INSPECTION PROCEDURE C-5: The power window 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 power window timer does not work normally, a malfunction of the power window main switch or ETACS-ECU is suspected.

PROBABLE CAUSES



  • Malfunction of the driver’s door switch
  • Malfunction of the front passenger’s door switch
  • Malfunction of the power window main switch
  • 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

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 power window operation.

  • Turn the ignition switch to the ON position.
  • Close the driver’s door.
  • Close the front passenger’s door.
Item No.
Item name
Normal condition
254
IG Voltage
System voltage
256
Dr door ajar switch
Close
257
As 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 3.
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 side) signal is not received .
Normal condition is not displayed for item No. 257. : Refer to GROUP 54A - Inspection Procedure 6: Front door switch (passenger’s side) signal is not received .

STEP 3. Retest the system.


Check that the power window timer function works normally.

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
Replace the power window main switch (Refer to GROUP 52A, Trims - Door trim ).