Power Windows Malfunction (AXC/AXE)
Power Windows Malfunction (AXC/AXE)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The front and rear power windows are controlled by the driver door module (DDM) and front passenger door module (PDM). The DDM and PDM each contain power window switches that are integrated into the module. The DDM contains the master power window switches that control all power window operations. The power window switch contained in the PDM controls the front passenger window operation only.
When the driver power window switch is activated to a desired position, the DDM examines the request and checks for messages from other vehicle control modules prohibiting window movement. If no prohibitive messages have been received, the DDM will send a LIN serial data message to the driver door window motor to move the window to the desired position.
When the DDM receives a request to operate the right side passenger windows from the master switch, a GMLAN serial data message is sent to the PDM. The PDM examines the request and checks for messages from other vehicle control modules prohibiting the window movement. If no prohibitive messages have been received, the PDM will send a LIN serial data message to the appropriate window motor to move the window as requested.
When the DDM receives a request to operate a rear window from the master switch, a GMLAN serial data message is sent to the BCM. The BCM examines the request and checks for messages from other vehicle control modules prohibiting the window movement. If no prohibitive messages have been received, the BCM will send a LIN serial data message to the appropriate rear window switch which will command the window motor as requested.
Circuit/System Verification
1. Command the appropriate front power window UP/DOWN with a scan tool, the appropriate front power window should perform the UP/DOWN command.
^ If a front power window fails the UP/DOWN operation, refer to Front Window Motor Malfunction (RPO AXC).
2. Observe the operation of the power windows while pressing and pulling the window switches on the driver master control. Each window should perform the UP and DOWN command.
^ If a window fails the UP/DOWN operation, refer to Driver Window Switch Malfunction.
3. Observe the operation of passenger power window while pressing and pulling the passenger window switch, the window should perform the UP and DOWN command.
^ If the passenger window fails the UP/DOWN operation, refer to Passenger Switch Window Malfunction (RPO AXC) or Passenger Window Malfunction (RPO AXE).
4. Observe the operation of each rear window while pressing and pulling the appropriate rear door switch. The appropriate rear window should perform the UP and DOWN command.
^ If the either rear window fails the UP/DOWN operation, refer to Rear Window Malfunction.
Circuit/System Testing
Front Window Motor Malfunction (RPO AXC)
1. Ignition OFF, disconnect the harness connector at the appropriate window motor.
2. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal 4 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 1 and ground.
^ If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the appropriate window motor.
4. Ignition OFF, reconnect the appropriate window motor.
5. Ignition ON, command the appropriate power window UP/DOWN with a scan tool. The window should go UP/DOWN.
^ If the window fails to go UP/DOWN, check the serial data circuit terminal 6 for a short to ground or an open/high resistance. If the circuit tests normal, replace the appropriate window motor.
6. If all circuits tests normal, replace the appropriate door module.
Driver Window Switch Malfunction
1. Ignition OFF, disconnect the harness connector X1 at the DDM.
2. Ignition OFF, check for less than 1.0 ohm resistance between the ground circuit terminal 5 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 4 and ground.
^ If the test lamp does not illuminate, test the B+ circuit for a short to ground or open/high resistance. If the circuit tests normal and the DR/LCK fuse is open, replace the DDM.
4. Ignition OFF, reconnect the harness connector X1 at the DDM.
5. Ignition ON, observe the scan tool Window Up/Down Cmd parameter while pressing and pulling the appropriate power window switch on the driver master control. The reading should change between ON and OFF.
^ If the scan tool Window Up/Down Cmd parameter is always OFF or always ON, replace the DDM.
6. Ignition ON, observe the scan tool Window Enable Cmd parameter while pressing and depressing the appropriate window lockout switch on the driver master control. The reading should change between ON and OFF.
^ If the scan tool Window Enable Cmd parameter is always OFF or always ON, replace the DDM.
Passenger Window Switch Malfunction (RPO AXC)
1. Ignition OFF, disconnect the harness connector X1 at the PDM.
2. Ignition OFF, check for less than 1.0 ohm resistance between the ground circuit terminal 5 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 4 and ground.
^ If the test lamp does not illuminate, test the B+ circuit for a short to ground or open/high resistance. If the circuit tests normal and the DR/LCK fuse is open, replace the PDM.
4. Ignition OFF, reconnect the harness connector X1 at the PDM.
5. Ignition ON, observe the scan tool Window Up/Down Cmd parameter while pressing and pulling the power window switch. The reading should change between ON and OFF.
^ If the scan tool Window Up/Down Cmd parameter is always OFF or always ON, replace the PDM.
Passenger Window Malfunction (RPO AXE)
1. Ignition OFF, disconnect the harness connector X1 at the PDM.
2. Ignition OFF, check for less than 1.0 ohm resistance between the ground circuit terminal 5 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. If the circuit tests normal, replace the PDM.
4. Ignition OFF, reconnect the PDM and disconnect the harness connector at the passenger window motor.
5. Ignition OFF, test for less than 1.0 ohm of resistance 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 circuits test normal, replace the PDM.
6. Ignition OFF, test for less than 1.0 ohm of resistance 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 circuits test normal, replace the PDM.
7. Connect a test lamp between control circuit terminal A and control circuit terminal B.
8. Ignition ON, command the passenger window UP and DOWN by pressing the passenger window switch. The test lamp should turn ON when commanding the UP and DOWN states.
^ If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, replace the PDM.
9. 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. Ignition OFF, test for less than 1.0 ohm of resistance 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. If the circuit tests normal, replace the appropriate rear Window Switch.
4. Connect a test lamp between the Window Master Switch Up control circuit terminal A and ground.
5. Ignition ON, command the appropriate rear window UP with a scan tool. The test lamp should illuminate during the command.
^ If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
6. Connect a test lamp between the Window Master Switch Down control circuit terminal C and ground.
7. Ignition ON, command the appropriate rear window DOWN with a scan tool. The test lamp should illuminate during the command.
^ If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM.
8. Place the window lockout switch in the Off position.
9. Connect a test lamp between the Window Master Switch Lockout control circuit terminal D and ground. The test lamp should not illuminate.
^ If the test lamp illuminates, repair a short to voltage in the Window Master Switch Lockout control circuit. If the circuit tests normal, replace the BCM.
10. Ignition OFF, reconnect the appropriate rear Window Switch.
11. Ignition OFF, disconnect the harness connector at the appropriate rear window motor.
12. Ignition OFF, test for less than 1.0 ohm of resistance 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 circuits test normal, replace the appropriate rear Window Switch.
13. Ignition OFF, test for less than 1.0 ohm of resistance 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 circuits test normal, replace the appropriate rear Window Switch.
14. Connect a test lamp between control circuit terminal A and control circuit terminal B.
15. Ignition ON, command the appropriate rear window UP and DOWN by pressing the appropriate rear Window Switch. The test lamp should turn ON when commanding the UP and DOWN states.
^ If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, replace the appropriate rear Window Switch.
16. Ignition ON, using a scan tool command the appropriate rear window UP and DOWN. The test lamp should turn ON when commanding the UP and DOWN states.
^ If the test lamp remains OFF during either of the commands, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
17. If all circuits test normal, test or replace the appropriate rear window motor.
Component Testing
Window Motor (Rear and RPO AXE Passenger)
1. 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 appropriate window motor should perform the UP or DOWN function.
^ If the function does not perform as specified, replace the appropriate window motor.
2. Reverse the jumper wires; the appropriate window motor should perform the DOWN or UP function.
^ If the function does not perform as specified, replace the appropriate window motor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
* Door Window Regulator Motor Replacement
* Door Lock and Side Window Switch Replacement - Driver Side (with RPO AXE or AXC) Door Lock and Side Window Switch Replacement - Driver Side (Outlook only with RPO AXA)
* Door Lock and Side Window Switch Replacement - Passenger Side (Outlook with RPO AXA) Door Lock and Side Window Switch Replacement - Passenger Side (with RPO AXE or AXC) Door Lock and Side Window Switch Replacement - Passenger Side (Enclave with RPO AXE or AXC)
* Rear Side Door Window Switch Replacement (OUTLOOK) Rear Side Door Window Switch Replacement (Acadia) Rear Side Door Window Switch Replacement (Enclave)