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Power Windows Malfunction (Passenger)




Power Windows Malfunction (Passenger)

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

The passenger window is controlled by the door lock/window switch only for the detective model or by the door lock/window switch and the passenger window switch for the police model. When the appropriate window switch is pressed in the down position, a 12V signal is sent to the window control module which supplies voltage to the passenger motor passenger window motor down circuit and ground is applied to the passenger window motor up circuit causing the passenger window to open. When the window switch is pulled in the up position, a signal is sent to the window control module which reverses the polarity of the passenger window motor and the window closes.

Reference Information

Schematic Reference

Moveable Window Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

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. Detective model, Ignition ON, command passenger window UP and DOWN using the appropriate window switch on the door lock/window switch. The passenger window should perform the UP and DOWN functions.

• If the passenger window does not perform as specified, refer to Passenger Window Inoperative, Detective Model.

2. Police model, Ignition ON, command the passenger window UP and DOWN using the appropriate window switch on the door lock/window switch and by using the window switch-passenger. The passenger window should perform the UP and DOWN functions from both switches.

• If the passenger window does not perform as specified, refer to Passenger Window Inoperative, Police Model.

Circuit/System Testing

Passenger Window Inoperative, Detective Model

1. Ignition OFF, disconnect the harness connector at the K90 window control module.

2. Connect a test lamp between the signal circuit terminal 3 and ground.

3. Command the passenger window UP by using the S101 door lock/window switch. The test lamp should illuminate during the UP command.

• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the S101 door lock/window switch.

• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the S101 door lock/window switch.

4. Connect a test lamp between the signal circuit terminal 9 and ground.

5. Command the passenger window DOWN by using the S101 door lock/window switch. The test lamp should illuminate during the DOWN command.

• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the S101 door lock/window switch.

• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the S101 door lock/window switch.

6. Ignition OFF, connect the harness connector at the K90 window control module.

7. Disconnect the harness connector at the M74P window motor-passenger.

8. Ignition ON, connect a test lamp between the control circuit terminal A and control circuit terminal B.

9. Command the passenger window UP and DOWN by using the window switch on the S101 door lock/window switch. The test lamp should illuminate during the UP and DOWN command.

• If the test lamp is always OFF during either for the commands, test either control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K90 window control module.

• If the test lamp is always ON, test either signal circuit for a short to voltage. If the circuit tests normal, test or replace the K90 window control module.

10. If all circuits test normal, test or replace the M74P window motor-passenger.

Passenger Window Inoperative, Police Model

1. Ignition OFF, disconnect the X2 harness connector at the S79P door window switch-passenger.

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.

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

3. Ignition OFF, disconnect the harness connector at the K90 window control module.

4. Connect a test lamp between the signal circuit terminal 3 and ground.

5. Command the passenger window UP by using the S101 door lock/window switch. The test lamp should illuminate during the UP command.

• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the S101 door lock/window switch.

• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the S101 door lock/window switch.

6. Connect a test lamp between the signal circuit terminal 9 and ground.

7. Command the passenger window DOWN by using the S101 door lock/window switch. The test lamp should illuminate during the DOWN command.

• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the S101 door lock/window switch.

• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the S101 door lock/window switch.

8. Ignition OFF, connect the X2 harness connector at the S79P window switch passenger.

9. Connect a test lamp between the signal circuit terminal 3 and ground.

10. Command the passenger window UP by using the S79P window switch passenger. The test lamp should illuminate during the UP command.

• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the S79P window switch passenger.

• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the S79P window switch passenger.

11. Connect a test lamp between the signal circuit terminal 9 and ground.

12. Command the passenger window DOWN by using the S79P window switch passenger. The test lamp should illuminate during the DOWN command.

• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the S79P window switch passenger.

• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the S79P window switch passenger.

13. Ignition OFF, connect the harness connector at the K90 window control module.

14. Ignition ON, connect a test lamp between the control circuit terminal A and control circuit terminal B.

15. Command the passenger window UP and DOWN by using the window switch on the S101 door lock/window switch. The test lamp should illuminate during the UP and DOWN command.

• If the test lamp is always OFF during either for the commands, test either control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K90 window control module.

• If the test lamp is always ON, test either signal circuit for a short to voltage. If the circuit tests normal, test or replace the K90 window control module.

16. If all circuits test normal, test or replace the M74P window motor-passenger.

Component Testing

Door Lock/Window Switch

1. Ignition OFF, disconnect the X2 harness connector at the S101 door lock/window switch.

2. With the switch in the INACTIVE position, test for infinite resistance between the control terminals listed below and the ignition terminal 10:

* Control terminal 9

* Control terminal 10

• If less than the specified value, replace the S101 door lock/window switch.

3. With the switch in the UP position, test for less than 2 ohms between the control terminal 9 and the ignition terminal 10.

• If greater than the specified range, replace the S101 door lock/window switch.

4. With the switch in the DOWN position, test for less than 2 ohms between the control terminal 10 and the ignition terminal 10.

• If greater than the specified range, replace the S101 door lock/window switch.

Passenger Window Switch

1. Ignition OFF, disconnect the X2 harness connector at the S79P window switch.

2. Test for infinite resistance between the control terminals 9 and 10 and the ignition terminal 1 with the switch in the INACTIVE position.

• If less than the specified value, replace the S79P window switch.

3. Test for less than 2 ohms between the control terminal 9 and the ignition terminal 1 with the switch in the UP position.

• If greater than the specified range, replace the S79P window switch.

4. Test for less than 2 ohms between the control terminal 10 and the ignition terminal 1 with the switch in the DOWN position.

• If greater than the specified range, replace the S79P window switch.

Window Motor

1. Ignition OFF, disconnect the harness connector at the M74P window motor-passenger.

2. Install a 20 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the M74P window motor-passenger should perform the UP and DOWN functions.

• If it does not perform as specified, replace the M74P window motor-passenger.

Repair Instructions

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

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* Front Side Door Window Control Module Replacement Service and Repair

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