause further damage to the emis-
sion control system. It could also affect fuel economy
and driveability. The vehicle must be serviced before
any emissions tests can be performed.
If the “Malfunction Indicator Light” is flashing,
severe catalytic converter damage and power loss
will soon occur. Immediate service is required.
Loose Fuel Filler Cap Message
If the vehicles diagnostic system determines that the fuel
filler cap in loose, improperly installed, or damaged, a
GASCAP message will be displayed in the instrument
cluster. Tighten the gas cap until a “clicking” sound is
heard. This is an indication that the gas cap is properly
tightened. Press the odometer reset button to turn the394 MAINTAINING YOUR VEHICLE

message off. If the problem persists, the message will
appear the next time the vehicle is started. This might
indicate a damaged cap. If the problem is detected twice
in a row, the system will turn on the Malfunction
Indicator Light (MIL). Resolving the problem will turn
the MIL light off.
REPLACEMENT PARTS
Use of genuine Mopar  parts for normal/scheduled
maintenance and repairs is highly recommended to in-
sure the designed performance. Damage or failures
caused by the use of non-Mopar parts for maintenance
and repairs will not be covered by the manufacturer’s
warranty. ENGINE DATA PLATE
Use the information from the engine data plate when
discussing service or sourcing parts for your engine. The
engine data plate is located on the intake side of the
breather cover.
DEALER SERVICE
Your dealer has the qualified service personnel, special
tools and equipment to perform all service operations in
an expert manner. Service manuals are available which
include detailed service information for your vehicle.
Refer to these manuals before attempting any procedure
yourself.
NOTE: Intentional tampering with emissions control
systems can result in civil penalties being assessed
against you. MAINTAINING YOUR VEHICLE 395
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Draining Fuel/Water Separator Filter (Diesel
Engines)
CAUTION!Do not drain the fuel/water separator filter when the
engine is running. CAUTION!Do not prefill the fuel filter when installing a new
fuel filter. There is a possibility debris could be
introduced into the fuel filter during this action. It is
best to install the filter dry and allow the in-tank lift
pump to prime the fuel system.
NOTE: Care should be taken in disposing of used fluids
from your vehicle. Used fluids, indiscriminately dis-
carded, can present a problem to the environment. Con-
tact your local dealer, service station, or government
agency for advice on recycling programs and for where
used fluids and filters can be properly disposed of in
your area.
Drain a small amount from the fuel/water separator
filter monthly or when the WATER IN FUEL indicator
lamp is on. Turn the drain valve, located on the bottom of410 MAINTAINING YOUR VEHICLE

Catalyst Full Message ..................... 415
Catalytic Converter ...................... 413
CD (Compact Disc) Player ............ 182,190,204
Cellular Phone .......................... 87
Center Lap Belts ......................... 45
Center Seat Storage Compartment ......... 155,157
Certification Label ....................... 338
Charge Air Cooler ....................... 432
Chart, Tire Sizing ........................ 306
Check Engine Light (Malfunction Indicator Light) . 176
Child Restraint ........................ 59,60
Child Restraint Tether Anchors ............. 64,67
Child Seat ............................ 60,66
Cigar Lighter ........................... 151
Cleaning
Wheels ............................. 454
Climate Control ......................... 230
Clock ..................... 180,185,192,205,219
Clutch Linkage Maintenance ................ 436 Compact Disc (CD) Maintenance ............. 229
Compact Spare Tire ...................... 318
Compass .............................. 138
Compass Calibration .................. 138,148
Compass Variance .................... 140,148
Computer, Trip/Travel .................... 134
Console, Overhead ....................... 141
Contract, Service ........................ 506
Coolant Pressure Cap (Radiator Cap) .......... 429
Cooling System ......................... 426
Adding Coolant (Antifreeze) .............. 429
Coolant Capacity ...................... 468
Coolant Level ................... 426,427,430
Disposal of Used Coolant ................ 430
Drain, Flush, and Refill .................. 427
Inspection ........................... 430
Points to Remember .................... 431
Pressure Cap ......................... 429
Radiator Cap ......................... 429516 INDEX

Brake Warning ........................ 177
Bulb Replacement ................... 461,462
Cap Top Clearance ..................... 466
Check Engine (Malfunction Indicator) ........ 176
Cruise .............................. 180
Daytime Running ...................... 124
Dome .............................. 141
Fog .......................... 125,178,465
Four-Wheel Drive Indicator ............... 287
Hazard Warning Flasher ................. 370
Headlights ........................... 124
High Beam ........................ 127,173
High Beam Indicator .................... 173
High Beam/Low Beam Select ............. 127
Illuminated Entry ....................... 19
Instrument Cluster ..................... 172
Intensity Control ....................... 122
Interior ............................. 122
Lights On Reminder .................... 125 Passing ............................. 126
Reading ............................. 141
Seat Belt Reminder ..................... 173
Service ........................... 461,462
Transfer Case ......................... 287
Transmission Warning ................... 179
Turn Signal ..................... 125,173,462
Warning (Instrument Cluster Description) ..... 172
Limited-Slip Differential ................ 295,437
Loading Vehicle ......................... 338
Tires ............................... 310
Locks ................................. 26
Child Protection ........................ 30
Door ................................ 26
Keys ................................ 12
Power Door ........................... 27
Steering Wheel ......................... 15
Lower Anchors and Tether for CHildren (LATCH) . 64
Lubrication, Body ....................... 423522 INDEX

Snow Tires ........................... 324
Spinning ............................ 319
Tread Wear Indicators ................... 320
Wheel Mounting ....................... 372
Wheel Nut Torque ..................... 376
Tongue Weight/Trailer Weight .............. 346
Torque Converter Clutch ................ 272,278
Tow Hooks, Emergency ................... 386
Towing ............................... 341
Disabled Vehicle ....................... 387
Guide .............................. 346
Recreational .......................... 360
Weight .............................. 346
Traction .............................. 298
Traction Control ......................... 437
TrailerTowing .......................... 341
Cooling System Tips .................... 354
Hitches ............................. 345
Minimum Requirements ................. 347 Mirrors ........................... 86,354
Trailer and Tongue Weight ................ 346
Wiring .............................. 351
TrailerTowingGuide ..................... 346
TrailerWeight .......................... 346
Transaxle
Automatic ............................ 12
Manual .............................. 14
Transfer Case
Electronically Shifted .................... 288
Fluid ............................... 471
Transmission
Automatic ................... 267,273,438,441
Fluid ............................... 471
Maintenance ....................... 438,441
Manual ..................... 248,252,279,438
Shifting ............................. 266
Transmitter Battery Service (Remote Keyless Entry) . 24
Tread Wear Indicators .................... 320 INDEX 529
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