INSPECTION PROCEDURE 6: The Sunroof Timer 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 sunroof timer function does not work normally, a malfunction of the communication circuit, the driver’s door switch input circuit, the sunroof motor assembly or ETACS-ECU is suspected. Also, the sunroof timer function may have been set to "0 seconds" with the customisation function.

PROBABLE CAUSES




DIAGNOSTIC 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 diagnosis code


Check that any sunroof operation-related diagnosis codes are set in ETACS-ECU.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 3.

STEP 3. Check the customise function.


Check that either of the followings other than "0 sec" is set for "Power window key off timer" with the customisation function.

Q. Is the check result normal?

Go to Step 4.

Set either of the followings other than "0 sec" for "Power window key off timer" with the customisation function (Refer to ).

STEP 4. M.U.T.-III data list


Check the signals related to the sunroof timer function operation.

Item No.
Item name
Normal condition
254
IG voltage
Battery voltage
256
Dr door ajar switch
Close
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?

YES <Normal conditions are displayed for all the items.> : Go to Step 5.

NO <Normal condition is not displayed for item No. 254.> : Refer to GROUP 54A - inspection procedure 2: the ignition switch (IG1) signal is not received .

NO <Normal condition is not displayed for item No. 256.> : Refer to GROUP 54A - inspection procedure 5: the front door switch (driver’s side) signal is not received. .

STEP 5. Retest the system.


Q. Does the sunroof time function work normally?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace ETACS-ECU.