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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

The driver and passenger door lock and side window switches are integrated control module switch assemblies. The driver door module (DDM) controls the passenger window through a serial data message to the passenger door module (PDM). When a power window switch is activated in the up or down positions the DDM or FPDM supplies power and ground to their respective window motor control circuits to drive the window motor in the required direction. The rear passenger power windows can also be operated from the DDM through a serial data message to the BCM. The rear passenger window switches on the DDM have 2 positions, up and down, their position is a direct input into the DDM. When the BCM receives a command to operate a rear window up or down, the appropriate signal is sent to the rear door window switch which will command the window motor to perform the up or down function.

Reference Information
Schematic Reference

* Moveable Window Schematics (Electrical Diagrams)
* Door Control Module Schematics (Door Control Module Schematics)

Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Power Windows Description and Operation (Power Windows Description and Operation)
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)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Ignition ON, observe the operation of the power windows while commanding each window UP and DOWN by using their respective window switches, each window should perform the UP and DOWN function.

• If the driver window malfunctions, refer to Driver Window Malfunction.
• If the front passenger window malfunctions, refer to Passenger Window Malfunction.
• If either rear passenger power window malfunctions, refer to Rear Passenger Window Malfunction.

2. Observe the scan tool Driver RF Window Switch, Driver LR Window Switch and Driver RR Window Switch parameters while using the driver master control switches. The parameter should change between Off, Up, Down, and Express Down.

• If the value does not change, replace the DDM.

3. Observe the scan tool Window Lockout Switch parameter while pressing and depressing the window lockout switch on the driver master control. The parameter should change between ON and OFF.

• If the value does not change, replace the DDM.

Circuit/System Testing

Driver Power Window Malfunction
1. Ignition OFF, disconnect the X1 harness connector at the DDM.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.

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

3. Ignition OFF, connect the X1 harness connector at the DDM.
4. Ignition ON, observe the scan tool Driver Window Switch parameters while using the driver power window switch. The parameter should change between Off, Up, Down, and Express Down.

• If the value does not change, replace the DDM.

5. Ignition OFF, disconnect the harness connector at the driver window motor.
6. Test for less than 1 ohm 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, replace the DDM.

7. Test for less than 1 ohm 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, replace the DDM.

8. Connect a test lamp between control circuit terminal A and control circuit terminal B.
9. Ignition ON, command the driver window UP and DOWN by using the driver window switch. The test lamp should illuminate when commanding the UP and DOWN states.

• If the test lamp is always OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the DDM.

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

Passenger Power Window Malfunction
1. Ignition OFF, disconnect the X1 harness connector at the PDM.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.

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

3. Ignition OFF, connect the X1 harness connector at the PDM.
4. Ignition ON, observe the scan tool Passenger Window Switch parameters while using the passenger power window switch. The parameter should change between Off, Up, Down, and Express Down.

• If the value does not change, replace the PDM.

5. Ignition OFF, disconnect the harness connector at the passenger window motor.
6. Test for less than 1 ohm 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, replace the PDM.

7. Test for less than 1 ohm 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, replace the PDM.

8. Connect a test lamp between control circuit terminal A and control circuit terminal B.
9. Ignition ON, command the passenger window UP and DOWN by using the passenger window switch. The test lamp should illuminate when commanding the UP and DOWN states.

• If the test lamp is always OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the PDM.

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

Rear Window Malfunction
1. Ignition OFF, disconnect the harness connector at the appropriate rear window switch.
2. Test for less than 1 ohm 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 G and ground.

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

4. Verify the scan tool LR Window Enable Cmd. and RR Window Enable Cmd. parameters are On.

• If not the specified value, press the window lockout switch on the driver master control.

5. Test for greater than 9 volts between the control circuit terminal D and ground.

• If less than the specified range, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.

6. Test for greater than 9 volts between the signal circuit terminal C and ground while commanding the Rear Window DOWN with a scan tool.

• If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.

7. Test for greater than 9 volts between the signal circuit terminal A and ground while commanding the Rear Window UP with a scan tool.

• If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.

8. Ignition OFF, connect the rear window switch and disconnect the harness connector at the rear window motor.
9. Connect a test lamp between the control circuit terminal A and control circuit terminal B.
10. Ignition ON, command the rear window UP and DOWN by using the rear window switch. The test lamp should illuminate when commanding the UP and DOWN states.

• If the test lamp is always OFF during either of the commands, test either control circuit for a short to ground or open/high resistance. If the circuits test normal, replace the rear window switch

• If the test lamp is always ON, test either control circuit for a short to voltage. If the circuits test normal, replace the rear window switch.

11. If all circuits test normal, test or replace the rear window motor.

Component Testing

Window Motor
1. Ignition OFF, disconnect the harness connector at the appropriate window motor.
2. Install a 25 amp fused jumper wire between the control terminal A and 12 volts. Momentarily install a jumper wire between the control terminal B and ground. The window motor should perform the UP or 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 or 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.

* Rear Side Door Window Switch Replacement (Rear Side Door Window Switch Replacement)
* Front Side Door Window Regulator Motor Replacement (Front Side Door Window Regulator Motor Replacement)
* Rear Side Door Window Regulator Motor Replacement (Rear Side Door Window Regulator Motor Replacement)
* Control Module References (Programming and Relearning) for DDM, PDM and BCM replacement, setup and programming

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