Captiva

Power Windows Malfunction - Standard Function

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

Schematic Reference

Moveable Window Schematics : C145 → C140

Connector End View Reference

Component Connector End Views

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. Ignition ON, command the driver window UP and DOWN using the S79D window switch-driver. The driver window should perform the UP and DOWN functions.

⇒	If the driver window does not perform the UP or DOWN function, refer to Driver Window Malfunction.

2. Command the passenger and rear windows UP and DOWN using the appropriate switches on the S79D window switch-driver and by using the S79P window switch-passenger, S79LR window switch-left rear and S79RR window switch-right rear. Each window should perform the UP and DOWN functions from each switch.

⇒	If the passenger or a rear window does not perform as specified, refer to Passenger/Rear Window Malfunction.

3. Disable and enable the rear S79 window switch by pressing and depressing the lockout switch on the S79D window switch-driver. The S79LR window switch-left rear and S79RR window switch-right rear should be enabled and disabled when changing between the commanded states.

⇒	If the S79LR window switch-left rear and S79RR window switch-right rear continue to function while disabled, refer to Lockout Switch Malfunction.

1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
2. Test for less than 2 Ω between the ground circuit terminal listed below and ground:

•	Ground terminal P (left hand drive)

•	Ground terminal L (right hand drive)

⇒	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 ignition circuit terminal listed below and ground:

•	Ignition terminal K (left hand drive)

•	Ignition terminal R (right hand drive)

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

4. Ignition OFF, connect the harness connector at the S79D window switch-driver.
5. Disconnect the harness connector at the M74D window motor-driver.
6. Test for less than 5 Ω between the control circuit terminal 1 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 S79D window switch-driver.

7. Test for less than 5 Ω between the control circuit terminal 2 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 S79D window switch-driver.

8. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 2.
9. Ignition ON, command the driver window UP and DOWN by toggling the S79D window switch-driver between the UP and DOWN positions. 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 circuit tests normal, test or replace the S79D window switch-driver.

10. If all circuits test normal, test or replace the M74D window motor-driver.

Passenger/Rear Window Malfunction

1. Ignition OFF, disconnect the harness connector at the S79D window switch-driver.
2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal G and ground.

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

3. Ignition OFF, connect the harness connector at the S79D window switch-driver and disconnect the harness connector at the appropriate passenger or rear S79 window switch.

Note: Verify the windows are enabled by checking the window lockout switch on the S79D window switch-driver.

4. Ignition ON, verify that a test lamp illuminates between the control circuit terminal B and ground.

⇒	If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the S79D window switch-driver.

5. Ignition OFF, test for less than 5 Ω between the signal circuit terminal A and ground.

⇒	If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the S79D window switch-driver.

6. Test for less than 5 Ω between the signal circuit terminal D and ground.

⇒	If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the S79D window switch-driver.

7. Connect a test lamp between the signal circuit terminal A and the signal circuit terminal D.
8. Ignition ON, command the window UP and DOWN by toggling the appropriate window switch on the S79D window switch-driver between the UP and DOWN positions. The test lamp should illuminate when commanding the UP and DOWN states.

⇒	If the test lamp does not illuminate during either of the commands, test either signal circuit for a short to ground. If the circuits test normal, test or replace the S79D window switch-driver.

9. Ignition OFF, connect the harness connector at the S79 window switch and disconnect the harness connector at the appropriate passenger or rear M74 window motor.
10. Test for less than 5 Ω between the control circuit terminal 1 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 S79 window switch.

11. Test for less than 5 Ω between the control circuit terminal 2 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 S79 window switch.

12. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 2.
13. Ignition ON, command the window UP and DOWN by toggling the window switch between the UP and DOWN positions. The test lamp should illuminate when commanding the UP and DOWN states.

⇒	If the test lamp does not illuminate during either of the commands, test either control circuit for a short to ground. If the circuits test normal, test or replace the S79 window switch.

14. If all circuits test normal, test or replace the M74 window motor.

Lockout Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate rear S79 window switch.
2. Connect a test lamp between the control circuit terminal B and ground.
3. Ignition ON, command the rear window lockout ON and OFF by pressing and depressing the lockout switch on the S79D window switch-driver. The test lamp should turn ON and OFF when changing between the commanded states.

⇒	If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the S79D window switch-driver.

⇒	If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the S79D window switch-driver.

4. If all circuits test normal, test or replace the rear S79 window switch.

Passenger/Rear Window Switch

1. Ignition OFF, disconnect the harness connector at the appropriate passenger or rear S79 window switch.
2. Test for infinite resistance between the control terminal E and terminal H.

⇒	If less than the specified value, replace the S79 window switch.

3. Test for less than 2 Ω between the control terminal A and control terminal E with the switch in the UP position.

⇒	If greater than the specified range, replace the S79 window switch.

4. Test for less than 2 Ω between the control terminal D and control terminal H with the switch in the DOWN position.

⇒	If greater than the specified range, replace the S79 window switch.

Window Motor

1. Ignition OFF, disconnect the harness connector at the appropriate M74 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 M74 window motor should perform the UP and DOWN functions.

⇒	If it does not perform as specified, replace the M74 window motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.