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Inspection and Verification

INSPECTION AND VERIFICATION

NOTE: When installing a new smart junction box (SJB), it must be configured for this feature, if originally equipped. Refer to Information Bus (Module Communications Network).

1. Verify the customer concern by operating the daytime running lamps (DRL) following these steps:
- Place the ignition switch in the RUN position.
- Place the headlamp switch in the OFF position.
- Place the transmission in any gear other than PARK (P).
- If the DRL does not operate, make sure the SJB is configured for DRL before proceeding to the next step.

2. Verify the low beam operation.
- Place the headlamp switch in the HEADLAMPS ON position.
- If the low beams do not operate correctly, refer to Headlamps for correct diagnosis.
- If the low beams operate correctly and the DRL operation is incorrect, proceed to the next step.

3. Check the SJB inputs.
- Monitor the ignition switch PIDs and the transmission gear status PIDs.
- If the ignition switch PIDs do not agree with the ignition switch position, refer to Ignition Switch to continue diagnosis of the ignition switch.
- If the transmission gear status PIDs do not agree with the gear selector lever position, refer to Transmission Control Systems. or Transmission Control Systems to continue diagnosis of the transmission.
- If the PIDs indicate correct ignition and transmission gear status, install a new SJB. Refer to Body Control Systems (Multifunction Electronic Control Module). Test the system for normal operation.