Initial Inspection and Diagnostic Overview

INSPECTION AND VERIFICATION

1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage:

VISUAL INSPECTION CHART

Electrical
- Bulbs
- Central junction box (CJB) fuse(s):
- 21 (15A).
- 24 (15A).
- Circuitry
- Vehicle security module
- Instrument cluster module

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- check that the diagnostic card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.

5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
6. Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with:
- CKT70, CKT914, CKT915 or CKT693 = ALL ECUS NO RESP/NOT EQUIP refer to Module Communications Network (Information Bus).
- NO RESPONSE/NOT EQUIPPED for Instrument cluster, refer to Instrument Panel, Gauges and Warning Indicators or Vehicle Security Module, refer to Multifunction Electronic Control Module (General Module).
- SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics.

7. If the DTCs retrieved are related to the concern, go to the Instrument Cluster Diagnostic Trouble Code (DTC) Index. Diagnostic Trouble Code Tests and Associated Procedures
8. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart. Symptom Related Diagnostic Procedures