INSPECTION PROCEDURE C-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, or ETACS-ECU is suspected.

PROBABLE CAUSES




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 inspection procedure C-2 "Driver’s power window does not work by means of the power window main switch ."

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 inspection procedure C-3 "Relevant power window(s) does not work by means of the front and rear passenger’s power window sub switches ."

STEP 3. 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 4.

Refer to GROUP 54A - Malfunction of ETACS-ECU power supply circuit .

STEP 4. M.U.T.-III diagnosis code


Check that ETACS-ECU sets a diagnosis code.

Q. Is the diagnosis code set?

Refer to GROUP 54B - Troubleshooting .

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 ETACS-ECU.