Inspection Procedure 9: KOS timer lock function does not work.


caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

OPERATION


After the door is unlocked using the keyless entry function or the door entry function, if no operation is performed, the door is locked when the time specified by a customisation function has elapsed. However, when an open signal of any of the doors is received by ETACS-ECU or when the engine switch power supply mode is ON, the KOS timer lock function will not be activated.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check the keyless entry or the door entry function operation


Check that the keyless entry or the door entry function operation normally.

Q. Is the check result normal?

Go to Step 2.

Refer to trouble symptom chart .

STEP 2. M.U.T.-III diagnosis code


Check if any diagnosis code is set in the KOS&OSS-ECU.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 3.

STEP 3. M.U.T.-III other system diagnosis code


Check if any diagnosis code is set in the ETACS-ECU.

Q. Is the diagnosis code set?

Perform troubleshooting for the ETACS (Refer to GROUP 54A - ETACS - Troubleshooting ).

Go to Step 4.

STEP 4. Check of the troubles


Check that the KOS timer lock function operates when the time specified by a customisation function has elapsed.

Q. Is the check result normal?

Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).

Replace ETACS-ECU.