INSPECTION PROCEDURE 4: Front and/or rear passenger’s power window(s) do not work by means of the power window main switch.


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 passenger’s and/or rear power window(s) do not work by means of the power window main switch, a malfunction of the power window main switch or the power window sub switch is suspected.

PROBABLE CAUSES

  • Malfunction of the power window main switch
  • Malfunction of the power window sub switch
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1. Check the power window main switch.
Check that the driver’s power window works by means of the power window main switch.

Q. Is the check result normal?
Go to Step 2.
Refer to .

STEP 2. Check the power window sub switch.
Check that each power window works by means of the respective power window sub switch when the power window lock switch is turned off.

Q. Is the check result normal?
Go to Step 3.
Refer to .

STEP 3. 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 4.
Refer to GROUP 54A - Malfunction of ETACS-ECU Power Supply Circuit .

Step 4. M.U.T.-III diagnosis code
Check that the power window sub switches sets a diagnosis code.

Q. Is the diagnosis code set?
Refer to diagnosis code chart .
Go to Step 5.

STEP 5. Retest the system.
Check that the front and/or rear passenger’s power windows work by means of the power window main switch.

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 power window main switch.