THEFT DETERRENT SYSTEM While Alarm is Armed, Battery is Reconnected but Alarm does not Sound

DESCRIPTION

While the alarm is armed, the EEPROM inside the main body ECU (multiplex network body ECU) will remember the armed state even if the auxiliary battery is disconnected, and the alarm will sound when the auxiliary battery is reconnected.

If the alarm does not sound when the auxiliary battery is reconnected, the alarm may not have been set, or there may be a malfunction in the main body ECU (multiplex network body ECU).

CAUTION / NOTICE / HINT

Note

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE


  1. CHECK SECURITY INDICATOR LIGHT OPERATION


    1. Close all doors, the luggage compartment door and hood.

    2. Lock the doors using, wireless operation or entry operation.

    3. Check that the security indicator light illuminates.

    4. After 30 seconds have elapsed, check that the security indicator light changes from illuminated to flashing.

      Tech Tips

      The illumination status of the security indicator light can be used to determine whether the theft deterrent system is set or unset.

      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    C

    GO TO THEFT DETERRENT SYSTEM CANNOT BE SET OR UNSET Click here