Interior Lighting Module: Testing and Inspection

Control Unit Input Test

NOTE: Before troubleshooting the entry lights control system, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test mode A, and make sure the Keyless Access System operates normally.

MICU
1. Turn the ignition switch OFF.
2. Remove the left kick panel.




3. Disconnect the driver's under-dash fuse/relay box connectors.

NOTE: All connector views are wire side of female terminals.

4. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary and recheck the system
- If the terminals look OK, go to step 5.




5. With the connectors still disconnected, make these input tests at the connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 6.




6. Reconnect the connectors to the driver's under-dash fuse/relay box, and make these input tests at the connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the MICU must be faulty, replace the driver's under-dash fuse/relay box assembly.

DRIVER'S MPCS UNIT

7. Turn the ignition switch OFF.
8. Remove the driver's door panel.




9. Disconnect the driver's MPCS unit connector A (40P).
10. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.
- If the terminals look OK, go to step 11.




11. With the connector still disconnected, make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then e system.
- If all the input tests prove OK, go to step 12.




12. Reconnect the connector to the driver's MPCS unit, turn the ignition switch ON (II), and make these tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 13.

PASSENGER'S MPCS UNIT

13. Turn the ignition switch OFF.
14. Remove the front passenger's door panel.




15. Disconnect the passenger's MPCS unit connector A (28P).
16. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.
- If the terminals look OK, go to step 17.




17. With the connector still disconnected, make these in put tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 18.




18. Reconnect the connector to the passenger's MPCS unit, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 19.

LEFT REAR WINDOW SWITCH

19. Turn the ignition switch OFF.
20. Remove the left rear window switch.




21. Disconnect the 14P connector from the left rear window switch.
22. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.
- If the terminals look OK, go to step 23.




23. With the connector still disconnected, make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 24.

RIGHT REAR WINDOW SWITCH

24. Turn the ignition switch OFF.
25. Remove the right rear window switch.




26. Disconnect the 14P connector from the right rear window switch.
27. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary and recheck the system.
- If the terminals look OK, go to step 28.




28. With the connector still disconnected, make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 29.

29. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the MICU). If input failures are related to a particular control unit, replace the control unit.