Inspection and Verification

INSPECTION AND VERIFICATION

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

VISUAL INSPECTION CHART

Electrical
- Smart junction box (SJB) fuse 15 (10A)
- Bulb(s)
- Circuitry
- Manual temperature control
- Steering wheel controls
- PRNDL display
- Adjustable pedal switch (if equipped)
- Center stack switches (includes the hazard, traction control [if equipped], and parking aid disable switches [if equipped])
- Analog clock (if equipped)
- Decklid release switch (if equipped)
- Auxiliary climate control switches (if equipped)
- Power door lock switches
- Power window switches
- Headlamp switch
- EATC module and switches
- Audio unit
- SJB
- Instrument cluster

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. Verify the exterior lamps operate correctly. If the exterior lamps do not operate correctly, refer to Lighting and Horns to continue diagnosis of the exterior lamps.
5. If the cause is not visually not evident, connect the diagnostic tool to the data link connector (DLC) 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 program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.

6. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
7. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- CAN circuits fault; all electronic control units no response/not equipped, refer to Information Bus (Module Communications Network).
- No response/not equipped for SJB, refer to Body Control Systems (Multifunction Electronic Control Module).
- No response/not equipped for instrument cluster, refer to Instrument Cluster.
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the SJB and the instrument cluster.

8. If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index. Trouble Code Diagnostic Charts - Instrument Cluster and Panel Illumination
9. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Diagnosis By Symptom - Instrument Panel Illumination

NOTE: For a complete list of SJB or instrument cluster DTCs, refer to Body Control Systems (Multifunction Electronic Control Module).