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Power Windows Malfunction (A31/AN3/DL3)




Power Windows Malfunction (A31/AN3/DL3)

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. When a power window switch is activated in the up or down positions the driver door switch (DDS) supplies power and ground to the window motor control circuits to drive the window motor in the required direction. Prior to activating a power window motor the DDS will supply the control circuit with a low current bias voltage in order to determine that a short to ground condition does not exist and during window motor operation the DDS continues to monitor the motor current to verify proper window motor operation.

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)
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 from each switch.

• If the driver window is inoperative, refer to Driver Window Malfunction.
• If the front passenger window is inoperative, refer to Passenger Window Malfunction.
• If either rear passenger power window is inoperative, 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 parameter does not change, replace the DDS.

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 parameter does not change, replace the DDS.

Circuit/System Testing

Driver Window Malfunction
1. Ignition OFF, disconnect the X1 harness connector at the DDS.
2. Test for less than 1 ohm between the ground circuit terminal 6 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 2 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 that a test lamp illuminates between the B+ circuit terminal 4 and ground.

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

5. Ignition OFF, connect the X1 harness connector at the DDS.
6. 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 parameter does not change, replace the DDS

7. Ignition OFF, disconnect the harness connector at the driver window motor.
8. Connect a test lamp between the 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 or open/high resistance. If the circuits test normal, replace the DDS
• If the test lamp is always ON, test either control for a short to voltage. If the circuits test normal, replace the DDS

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

Passenger Window Malfunction
1. Ignition OFF, disconnect the harness connector at the PDS.
2. Test for less than 1 ohm between the ground circuit terminal 6 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 2 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 that a test lamp illuminates between the B+ circuit terminal 4 and ground.

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

5. Ignition OFF, connect the X1 harness connector at the PDS.
6. 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 parameter does not change, replace the PDS

7. Ignition OFF, disconnect the harness connector at the passenger window motor.
8. Connect a test lamp between the 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 or open/high resistance. If the circuits test normal, replace the PDS
• If the test lamp is always ON, test either control for a short to voltage. If the circuits test normal, replace the PDS.

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

Rear Passenger 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. Enable the rear window switches by using 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 harness connector at 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

1. Ignition OFF, disconnect the harness connector at the appropriate window motor.
2. Install a 25A fused jumper wire between one of the control terminals and 12V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the window motor should perform the UP/DOWN functions.

• If it 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 Regulator Motor Replacement (Crew Cab) (Rear Side Door Window Regulator Motor Replacement (Crew Cab))Rear Side Door Window Regulator Motor Replacement (Extended Cab) (Rear Side Door Window Regulator Motor Replacement (Extended Cab))
* Front Side Door Window Regulator Motor Replacement (Front Side Door Window Regulator Motor Replacement)
* Rear Side Door Window Switch Replacement (Crew Cab) (Rear Side Door Window Switch Replacement (Crew Cab))Rear Side Door Window Switch Replacement (Extended Cab) (Rear Side Door Window Switch Replacement (Extended Cab))
* Control Module References (Programming and Relearning) for DDS, PDS and BCM replacement, setup and programming

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