Inspection Procedure 11: 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
Malfunction of ETACS-ECU
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 (Refer to GROUP 54A - ETACS, ETACS-ECU ).