Inspection Procedure 12: 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 function operation


Check that the keyless entry function operation normally.

Q. Is the check result normal?

Go to Step 2

Refer to Inspection Procedure 11: "Keyless entry function does not work ."

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


Check if any diagnosis code is set to the KOS-ECU.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 3.

STEP 3. Check of the troubles


Check that the KOS timer lock function operates.

Q. Is the check result normal?

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

Perform troubleshooting for each door switch (Refer to GROUP 54A - ETACS - Troubleshooting ).