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Power Windows Malfunction




Power Windows Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information






Circuit/System Description

When the ignition switch is in the RUN or ACCY position, or retained accessory power (RAP) is enabled and the driver or passenger window switch is pressed in the down position, voltage is applied to the appropriate window motor causing that window to open. When the driver or passenger window switch is pulled in the up position, voltage is applied to the appropriate window motor in the opposite direction causing that window to close.

Reference Information

Schematic Reference

Moveable Window Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

Description and Operation

Power Windows Description and Operation Power Windows

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Circuit/System Verification

1. Ignition ON, command the driver window UP and DOWN using the driver window switch. The driver window should perform the UP and DOWN functions.

• If the driver window does not perform the UP/DOWN function, refer to Driver Window Malfunction.

2. Command the passenger window UP and DOWN using the RF window switch on the driver master control and the passenger door window switch. The passenger window should perform the UP and DOWN functions from each switch.

• If the passenger window does not perform the UP/DOWN function, refer to Front Passenger Window Malfunction.

3. Command the express down of the driver door window by pressing the driver window switch past the first detent and releasing. The driver window should roll completely down.

• If the driver window fails to roll completely down, replace the driver window switch.

Circuit/System Testing

Driver Window Malfunction

1. Ignition OFF, disconnect the harness connector at the driver window switch.

2. Test for less than 1 ohms between the ground circuit terminal F and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal C and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Ignition OFF, connect the harness connector at the driver window switch and disconnect the harness connector at the driver window motor.

5. Test for less than 1 ohms between the control circuit terminal B and ground.

• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the driver window switch.

6. Test for less than 1 ohms between the control circuit terminal A and ground.

• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the driver window switch.

7. Connect a test lamp between control circuit terminal B and control circuit terminal A.

8. Ignition ON, command the driver door window UP and DOWN using the driver window switch. The test lamp should illuminate when commanding the UP and DOWN states.

• If the test lamp does not illuminate during either of the commands, test both control circuits for a short to ground. If the circuits test normal, test or replace the driver window switch.

9. If all circuits tests normal, test or replace the driver window motor.

Front Passenger Window Malfunction

1. Ignition OFF, disconnect the harness connector at the front passenger window switch.

2. Ignition ON, verify that a test lamp illuminates between the B+ terminal A and ground.

• If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.

3. Ignition OFF, test for less than 1 ohms between the control circuit terminal H and ground.

• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the driver window switch.

4. Test for less than 1 ohms between the control circuit terminal D and ground.

• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the driver window switch.

5. Connect a test lamp between control circuit terminal H and control circuit terminal D.

6. Ignition ON, command the front passenger door window UP and DOWN by using the RF window switch on the driver master control. The test lamp should illuminate when commanding the UP and DOWN states.

• If the test lamp does not illuminate during either of the commands, test both control circuits for a short to ground. If the circuits test normal, test or replace the driver window switch.

7. Ignition OFF, connect the harness connector at the front passenger window switch and disconnect the harness connector at the front passenger window motor.

8. Test for less than 1 ohms between the control circuit terminal A and ground.

• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the front passenger window switch.

9. Test for less than 1 ohms between the control circuit terminal B and ground.

• If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the front passenger window switch.

10. Connect a test lamp between control circuit terminal B and control circuit terminal A.

11. Ignition ON, command the front passenger door window UP and DOWN using the passenger window switch. The test lamp should illuminate when commanding the UP and DOWN states.

• If the test lamp does not illuminate during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, test or replace the front passenger window switch.

12. If all circuits test normal, test or replace the front passenger window motor.

Component Testing

Driver Window Switch

1. Ignition OFF, disconnect the harness connector at the driver window switch.

2. Test for infinite resistance between the control terminals A and D and the B+ circuit terminal C with the RF switch in the INACTIVE position.

• If less than the specified value, replace the driver window switch.

3. Test for less than 2 ohms between the control terminal A and the B+ circuit terminal C with the RF switch in the UP position.

• If greater than the specified range, replace the driver window switch.

4. Test for less than 2 ohms between the control terminal D and the B+ circuit terminal C with the RF switch in the DOWN position.

• If greater than the specified range, replace the driver window switch.

5. Test for infinite resistance between the control terminals G and H and the B+ circuit terminal C with the driver switch in the INACTIVE position.

• If less than the specified value, replace the driver window switch.

6. Test for less than 2 ohms between the control terminal G and the B+ circuit terminal C with the switch in the UP position.

• If greater than the specified range, replace the driver window switch.

7. Test for less than 2 ohms between the control terminal H and the B+ circuit terminal C with the switch in the DOWN position.

• If greater than the specified range, replace the driver window switch.

Passenger Window Switch

1. Ignition OFF, disconnect the harness connector at the passenger window switch.

2. Test for infinite resistance between the control terminals G and F and the B+ terminal A with the switch in the INACTIVE position.

• If less than the specified value, replace the window switch.

3. Test for less than 2 ohms between the control terminal G and the B+ terminal A with the switch in the UP position.

• If greater than the specified range, replace the window switch.

4. Test for less than 2 ohms between the control terminal F and the B+ terminal A with the switch in the DOWN position.

• If greater than the specified range, replace the window switch.

Window Motor

1. Ignition OFF, disconnect the harness connector at the appropriate window motor.

2. Install a 25 A fused jumper wire between the control terminal A and 12 V. Momentarily install a jumper wire between the control terminal B and ground. The window motor should perform the UP/DOWN function.

• If the function does not perform as specified, replace the window motor.

3. Reverse the jumper wires; the window motor should perform the DOWN/UP function.

• If the function does not perform as specified, replace the window motor.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

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