INSPECTION PROCEDURE C-2: Driver's Power Window Does Not Work By Means Of The Power Window Main Switch: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. 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?
- YES: Go to Step 2
- NO: Replace the power window main switch.
STEP 2. Voltage measurement at power window main switch connector (+BP terminal).
1. Disconnect the connector, and measure at the wiring harness side.
2. Measure the voltage between the power window main switch connector (+BP terminal) and body ground.
  OK: System voltage
Q: Is the check result normal?
- YES: Go to Step 4
- NO: Go to Step 3
STEP 3. Check of short to power supply, short to ground, and open circuit in +BP line between ETACS-ECU connector and power window main switch connector.
Q: Is the check result normal?
- YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
- NO: Repair the connector(s) or wiring harness.
STEP 4. Check of short to power supply, short to ground, and open circuit in MU, MD line between power window main switch connector and front power window motor (LH) connector.
Q: Is the check result normal?
- YES: Go to Step 5
- NO: Repair the connector(s) or wiring harness.
STEP 5. Retest the system.
1. Make the power windows learn their fully closed position. (LEARNING PROCEDURES OF POWER WINDOW FULLY CLOSED POSITION < DRIVER'S SIDE DOOR > )
2. Check that the driver's power window works normally by means of the power window main switch.
Q: Is the check result normal?
- YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
- NO: Replace the front power window motor (LH).