Important:
- Perform A Diagnostic System Check - Instrument Cluster before
using the symptom tables in order to verify that all of the following are
true:
| • | The control module(s) can communicate via the class 2 serial
data link. |
- Review the system operation in order to familiarize yourself with
the system functions. Refer to Instrument Cluster Circuit Description.
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation
of the instrument cluster or audible warnings system. 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. |
| • | For any indicator relating to fluid level, perform a visual inspection
of the fluid level before beginning diagnosis. |
| • | Verify that the indicators work properly during the bulb check. |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent
conditions. Refer to Testing for Intermittent and Poor Connections in Wiring
Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order
to diagnose a symptom that does not set a DTC:
| • | Instrument Cluster Inoperative |
| • | Engine Coolant Temperature Gauge Inaccurate or Inoperative |
| • | Fuel Gauge Inaccurate or Inoperative |
| • | Odometer Does Not Switch Between Trip and Season |
| • | Speedometer and/or Odometer Inoperative |
| • | Engine Oil Pressure Indicator Inoperative |
| • | SERVICE VEHICLE SOON Indicator Inoperative |
