Inspection Procedure 4

None of the door windows are opened or closed by the power window main switch (on driver's door). However, they are opened or closed by the power window sub-switch on passenger's door.

Power Window Main Switch Power Supply Circuit:

CIRCUIT OPERATION
Power is supplied to the power window sub-switch from the power window relay.

TECHNICAL DESCRIPTION
- The cause may be a malfunction of the power window main switch power supply circuit.

TROUBLESHOOTING HINTS
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tool:
- MB991223: Harness Set




STEP 1. Check the power supply line at power window main switch connector H-05.
1. Remove the power window main switch.




2. Measure at the harness side the voltage between terminal 6 and ground when the ignition switch is turned ON.
- Voltage should be approximately 12 volts (battery positive voltage).

Q: Is the voltage approximately 12 volt?

YES: Go to Step 3.
NO: Go to Step 2.







STEP 2. Check the harness wires between power window main switch connector E-12 and connector block connector C-209.

Q: Are there any damaged wires between power window main switch connector E-12 and connector block connector C-209?

YES: Repair them, then go to Step 3.
NO: Go to step 3.






NOTE: After inspecting intermediate connector C-211, inspect the wire. If connector block connector C-21 us damaged, repair or replace it. Refer to Harness Connector Inspection. Then go to Step 3.

STEP 3. Check symptoms.

Q: Can the power window main switch on the driver's door open or close all door windows?

YES: This diagnosis is complete.
NO: Return to Step 1.