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

  • Malfunction of the driver’s door switch
  • Malfunction of the sunroof motor assembly
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors

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:

  • Hazard warning lamp
  • Central door locking system

Q. Is the check result normal?
Go to Step 2.
Refer to GROUP 54A - Abnormality in 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 GROUP 54B - Diagnosis code chart .
Go to Step 3.

STEP 3. Check the customise function.


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

  • 30 seconds
  • 180 seconds
  • 600 seconds

Q. Is the check result normal?
Go to Step 4.
Set either of the followings other than "0 seconds" for "Power window, sunroof key off timer period" with the customisation function (Refer to ).

STEP 4. M.U.T.-III data list
Check the signals related to the sunroof timer function operation.

  • Turn the ignition switch to the ON position.
  • Close the driver’s door.
Item No.
 Item name
 Normal condition
254
 IG voltage
 Voltage
256
 Dr door ajar switch
 Close
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?
Normal conditions are displayed for all the items. : Go to Step 5.
Normal condition is not displayed for item No. 254. : Refer to GROUP 54A - Inspection Procedure 2: The Ignition Switch (IG1) Signal is not Received .
Normal condition is not displayed for item No. 256. : Refer to GROUP 54A - Inspection Procedure 5: Front Door Switch (driver’s door) 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 the ETACS-ECU. Check that the sunroof timer function works normally.