Important: The following steps must be completed before using the symptom tables.
• | There are no DTCs set. |
• | The control modules can communicate via the serial data link. |
• | Inspect for aftermarket devices which could affect the operation of the Instrument Cluster or Audible Warning Systems. Refer to Checking Aftermarket Accessories. |
• | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
• | Inspect the applicable reservoir for the proper fluid level related to the indicator or message. |
• | Verify that the indicators work properly during the displays test. |
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections.
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
• | Service Indicator Always On for the NVG 226-NP8 transfer case |
• | Service Indicator Inoperative for the NVG 226-NP8 transfer case |
• | Malfunction Indicator Lamp (MIL) Diagnosis for the 4.2L engine |
• | Malfunction Indicator Lamp (MIL) Diagnosis for the 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L engine |
Driver Information Center (DIC) Switch Malfunction
Interior Backlighting Malfunction
Odometer Trip/Reset Switch Inoperative