Inspection and Verification

INSPECTION AND VERIFICATION

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

VISUAL INSPECTION CHART

Electrical
- Battery junction box (BJB) fuse(s):
- 15 (40A) (no communication with ABS module)
- 16 (30A) (no communication with climate controlled seat module)
- 50 (10A) (no communication with ABS module)
- 51 (5A) (no communication with adaptive front lighting module)
- 57 (40A) (no communication with ABS module)
- 59 (30A) (no communication with power liftgate module)
- 60 (30A) (no communication with driver seat module [DSM])

- Smart junction box (SJB) fuse(s):
- 3 (15A) (no communication with digital versatile disc [DVD] player)
- 5 (10A) (no communication with SJB)
- 11 (10A) (no communication with four wheel drive [4WD] control module)
- 12 (7.5A) (no communication with DSM)
- 13 (7.5A) (no communication with satellite radio receiver)
- 14 (10A) (no communication with power liftgate module)
- 15 (10A) (no communication with electronic automatic temperature control [EATC] module)
- 18 (20A) (no communication with THX(R) amplifier)
- 20 (15A) (no power to scan tool)
- 26 (10A) (no communication with instrument cluster)
- 28 (5A) (no communication with audio unit)
- 29 (5A) (no communication with instrument cluster)
- 34 (5A) (no communication with steering angle sensor module)
- 35 (10A) (no communication with parking aid module, 4WD control module)
- 37 (10A) (no communication with EATC module)
- 38 (20A) (no communication with THX(R) amplifier)
- 39 (20A) (no communication with audio unit)
- 41 (15A) (no communication with audio unit)
- 46 (7.5A) (no communication with restraints control module [RCM], occupant classification sensor module)

- Data link connector (DLC)
- Wiring harness
- Wiring, terminals or connectors

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. NOTE: Make sure to use the latest scan tool software release.

If the cause is not visually evident, connect the scan tool to the DLC.

NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.

If the scan tool does not communicate with the VCM:
- Check the VCM connection to the vehicle.
- Check the scan tool connection to the VCM.
- GO to Pinpoint Test U, to diagnose no power to the scan tool. Test U: No Power To The Scan Tool

5. NOTE: During the network test, the scan tool will first attempt to communicate with the PCM, after establishing communication with the PCM, the scan tool will then attempt to communicate with all other modules on the vehicle.

Carry out the network test.
- If the network test passes, retrieve and record the continuous memory DTCs and proceed to Step 6.
- If the network test fails, GO to Symptom Chart to continue diagnosis for the module not communicating. Symptom Related Diagnostic Procedures

6. If the DTCs retrieved are related to the concern, go to the Communication Network DTC Chart. For all other DTCs, refer to Body Control Systems (Multifunction Electronic Control Module). Module Communications Network

NOTE: Follow the non-network DTC diagnostics (B-codes, C-codes, P-codes) prior to the network DTC (U-codes) diagnostics.

7. If no DTCs related to the concern are retrieved, GO to Symptom Chart. Symptom Related Diagnostic Procedures