Inspection and Verification

INSPECTION AND VERIFICATION

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. Carry out the continuous and on-demand self tests for the SJB.
- If any DTCs are retrieved related to the concern, refer to Body Control Systems (Multifunction Electronic Control Module).
- If no DTCs are retrieved, go to the next step.

3. For Expedition, verify the low beam operation.
- Place the headlamp switch in the HEADLAMPS ON position.
- If the low beams do not operate correctly, refer to Lighting and Horns.
- If the low beams operate correctly and the DRL operation is incorrect, proceed to the next step.

4. For Navigator, verify the fog lamp operation.
- Place the ignition switch in the RUN position.
- Place the headlamp switch in the HEADLAMPS ON position and engage the fog lamp switch.
- If the fog lamps do not operate correctly, refer to Lighting and Horns.
- If the fog lamps operate correctly and the DRL operation is incorrect, proceed to the next step.

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