INSPECTION PROCEDURE C-2: Driver’s Power Window does 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 driver’s power window does not work by means of the power window main switch, a malfunction of the power window main switch or the front power window motor (driver’s side) is suspected.

PROBABLE CAUSES

Malfunction of the power window main switch
Malfunction of the front power window motor (driver’s side)
Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

Step 1. 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 2.

STEP 2. Check the power window main switch.

Check that the passenger’s or rear power window works by means of the power window main switch.

Q. Is the check result normal?

Go to Step 3.

Refer to inspection procedure C-1 "power windows do not work at all

STEP 3. Connector check: E-18 power window main switch connector, E-15 front power window motor (driver’s side) connector

Q. Is the check result normal?

Go to Step 4.

Repair the defective connector.

STEP 4. Check of he wiring harness between the E-18 power window main switch connector terminal Nos. 1, 7 and the E-15 front power window motor (driver’s side) connector terminal Nos. 4, 1

Check the input/output lines for open circuit and short circuit.

Q. Is the check result normal?

Go to Step 5.

Repair the wiring harness.

STEP 5. Retest the system.

Check that the driver’s power window works 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 the front power window motor (driver’s side).