A Symptom Diagnosis

IMPORTANT: The following steps must be completed before using the symptom tables.

1. Perform the Diagnostic System Check - Instrument Cluster, Diagnostic System Check - Driver Information Systems or to Diagnostic System Check Audible Warnings before using the Symptom Tables in order to verify that all of the following are true:
^ There are no DTCs set. Diagnostic System Check - Instrument Panel Cluster Diagnostic System Check - Driver Information Systems Diagnostic System Check - Audible Warnings
^ The control modules can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following:
^ Instrument Panel Cluster (IPC) Description and Operation
^ Indicator/Warning Message Description and Operation
^ Driver Information Center (DIC) Description and Operation
^ Audible Warnings Description and Operation

Visual/physical inspection
^ Inspect for aftermarket devices which could affect the operation of the instrument panel cluster or audible warnings system. Refer to Checking Aftermarket Accessories in Diagnostic Aids.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
^ Inspect for the proper fluid levels.

Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Diagnostic Aids.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

Gages and Odometer
^ Engine Coolant Temperature Gage Inaccurate or Inoperative
^ Engine Oil Pressure Gage Inaccurate or Inoperative
^ Fuel Gage Inaccurate or Inoperative
^ Odometer Trip/Reset Switch Inoperative
^ Speedometer and/or Odometer Inaccurate or Inoperative
^ Tachometer Inaccurate or Inoperative
^ Volt Gage Inaccurate or Inoperative

Indicators
^ ABS Indicator Always On in Antilock Brake System Symptom Related Diagnostic Procedures
^ ABS Indicator Inoperative in Antilock Brake System Symptom Related Diagnostic Procedures
^ Air Bag Indicator Circuit Malfunction in Restraint Systems Symptom Related Diagnostic Procedures
^ Brake Warning Indicator Always On in Hydraulic Brakes Symptom Related Diagnostic Procedures
^ Brake Warning Indicator Inoperative in Hydraulic Brakes Symptom Related Diagnostic Procedures
^ Change Engine Oil Indicator Always On
^ Change Engine Oil Indicator Inoperative
^ Charge Indicator Always On in Starting and Charging Symptom Related Diagnostic Procedures
^ Charge Indicator Inoperative in Starting and Charging Symptom Related Diagnostic Procedures
^ Cruise Control Indicator Always On in Cruise Control Testing and Inspection
^ Cruise Control Indicator Inoperative in Cruise Control Testing and Inspection
^ Door Ajar Indicator Malfunction in Doors Testing and Inspection
^ Engine Coolant Temperature Indicator Always On in Cooling System Symptom Related Diagnostic Procedures
^ Engine Oil Pressure Indicator Always On
^ High Beam Indicator Inoperative in Lighting System Testing and Inspection
^ Low Engine Coolant Indicator Always On in Cooling System Symptom Related Diagnostic Procedures
^ Low Engine Oil Level Indicator Always On
^ Low Washer Fluid Indicator Malfunction in Wipers/Washer Systems
^ Malfunction Indicator Lamp (MIL) Always On in Computers and Controls Systems - 3.4L Symptom Related Diagnostic Procedures
^ Malfunction Indicator Lamp (MIL) Inoperative in Computers and Controls Systems - 3.4L Symptom Related Diagnostic Procedures
^ Malfunction Indicator Lamp (MIL) Always On in Computers and Controls Systems - 3.8L Symptom Related Diagnostic Procedures
^ Malfunction Indicator Lamp (MIL) Inoperative in Computers and Controls Systems - 3.8L Symptom Related Diagnostic Procedures
^ Seat Belt Indicator Circuit Malfunction in Seat Belts Symptom Related Diagnostic Procedures
^ Security Indicator Inoperative in Theft Deterrent Testing and Inspection
^ Traction Off Indicator Always On in Antilock Brake System Symptom Related Diagnostic Procedures
^ Traction Off Indicator Inoperative in Antilock Brake System Symptom Related Diagnostic Procedures
^ Trunk Ajar Indicator Always On in Trunk/Liftgate Trunk Ajar Indicator Always On
^ Trunk Ajar Indicator Inoperative in Trunk/Liftgate Trunk Ajar Indicator Inoperative
^ Turn Signal Lamps and/or Indicators Always On or Flashing in Lighting Systems
^ Turn Signal Lamps and/or Indicators Inoperative in Lighting Systems Testing and Inspection

Driver Information Center (DIC)
^ Driver Information Center (DIC) Compass Inaccurate or CAL Displayed
^ Driver Information Center (DIC) Temperature Display Inaccurate or Inoperative
^ Driver Information Center (DIC) Switch(es) Inoperative

IPC Dimming
^ Interior Backlighting Does Not Dim in Lighting Systems Testing and Inspection
^ Interior Backlighting Inoperative in Lighting Systems Testing and Inspection

Audible Warnings
^ Chime Always On
^ Chime Inoperative