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Inspection Procedure 9: KOS timer lock function does not work.
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground 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 customization 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
STEP 1. Check the keyless entry function or the door entry function operation
Check that the keyless entry function or the door entry function operation normally.
Is the check result normal?
Go to Step 2.
Refer to trouble symptom chart .
 
STEP 2. Using scan tool (M.U.T.-IIISE), check the DTC.
Check if any DTC is set in the KOS&OSS-ECU.
Is the DTC set?
Refer to diagnostic trouble code chart .
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check the other system DTC.
Check if any DTC is set in the ETACS-ECU.
Is the DTC set?
Perform troubleshooting for the ETACS (Refer to GROUP 54A - ETACS - Diagnosis ).
Go to Step 4.
 
STEP 4. Check of the troubles
Check that the KOS timer lock function operates when the time specified by a customization function has elapsed.
Is the check result normal?
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace ETACS-ECU (Refer to GROUP 54A - ETACS - ETACS-ECU ).