Alarm Module: Testing and Inspection

Control Unit Input Test

NOTE: Before troubleshooting the keyless entry/security control system, troubleshoot the multiplex integrated control system first using B-CAN System Diagnosis Test Mode A.
Make sure the ignition switch OFF before troubleshooting the under-dash fuse/relay box.

MICU

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




3. Disconnect the 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 the input tests prove OK, go to step 6.







6. Reconnect all connectors to the under-dash fuse/relay box. Turn the ignition switch ON (II), and make these input tests at the appropriate connectors on the driver's under-dash fuse/relay box.
- 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 7.

Relay Control Module

7. Turn the ignition switch OFF.
8. Remove the under-hood fuse/relay box.




9. Remove the under cover from the under-hood fuse/relay box, and disconnect the connector H (18P).
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 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 12.




12. Reconnect the connector to the under-hood fuse/relay box, turn the ignition switch ON (II) and make the input test at the appropriate connector on the under-hood fuse/relay box.
- If a test indicates a problem, find and correct the cause, then recheck the system.
- If the input test proves OK, go to step 13.

Door Multiplex Control Unit

13. Turn the ignition switch OFF.
14. Remove the power window master switch.




15. Disconnect the 23P connector from the power window master switch.
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 input tests at the connector.
- If the test indicates a problem, find and correct the cause, then recheck the system.
- If the input tests prove OK, go to step 18.




18. Reconnect the connector to the door multiplex control unit. Turn the ignition switch ON (II) 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, go to step 19.

19. If all the input tests prove OK, and no DTCs were found during MICS troubleshooting (B-CAN System Diagnostic Test Mode A), go to the B-CAN system input and output index. System Description If multiple failures are found on more than one control unit, replace the under-dash fuse/relay box (includes the MICU). If input failures are related to a particular control unit, replace that control unit.