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 power window system will operate any time the ignition is the ACC or RUN position. The driver power window switch contains individual window switches for the passenger power window. Both windows may be controlled up and down from the driver power window switch. The passenger power window switches will only control the up and down operation of the passenger 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 ignition 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 V 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.
Reference Information
Schematic Reference
Moveable Window Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
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. Ignition ON.
2. Verify the driver window performs the UP and DOWN functions.
• If the driver window does not perform the UP or DOWN functions
Refer to Circuit/System Testing - Driver Window Inoperative
• If the driver window performs the UP and DOWN functions
3. Verify the Window Motor-Passenger performs the UP and DOWN functions at both the Window Switch-Driver and Window Switch-Passenger.
• If the Window Motor-Passenger is inoperative from both the Window Switch-Driver and Window Switch-Passenger
Refer to Circuit/System Testing - Passenger Window Inoperative From Both Switches.
• If the Window Motor-Passenger is inoperative from the passenger window switch only
Refer to Circuit/System Testing - Passenger Window Switch Inoperative.
• If the Window Motor-Passenger is inoperative from the Window Switch-Driver only
Test or replace the Window Switch-Driver.
• If the Window Motor-Passenger performs the UP and DOWN functions at both switches
4. All OK.
Circuit/System Testing
Driver Window Inoperative
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the Window Switch-Driver. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal F and ground.
• If 10 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
3. Ignition ON.
4. Verify a test lamp illuminates between the ignition circuit terminal C and ground.
• If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF.
2. Test for less than 2 ohms in the ignition circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, refer to Retained Accessory Power Malfunction Retained Accessory Power Malfunction.
• If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF.
2. Test for infinite resistance between the ignition circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for infinite resistance between the control circuits listed below and ground:
* Control circuit terminal G
* Control circuit terminal H
* Control circuit terminal A
* Control circuit terminal D
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the Window Switch-Driver.
• If the test lamp illuminates
5. Ignition OFF and all vehicle systems OFF, connect the harness connector at the Window Switch-Driver and disconnect the harness connector at the Window Motor-Driver. It may take up to 2 minutes for all vehicle systems to power down.
6. Test for less than 10 ohms between the control circuit terminal A and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the Window Switch-Driver.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the Window Switch-Driver.
• If less than 10 ohms
7. Test for less than 10 ohms between the control circuit terminal B and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the Window Switch-Driver.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the Window Switch-Driver.
• If less than 10 ohms
8. Connect a test lamp between control circuit terminal A and control circuit terminal B, ignition ON.
9. Verify the test lamp turns ON when commanding the UP and DOWN states with the Window Switch-Driver.
• If the test lamp remains OFF during either of the commands
1. Ignition OFF, disconnect the harness connector at the Window Switch-Driver.
2. Test for infinite resistance between each control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the Window Switch-Driver.
• If the test lamp turns ON during each of the commands
10. Test or replace the Window Motor-Driver.
Passenger Window Inoperative From Both Switches
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the Window Switch-Passenger. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the control circuit terminal D and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the Window Switch-Driver.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the Window Switch-Driver.
• If less than 10 ohms
3. Test for less than 10 ohms between the control circuit terminal H and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the Window Switch-Driver.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the Window Switch-Driver.
• If less than 10 ohms
4. Connect a test lamp between the control circuit terminal D and control circuit terminal H, ignition ON.
5. Verify the test lamp turns ON when commanding the UP and DOWN functions with the Window Switch-Driver.
• If the test lamp remains OFF during either of the commands
1. Ignition OFF, disconnect the harness connector at the Window Switch-Driver.
2. Test for infinite resistance between each control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the Window Switch-Driver.
• If the test lamp turns ON during each of the commands
6. Ignition OFF and all vehicle systems OFF, connect the harness connector at the Window Switch-Passenger and disconnect the harness connector at the Window Motor-Passenger. It may take up to 2 minutes for all vehicle systems to power down.
7. Test for less than 10 ohms between the control circuit terminal A and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the Window Switch-Passenger.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the Window Switch-Passenger.
• If less than 10 ohms
8. Test for less than 10 ohms between the control circuit terminal B and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the Window Switch-Passenger.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the Window Switch-Passenger.
• If less than 10 ohms
9. Connect a test lamp between control circuit terminal A and control circuit terminal B, ignition ON.
10. Verify the test lamp turns ON when commanding the UP and DOWN functions with the Window Switch-Passenger.
• If the test lamp remains OFF during either of the commands
1. Ignition OFF, disconnect the harness connector at the Window Switch-Passenger.
2. Test for infinite resistance between each control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the Window Switch-Passenger.
• If the test lamp turns ON during each of the commands
11. Test or replace the Window Motor-Passenger.
Passenger Window Switch Inoperative
1. Ignition OFF, disconnect the harness connector at the Window Switch-Passenger, ignition ON
2. Verify a test lamp illuminates between the ignition circuit terminal A and ground.
• If the test lamp does not illuminate
1. Ignition OFF.
2. Test for less than 2 ohms in the ignition circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse.
• If the test lamp illuminates
3. Test or replace the Window Switch-Passenger.
Component Testing
Window Motor
1. Ignition OFF, disconnect the harness connector at the appropriate Window Motor.
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 Window Motor should perform the UP and DOWN functions.
• If the Window Motor does not perform the UP and DOWN functions
Replace the Window Motor.
• If the Window Motor performs the UP and DOWN functions
3. All OK
Driver Window Switch
1. Ignition OFF, disconnect the harness connector at the Window Switch-Driver.
2. Test for infinite resistance between the terminals listed below with the switch in the open position:
* Ignition terminal C and control terminal A
* Ignition terminal C and control terminal D
* Ignition terminal C and control terminal G
* Ignition terminal C and control terminal H
• If less than infinite resistance
Replace the Window Switch-Driver.
• If infinite resistance
3. Test for less than 3 ohms between the terminals listed below with the switch in the open position:
* Ground terminal F and control terminal A
* Ground terminal F and control terminal D
* Ground terminal F and control terminal G
* Ground terminal F and control terminal H
• If 3 ohms or greater
Replace the Window Switch-Driver.
• If less than 3 ohms
4. Test for less than 3 ohms between the terminals listed below with the switch in the Up position.
* Driver window - ignition terminal C and control terminal G
* Passenger window - ignition terminal C and control terminal A
• If 3 ohms or greater
Replace the Window Switch-Driver.
• If less than 3 ohms
5. Test for less than 3 ohms between the terminals listed below with the switch in the Down position:
* Driver window - ignition terminal C and control terminal H
* Passenger window - ignition terminal C and control terminal D
• If 3 ohms or greater
Replace the Window Switch-Driver.
• If less than 3 ohms
6. All OK
Passenger Window Switch
1. Ignition OFF, disconnect the harness connector at the Window Switch-Passenger.
2. Test for infinite resistance between the terminals listed below with the switch in the open position:
* Ignition terminal A and control terminal G
* Ignition terminal A and control terminal F
• If less than infinite resistance
Replace the Window Switch-Passenger.
• If infinite resistance
3. Test for less than 3 ohms between the control terminals listed below with the switch in the open position:
* Control terminal H and control terminal G
* Control terminal D and control terminal F
• If 3 ohms or greater
Replace the Window Switch-Passenger.
• If less than 3 ohms
4. Test for less than 3 ohms between the ignition terminal A and the control terminal G with the switch in the Up position.
• If 3 ohms or greater
Replace the Window Switch-Passenger.
• If less than 3 ohms
5. Test for less than 3 ohms between the ignition terminal A and the control terminal F with the switch in the Down position.
• If 3 ohms or greater
Replace the Window Switch-Passenger.
• If less than 3 ohms
6. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
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