Inspection And Verification
CAUTION:
Diagnosis by substitution from a donor vehicle is NOT
acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle
- Verify the customer concern
- Confirm which, if any, warning indicators and/or messages were displayed on the instrument cluster. For a list of messages: Refer to: MESSAGE CENTER .
- Visually inspect for obvious electrical faults
- With the ignition on, check the operation of the audio output from the instrument cluster integrated speakers by operating the turn signal indicators (left and right) and verifying that audible feedback (a ticking sound) is presentVISUAL INSPECTION
ELECTRICAL - Battery
- Fuses
- Passenger and battery junction boxes
- Megafuses
- Wiring harness
- Damaged, loose or corroded connectors
- CAN circuits
- Instrument cluster
- Gateway module
- Engine control module
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
- Use the approved diagnostic system or a scan tool to retrieve any Diagnostic Trouble Code(s) (DTC)s before moving onto the DTC
index
- Make sure that all DTC s are cleared following rectification