INSPECTION PROCEDURE 4: The ignition key reminder function does not work normally.


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

COMMENTS ON TROUBLE SYMPTOM


If the key reminder function does not work normally, the input signal circuits below or the ETACS-ECU may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Check the power supply system.


With the ignition switch in the LOCK (OFF) position, check if the following function operates normally:

Q. Is the check result normal?

Go to Step 2.

Refer to GROUP 54A - Malfunction of ETACS-ECU Power Supply Circuit .

STEP 2. M.U.T.-III data list


Check the signals related to the ignition key reminder function operation.

Item No.
 Item name
 Normal condition
19
 Driver’s door switch
 ON
20
 Driver’s door unlock switch
 ON → OFF
21
 Driver’s door lock switch
 OFF → ON
28
 Steering lock switch
 OFF
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?

Normal conditions are displayed for all the items. : Go to Step 3.

Normal condition is not displayed for item No. 19. : Refer to GROUP 54A - Inspection Procedure 5 "The front door switch (driver’s side) signal is not received. ".

Normal condition is not displayed for item No. 20, 21. : Refer to GROUP 54A - Inspection Procedure 4 "The front door lock actuator (driver’s side) signal is not received. ".

Normal condition is not displayed for item No. 270 or 271. : Refer to GROUP 54A - Inspection Procedure 3 "The key reminder switch signal is not received. ".

STEP 3. Retest the system.


Q. Does the ignition key reminder function work normally?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the ETACS-ECU.