For 1990-2009 cars only
Important: The following steps must be completed before using the symptom tables.
- Perform the Diagnostic System Check - Vehicle in Vehicle DTC Information before using the Symptom Tables in order to verify that all of the following are true:
- Review the system operation in order to familiarize yourself with the system functions. Refer to the following:
| • | There are no DTCs set. |
| • | The control modules can communicate via the serial data link. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the Instrument Cluster or Audible Warning Systems. Refer to Checking Aftermarket Accessories in Wiring Systems. |
| • | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
| • | Inspect for proper fluid level. |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
Gages and Odometer
Indicators
| • | ABS Indicator Always On in Antilock Brake System |
| • | ABS Indicator Inoperative in Antilock Brake System |
| • | Brake Warning Indicator Always On in Hydraulic Brakes |
| • | Brake Warning Indicator Inoperative in Hydraulic Brakes |
| • | Charge Indicator Always On in Engine Electrical |
| • | Charge Indicator Inoperative in Engine Electrical |
| • | Cruise Control Indicator Always On in Cruise Control |
| • | Cruise Control Indicator Inoperative in Cruise Control |
| • | Engine Coolant Temperature Indicator Always On in Engine Cooling |
| • | Engine Overheated Indicator Always On in Engine Cooling |
| • | High Beam Indicator Always On in Lighting Systems |
| • | High Beam Indicator Inoperative in Lighting Systems |
| • | Low Engine Coolant Indicator Always On in Engine Cooling |
| • | Low Washer Fluid Indicator Malfunction in Wipers/Washer Systems |
| • | Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 4.3L |
| • | Malfunction Indicator Lamp (MIL) Always On in Engine Controls - 4.3L |
| • | Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 4.8L, 5.3L, and 6.0L |
| • | Malfunction Indicator Lamp (MIL) Always On in Engine Controls - 4.8L, 5.3L, and 6.0L |
| • | Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 6.6L (LLY) |
| • | Malfunction Indicator Lamp (MIL) Always On in Engine Controls - 6.6L (LLY) |
| • | Security Indicator Always On or Flashing in Theft Deterrent |
| • | Security Indicator Inoperative in Theft Deterrent |
| • | Four-Wheel Drive Indicator Always On in Transfer Case - NVG 261 - NP2 |
| • | Four-Wheel Drive Indicator Inoperative in Transfer Case - NVG 261 - NP2 |
| • | Service Indicator Always On in Transfer Case - NVG 246 - NP8 |
| • | Service Indicator Inoperative in Transfer Case - NVG 246 - NP8 |
| • | Service Indicator Always On in Transfer Case - NVG 263 - NP1 |
| • | Service Indicator Inoperative in Transfer Case - NVG 263 - NP1 |
| • | Tow/Haul Switch/Indicator Always On or Inoperative in Automatic Transmission - 4L60-E |
| • | Tow/Haul Switch/Indicator Always On or Inoperative in Automatic Transmission - 4L80-E |
| • | Traction Off Indicator Always On in Antilock Brake System |
| • | Traction Off Indicator Inoperative in Antilock Brake System |
| • | Turn Signal Lamps and/or Indicators Always On or Flashing in Lighting Systems |
| • | Turn Signal Lamps and/or Indicators Inoperative in Lighting Systems |
Instrument Cluster Dimming
| • | Interior Backlighting Inoperative in Lighting Systems |
| • | Interior Backlighting Does Not Dim in Lighting Systems |
Driver Information Center (DIC)
Driver Information Center (DIC) Switch Inoperative
Audible Warnings
