Power Windows Inoperative - All (Coupe)

Power Windows Inoperative - All (Coupe)

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

Circuit/System Description

The power window system will operate any time the ignition is the ACC or RUN position. The power window system will also operate whenever the body control module (BCM) is in Accessory Delay Module mode. The driver power window switch contains individual window switches for each of power windows. All windows may be controlled up and down from the driver power window switch. The individual passenger power window switches will only control the up and down operation of their respective power window.

Each power window contains a reversible power window motor. The direction the window travels is dependent upon the polarity of the supply voltage. By reversing polarity of the supply voltage the window motor will move up or down. Each power window motor is internally circuit breaker protected.

Battery voltage is supplied to the power window switch through the accessory voltage supply circuit. The power window switch also receives a constant ground source. The power window motor control circuits are connected to ground through the normally closed up and down contacts of the power window switch. When the power switch is placed in the down position, the power window motor down control circuit is switched to 12 volts and is applied to the down side of the power window motor. Since the other side of the power motor is connected to ground through the normally closed contacts of the up switch, the window travels down. By placing the power window switch in the up position, the polarity of the power window motor is reversed and the window travels up.

The driver's window switch has an express-down feature that allows the window to be lowered completely without holding the switch. The switch is labeled AUTO. Press the bottom of the switch part way and release it and the driver's window will open a small amount. Press the switch all the way down and release it and the window will go completely down automatically.

To stop the window while it is lowering, press and release the top of the switch.

Circuit/System Verification

1. Ignition ON, command the appropriate door window UP and DOWN by pressing the appropriate window switch. Observe the operation of the appropriate door window.
2. Ignition ON, command the express down function door window by pressing Auto on the Driver's window switch past the first detent and release. The Driver's window should roll completely down.

• If both rear windows are inoperative, test or replace the Driver Window Switch.

Circuit/System Testing

1. Ignition OFF, disconnect the B+ harness connector at the Driver Window Switch.
2. Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal D 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 E and ground.

• If the test lamp does not illuminate, test the B+ circuit for an open/high resistance. If the PWR WNDW fuse is open, test the circuit terminal C for a short to ground.
• If all circuits test normal, test or replace the Driver Window Switch.

4. Ignition OFF, connect the harness connector at the Driver Window Switch.
5. Ignition OFF, disconnect the Passenger Window Switch.
6. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal and ground.

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

7. Ignition OFF, test for less than 1 ohm of resistance 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, replace the Driver Window Switch

8. Ignition OFF, test for less than 1 ohm of resistance 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, replace the Driver Window switch.

9. Connect a test lamp between control circuit terminal H and control circuit terminal D.
10. Ignition ON, command the passenger door window UP and DOWN by pressing the passenger window control on the Driver Window Switch. The test lamp should illuminate during either of the commands.

• If the test lamp remains OFF, test for a short to ground or open/high resistance on either control circuit. If all circuits test normal, test or replace the Driver Window Switch.

11. Ignition OFF, reconnect the Passenger Window Switch.
12. Ignition OFF, disconnect the harness connector at the appropriate Window Motor.
13. Ignition OFF, test for less than 1 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 the circuit tests normal, test or replace the appropriate window switch.

14. Ignition OFF, test for less than 1 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 the circuit tests normal, test or replace the appropriate window switch.

15. Connect a test lamp between control circuit terminal A and control circuit terminal B.
16. Ignition ON, command the appropriate window UP and DOWN by pressing the appropriate 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 all circuits test normal, test or replace the appropriate Window Switch.

17. If all circuits test normal, test or replace the appropriate 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 signal terminals A and B and the B+ circuit terminal E with the passenger window switch in the INACTIVE position.

• If less than infinite resistance, replace the Driver Window switch.

3. Test for less than 2 ohms of resistance between the signal terminal A and the B+ circuit terminal E with the passenger window switch in the UP position.

• If greater than 2 ohms, replace the Driver Window switch.

4. Test for less than 2 ohms of resistance between the signal terminal B and the B+ circuit terminal E with the passenger window switch in the DOWN position.

• If greater than 2 ohms, replace the Driver Window switch.

5. Test for infinite resistance between the signal terminals F and H and the B+ circuit terminal E with the driver window switch in the INACTIVE position.

• If less than infinite resistance, replace the Driver Window switch.

6. Test for less than 2 ohms of resistance between the signal terminal F and the B+ circuit terminal E with the driver window switch in the UP position.

• If greater than 2 ohms, replace the Driver Window switch.

7. Test for less than 2 ohms of resistance between the signal terminal H and the B+ circuit terminal E with the driver window switch in the DOWN position.
8. If greater than 2 ohms, 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 signal terminals G and F and the B+ circuit terminal with the switch in the INACTIVE position.

• If less than infinite resistance, replace the appropriate passenger Window switch.

3. Test for less than 2 ohms of resistance between the signal terminal G and the B+ circuit terminal with the switch in the UP position.

• If greater than 2 ohms, replace the appropriate passenger Window switch.

4. Test for less than 2 ohms of resistance between the signal terminal F and the B+ circuit terminal with the switch in the DOWN position.

• If greater than 2 ohms, replace the appropriate passenger Window switch.

Window Motor
1. Install a 30-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.

* Front Side Door Window Switch Replacement - Left Side
* Front Side Door Window Switch Replacement - Right Side
* Front Side Door Window Regulator Replacement (Manual Regulator) Front Side Door Window Regulator Replacement (Power Regulator)