Fixed and Moveable Window System Buick Encore I

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

DTC Descriptors

For symptom byte information, refer to Symptom Byte List .

Diagnostic Fault Information

Circuit/System Description

The HVAC control module monitors the voltage level on the supply voltage circuit of the rear defog relay. The voltage level should be low while the rear defog relay is de-energized. The voltage will be near system voltage when the HVAC control module energizes the rear defog relay.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

B0283 02

When the HVAC control module detects a short to ground in the relay control circuit for 1 second or greater

B0283 05

When the HVAC control module detects a short to battery or an open/high resistance in the relay control circuit or the relay ground circuit for 1 second or greater.

Action Taken When the DTC Sets

1. If B0283 02 is current, the rear window defogger grid will be inoperative.
2. If B0283 05 is current, the rear window defogger grid will operate continuously.

Conditions for Clearing the DTC

1. The DTC will be current for as long as the fault is present.
2. When the fault is no longer present, the DTC will be a history DTC.
3. A history DTC will clear after 50 ignition cycles.

Reference Information

Schematic Reference

Defogger Schematics (Encore) , Defogger Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Rear Window Defogger Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Engine Running.
2. Verify the E18 Rear Defogger Grid turns ON and OFF pressing the rear window defogger switch. If the E18 Rear Defogger Grid does not turn ON or OFF Refer to Circuit/System Testing If the E18 Rear Defogger Grid turns ON and OFF
3. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the X2 harness connector at the X50A Fuse Block-Underhood. 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 C5 and ground. If 10 ohms or greater Ignition OFF. 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. Connect the X2 harness connector at the X50A Fuse Block-Underhood. Disconnect the X2 harness connector at the K33 HVAC Control Module, ignition ON.
4. Verify the E18 Rear Defogger Grid is not activated. If the E18 Rear Defogger Grid is activated Ignition OFF, disconnect the X2 harness connector at the X50A Fuse Block-Underhood. Test for less than 1 V between the K33 HVAC Control Module control circuit terminal 19 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the X50A Fuse Block-Underhood. If the E18 Rear Defogger Grid is not activated
5. Connect a 3 A fused jumper wire between the control circuit terminal 19 and B+.
6. Verify the E18 Rear Defogger Grid activates. If the E18 Rear Defogger Grid does not activate Ignition OFF, remove the jumper wire, disconnect the X2 harness connector at the X50A Fuse Block-Underhood, ignition ON. Test for infinite resistance between the K33 HVAC Control Module control circuit terminal 19 and ground. If less than Infinite resistance, repair the short to ground on the circuit. If infinite resistance 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 X50A Fuse Block-Underhood. If the E18 Rear Defogger Grid activates
7. Replace the K33 HVAC Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Compartment Fuse Block Replacement»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
2. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for HVAC control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

For symptom byte information refer to: Symptom Byte List

The driver window motor supplies 12V signal circuits to the driver window switch, when a window switch has been activated, a switch closes providing a ground to the appropriate signal circuit causing the voltage to drop to 0V. The driver window motor will detect the voltage drop in the signal circuit and will command the window to move in the desired direction.

The driver window master control switch also contains control switches for the passenger, left rear and right rear window functions. When a window switch is pressed, a serial data message is sent to the body control module (BCM). The BCM examines the request and checks for messages from other power window motors that may prohibit window movement. If no prohibitive messages have been received, the BCM will send a serial data message to the appropriate passenger or rear window switch which will perform the command as requested.

Battery voltage must be between 9-16 V.

B316B 00

The BCM has detected a control switch on the driver window master switch has been active for greater than 60 seconds.

B316B 02

The driver window motor has detected the driver window master switch is active for greater than 60 seconds.

B316B 39

The driver window motor has detected an internal failure within the driver window switch

B317A 02

The BCM has detected the passenger window switch is active for greater than 60 seconds.

B317A 39

The BCM has detected an internal failure within the passenger window switch

B318A 02

The BCM has detected the left rear window switch is active for greater than 60 seconds

B318A 39

The BCM has detected an internal failure within the left rear window switch

B319A 02

The BCM has detected the right rear window switch is active for greater than 60 seconds

B319A 39

The BCM has detected an internal failure within the right rear window switch

The affected power window will malfunction.

B316B 00, B316B 02, B317A 02, B318A 02, B319A 02

1. The DTC will be current for as long as the fault is present.
2. The DTC will change from current to history when the fault is no longer present.
3. A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

B316B 39, B317A 39, B318A 39, B319A 39

If the DTC is current, the affected window switch must be replaced before the DTC can be cleared.

Schematic Reference

Moveable Window Schematics (Encore) , Moveable Window Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON.
2. Verify the scan tool parameters listed below change when pressing and pulling the switches for the passenger, left rear and right rear window on the driver window master control; Left Rear Main Control Down Switch - Inactive and Active Left Rear Main Control Express Switch - Inactive and Active Left Rear Main Control Up Switch - Inactive and Active Right Rear Main Control Down Switch - Inactive and Active Right Rear Main Control Express Switch - Inactive and Active Right Rear Main Control Up Switch - Inactive and Active Front Passenger Main Control Down Switch - Inactive and Active Front Passenger Main Control Express Switch - Inactive and Active Front Passenger Main Control Up Switch - Inactive and Active If any parameter does not change Replace the S79D Window Switch-Driver. If the parameters change
3. Verify the scan tool parameters listed below change when pressing and pulling the driver window control switch on the driver window master control: Driver Window Main Control Down Switch - Inactive and Active Driver Window Main Control Up Switch - Inactive and Active Driver Window Main Control Express Switch - Inactive and Active If any parameter does not change Refer to Circuit/System Testing. If all the parameters change
4. Verify the scan tool parameters listed below change when pressing and pulling the S79P Window Switch-Passenger, the S79LR Window Switch-Left Rear and the S79RR Window Switch-Right Rear. Passenger Window Switch at Door - Inactive, Up, Down, Express Down Left Rear Window Switch at Door - Inactive, Up, Down, Express Down Right Rear Window Switch at Door - Inactive, Up, Down, Express Down If any parameter does not change Test or replace the appropriate passenger or rear S79 Window Switch If all the parameters change
5. All OK.

1. Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver, ignition ON
2. Verify the scan tool Driver Window Main Control Down Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 3 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
3. Install a 3 A fused jumper wire between the signal circuit terminal 3 and ground.
4. Verify the scan tool Driver Window Main Control Down Switch parameter is Active If not Active Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit terminal 3 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
5. Verify the scan tool Driver Window Main Control Up Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 6 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
6. Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
7. Verify the scan tool Driver Window Main Control Up Switch parameter is Active If not Active Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit 6 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
8. Verify the scan tool Driver Window Main Control Express Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 2 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
9. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground.
10. Verify the scan tool Driver Window Main Control Express Switch parameter is Active If not Active Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit 2 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
11. Test or replace the S79D Window Switch-Driver.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Rear Side Door Window Switch Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Front Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
3. «Front Side Door Window Switch Replacement (Driver Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Driver Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

For symptom byte information, refer to Symptom Byte List .

The window motors supply 12 V signal circuits to their respective window switches, when a window switch has been activated, a switch closes providing a ground to the appropriate signal circuit causing the voltage to drop to 0 V. The window motor will detect the voltage drop in the signal circuit and will command the window to move in the desired direction.

The driver window master control switch also contains control switches for the passenger, left rear and right rear window functions. When a window switch is pressed, a serial data message is sent to the body control module (BCM). The BCM examines the request and checks for messages from other power window motors that may prohibit window movement. If no prohibitive messages have been received, the BCM will send a serial data message to the passenger window motor or to the appropriate rear window motor which will perform the command as requested.

Battery voltage must be between 9-16 V.

B316B 00

The BCM has detected a control switch on the driver window master switch has been active for greater than 60 seconds.

B316B 02

The driver window motor has detected the driver window master switch is active for greater than 60 seconds.

B317A 02

The passenger window motor has detected the passenger Window Switch is active for greater than 60 seconds.

B318A 02

The left rear window motor has detected the left rear Window Switch is active for greater than 60 seconds

B319A 02

The right rear window motor has detected the right rear Window Switch is active for greater than 60 seconds

B316B 39, B317A 39, B318A 39, B319A 39

The window motor has detected an internal failure within the affected door switch

The affected power window will malfunction.

B316B 00, B316B 02, B317A 02, B318A 02, B319A 02

1. The DTC will be current for as long as the fault is present.
2. The DTC will change from current to history when the fault is no longer present.
3. A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

B316B 39, B317A 39, B318A 39, B319A 39

If the DTC is current, the affected Window Switch must be replaced before the DTC can be cleared.

Schematic Reference

Moveable Window Schematics (Encore) , Moveable Window Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON.
2. Verify the scan tool parameters listed below change when pressing and pulling the switches for the passenger, left rear and right rear window on the driver window master control; Left Rear Main Control Down Switch - Inactive and Active Left Rear Main Control Express Switch - Inactive and Active Left Rear Main Control Up Switch - Inactive and Active Right Rear Main Control Down Switch - Inactive and Active Right Rear Main Control Express Switch - Inactive and Active Right Rear Main Control Up Switch - Inactive and Active Front Passenger Main Control Down Switch - Inactive and Active Front Passenger Main Control Express Switch - Inactive and Active Front Passenger Main Control Up Switch - Inactive and Active If any parameter does not change Replace the S79D Window Switch-Driver. If the parameters change
3. Verify the scan tool parameters listed below change when pressing and pulling the driver window control switch on the driver window master control: Driver Window Main Control Down Switch - Inactive and Active Driver Window Main Control Up Switch - Inactive and Active Driver Window Main Control Express Down Switch - Inactive and Active Driver Window Main Control Express Up Switch - Inactive and Active If any parameter does not change Refer to Circuit/System Testing - Driver Window Switch Malfunction. If all the parameters change
4. Verify the scan tool parameters listed below change when pressing and pulling the S79P Window Switch-Passenger, the S79LR Window Switch-Left Rear and the S79RR Window Switch-Right Rear. Passenger Window Switch at Door - Inactive, Up, Express Up, Down, Express Down Left Rear Window Switch at Door - Inactive, Up, Express Up, Down, Express Down Right Rear Window Switch at Door - Inactive, Up, Express Up, Down, Express Down If any parameter does not change Refer to Circuit/System Testing - Passenger/Rear Window Switch Malfunction. If all the parameters change
5. All OK.

Driver Window Switch Malfunction

1. Ignition OFF, disconnect the X1 harness connector at the S79D Window Switch-Driver, ignition ON
2. Verify the scan tool Driver Window Main Control Down Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 6 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
3. Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
4. Verify the scan tool Driver Window Main Control Down Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit terminal 6 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
5. Verify the scan tool Driver Window Main Control Up Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 2 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
6. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground.
7. Verify the scan tool Driver Window Main Control Up Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit terminal 2 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
8. Verify the scan tool Driver Window Main Control Express Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 3 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
9. Install a 3 A fused jumper wire between the signal circuit terminal 3 and ground.
10. Verify the scan tool Driver Window Main Control Express Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit terminal 3 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
11. Test or replace the S79D Window Switch-Driver.

Passenger/Rear Window Switch Malfunction

1. Ignition OFF, disconnect the X1 harness connector at the appropriate passenger or rear S79 Window Switch, ignition ON
2. Verify the appropriate scan tool Window Switch at Door parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74 Window Motor. Test for infinite resistance between the signal circuit listed below and ground: S79 Window Switch - signal circuit terminal 6 S79 Window Switch - signal circuit terminal 8 If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74 Window Motor. If Inactive
3. Install a 3 A fused jumper wire between the circuit terminal listed below and ground: S79P Window Switch-Passenger - signal circuit terminal 6 S79LR Window Switch-Left Rear - signal circuit terminal 8 S79RR Window Switch-Right Rear - signal circuit terminal 8
4. Verify the scan tool Window Switch at Door parameter is Up If not Up Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74 Window Motor, ignition ON. Test for less than 1 V between the S79 Window Switch signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74 Window Motor. If Up
5. Install a 3 A fused jumper wire between the signal circuit terminal listed below and ground: S79P Window Switch-Passenger - signal circuit terminal 8 S79LR Window Switch-Left Rear - signal circuit terminal 6 S79RR Window Switch-Right Rear - signal circuit terminal 6
6. Verify the scan tool Window Switch at Door parameter is Down If not Down Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74 Window Motor, ignition ON. Test for less than 1 V between the S79 Window Switch signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74 Window Motor. If Down
7. Test for greater than 10 V between the signal circuit terminal 7 and ground. If less than 10 V Ignition OFF, disconnect the harness connector at the M74 Window Motor. Test for infinite resistance between the S79 Window Switch signal terminal 7 circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance on the circuit. If less than 2 ohms, replace the M74 Window Motor. If greater than 10 V
8. Test or replace the passenger or rear S79 Window Switch.

Perform the Diagnostic Repair Verification after completing the repair

1. «Front Side Door Window Switch Replacement (Driver Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Driver Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Rear Side Door Window Switch Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
3. «Rear Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
4. «Front Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The driver window motor is supplied with B+ voltage which is used to power the motor and also used as a reference voltage within the logic circuit. When the driver window switch is pressed, a switch is closed causing the reference voltage in the appropriate circuit in the window motor to drop, the window motor responds by moving the window in the direction commanded.

Battery voltage must be between 9-16 V.

The driver window motor has detected the driver left front window switch is active for greater than 60 seconds.

The driver power window will malfunction.

1. The DTC will be current for as long as the fault is present.
2. The DTC will change from current to history when the fault is no longer present.
3. A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

Schematic Reference

Moveable Window Schematics (Encore) , Moveable Window Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON.
2. Verify the scan tool parameters listed below change when pressing and pulling the driver window control switch on the driver window master control: Driver Window Main Control Down Switch - Inactive and Active Driver Window Main Control Up Switch - Inactive and Active Driver Window Main Control Express Switch - Inactive and Active If any parameter does not change Refer to Circuit/System Testing If all the parameters change
3. All OK.

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S79D 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 11 and ground. If 10 ohms or greater Ignition OFF. 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 the scan tool Driver Window Main Control Down Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 8 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 8 and the ground circuit terminal 11.
6. Verify the scan tool Driver Window Main Control Down Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit terminal 8 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
7. Verify the scan tool Driver Window Main Control Up Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 9 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
8. Install a 3 A fused jumper wire between the signal circuit terminal 9 and the ground circuit terminal 11.
9. Verify the scan tool Driver Window Main Control Up Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit 9 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
10. Verify the scan tool Driver Window Main Control Express Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 10 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
11. Install a 3 A fused jumper wire between the signal circuit terminal 10 and the ground circuit terminal 11.
12. Verify the scan tool Driver Window Main Control Express Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit 10 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
13. Test or replace the S79D Window Switch-Driver.

Component Testing

Driver Window Switch

1. Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver.
2. Test for infinite resistance between the terminals listed below with the switch in the open position: Ground terminal 11 and control terminal 7 Ground terminal 11 and control terminal 8 Ground terminal 11 and control terminal 9 Ground terminal 11 and control terminal 10 If less than infinite resistance Replace the S79D Window Switch-Driver. If infinite resistance
3. Test for less than 3 ohms between the ground terminal 11 and the control terminal 9 with the switch in the Up position. If 3 ohms or greater Replace the S79D Window Switch-Driver. If less than 3 ohms
4. Test for less than 3 ohms between the ground terminal 11 and the control terminal 8 with the switch in the Down position. If 3 ohms or greater Replace the S79D Window Switch-Driver. If less than 3 ohms
5. All OK

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Front Side Door Window Switch Replacement (Driver Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Driver Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

For symptom byte information, refer to Symptom Byte List .

The body control module (BCM) monitors, receives and transmits serial data to each of the doors switches and window motors. When a window switch has been activated on the driver window switch, a signal is sent to the BCM which sends a signal to the appropriate window motor and the window motor will move in the direction commanded.

1. The ignition switch is in the ON position.
2. Battery voltage must be between 9-16 V.

B3205 00, B3210 00, B3215 00, B3220 00

The BCM has detected that the compatibility code stored in the affected window motor does not match the compatibility code stored in the BCM.

B3205 39, B3210 39, B3215 39, B3220 39

An internal malfunction has been detected by the BCM in the power window motor while commanding the window UP or DOWN.

B3205 42, B3210 42, B3215 42, B3220 42

The BCM will automatically attempt to download the calibration program into the appropriate window motor (As will occur when the window motor has been replaced), if the first calibration program fails to load, the BCM will attempt to download the calibration program a second time. If this download fails, the BCM will set appropriate DTC.

B3205 4B, B3210 4B, B3215 4B, B3220 4B

The BCM detects that a window motor is "not normalized" which will occur under the following conditions

1. When the battery has been disconnected
2. When the battery has been replaced
3. When the door wiring harness has been disconnected
4. When the window motor has been disconnected

B3205 00, B3205 39, B3205 42, B3210 00, B3210 39, B3210 42, B3215 39, B3220 39

The affected motor will be inoperative.

B3205 4B, B3210 4B, B3215 4B, B3220 4B

The affected motor will not perform the express up or express down functions and the driver information center will display Open, then Close Driver Window or will display Open, then Close Passenger Window.

B3205 00, B3210 00, B3215 00, B3220 00

Installing a compatible window motor for that specific make and model vehicle.

B3205 39, B3210 39, B3215 39, B3220 39

The appropriate window motor must be replaced before the DTC can be cleared.

B3205 42, B3210 42, B3215 42, B3220 42

The appropriate window motor must be replaced before the DTC can be cleared.

B3205 4B, B3210 4B, B3215 4B, B3220 4B

The appropriate window motor must be normalized before the DTC can be cleared.

Schematic Reference

Moveable Window Schematics (Encore) , Moveable Window Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON.
2. Verify the driver, passenger, left rear and right rear window functions while commanding the Driver Window Motor, Passenger Window Motor, Left Rear Window Motor and Right Rear Window Motor Up and Down with a scan tool. If the Up and Down does not work Replace the appropriate M74 Window Motor. If the Up and Down works
3. Verify the driver, passenger, left rear and right rear window performs the Express Up and Express Down functions with the driver window switch. If a window does not Express Up and Express Down Normalize the window motor, refer to «Window Motor Programming - Express Function»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) . If the window performs the Express Up and Express Down functions
4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Rear Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

Symptoms - Fixed and Moveable Windows

Important Preliminary Checks Before Starting

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) before using the symptom tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
2. Review the power window system operation or rear window defogger system operation in order to familiarize yourself with the system functions. Refer to the following: «Rear Window Defogger Description and Operation»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) «Power Windows Description and Operation»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the rear window defogger. Refer to «Checking Aftermarket Accessories»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Note. Inspect for proper installation of electrical components if an intermittent condition exists. Inspect for aftermarket theft deterrent devices, lights, and cellular phones. Ensure that no aftermarket equipment is connected to the class 2 circuit. If you can not locate an intermittent condition, a cellular phone signal may cause the condition. Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections . The problem may or may not turn ON the SERVICE VEHICLE SOON indicator or store a DTC. Do not use the symptom tables to diagnose intermittent conditions. The malfunction must be present in order to locate the problem.

Poor electrical connections or wiring cause most intermittent conditions. Perform a careful visual/physical check for the following conditions

1. Poor mating of the connector halves or a terminal not fully seated in the connector body
2. An improperly formed or damaged terminal
3. Reform or replace connector terminals in the problem circuit in order to ensure proper contact tension.
4. Poor terminal to wire connection requires removing the terminal from the connector body in order to perform the check.

Use a scan tool in order to help detect intermittent conditions. The scan tool has several features that can be used to locate an intermittent condition. The snapshot feature can capture and store data parameters within the scan tool when the malfunction occurs. This information can then be reviewed in order to see what caused the malfunction.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Rear Window Defogger Malfunction»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Power Windows Malfunction (AXG, AEF, AER)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Power Windows Malfunction (AXG, AED, AEQ)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Power Windows Malfunction (A55, A66 Without A33)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Power Windows Malfunction (A55, A66 With A33)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Power Windows Malfunction (AXG, A66, A33)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Battery positive voltage is supplied through a 30A fuse in the underhood fuse block, to the rear defogger relay switched input. When the rear window defogger switch is pressed, The HVAC control module commands the rear window defogger system by supplying voltage to the rear defogger relay coil. The rear defogger relay is energized and the defogger indicator is illuminated. With the relay energized, battery positive voltage is allowed from the relay switched input through the switch contacts and out the relay switched output to the rear window defogger grid.

Schematic Reference

Defogger Schematics (Encore) , Defogger Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Rear Window Defogger Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Engine running.
2. Verify the E18 Rear Defogger Grid turns ON and OFF pressing the rear window defogger switch. If the E18 Rear Defogger Grid does not turn ON and OFF Refer to Circuit/System Testing If the E18 Rear Defogger Grid turns ON and OFF
3. Verify the rear window defogger indicator turns ON and OFF when commanding the Illuminate All Indicators On and Off with a scan tool. If the rear window defogger indicator does not turn ON and OFF Replace the K33 HVAC Control Module. If the rear window defogger indicator turns ON and OFF
4. All OK.

1. Ignition OFF, and all vehicle systems OFF. Disconnect the X1 and X2 harness connectors at the E18 Rear Defogger Grid. 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 1 X2 and ground. If 10 ohms or greater Ignition OFF. 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. Connect a test lamp between the control circuit terminal 1 X1 and ground, Engine Running.
4. Verify the test lamp does not turn ON and OFF pressing the rear window defogger switch. If the test lamp turns ON and OFF Test or replace the E18 Rear Defogger Grid. If the test lamp does not turn ON and OFF
5. Ignition OFF, connect the X1 and X2 harness connectors at the E18 Rear Defogger Grid. Disconnect the X2 harness connector at the X50A Fuse Block-Underhood. It may take up to 2 minutes for all vehicle systems to power down.
6. Test for less than 10 ohms between the ground circuit terminal C5 and ground. If 10 ohms or greater Ignition OFF. 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
7. Ignition ON
8. Verify the E18 Rear Defogger Grid is not activated. If the E18 Rear Defogger Grid is activated Ignition OFF, disconnect the X1 harness connector at the E18 Rear Defogger Grid, ignition ON. Test for less than 1 V between the X50A Fuse Block-Underhood control circuit terminal A3 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, test or replace the E18 Rear Defogger Grid. If the E18 Rear Defogger Grid is not activated
9. Connect a 30A fused jumper wire between the control circuit terminal A3 and B+.
10. Verify the E18 Rear Defogger Grid activates. If the E18 Rear Defogger Grid does not activate Ignition OFF, remove the jumper wire, disconnect the X1 harness connector at the E18 Rear Defogger Grid, ignition ON. Test for infinite resistance between the control circuit and ground. If less than Infinite resistance, repair the short to ground on the circuit. If infinite resistance 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, test or replace the E18 Rear Defogger Grid. If the E18 Rear Defogger Grid activates
11. Ignition OFF, connect the X2 harness connector at the X50A Fuse Block-Underhood. Disconnect the X2 harness connector at the K33 HVAC Control Module, ignition ON.
12. Verify the E18 Rear Defogger Grid is not activated. If the E18 Rear Defogger Grid is activated Ignition OFF, disconnect the X2 harness connector at the X50A Fuse Block-Underhood. Test for less than 1 V between the K33 HVAC Control Module control circuit terminal 19 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the X50A Fuse Block-Underhood. If the E18 Rear Defogger Grid is not activated
13. Connect a 3 A fused jumper wire between the control circuit terminal 19 and B+.
14. Verify the E18 Rear Defogger Grid activates. If the E18 Rear Defogger Grid does not activate Ignition OFF, remove the jumper wire, disconnect the X2 harness connector at the X50A Fuse Block-Underhood, ignition ON. Test for Test for infinite resistance between the K33 HVAC Control Module control circuit terminal 19 and ground. If less than Infinite resistance, repair the short to ground on the circuit. If infinite resistance 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 X50A Fuse Block-Underhood. If the E18 Rear Defogger Grid activates
15. Replace the K33 HVAC Control Module.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Compartment Fuse Block Replacement»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
2. «Liftgate Window Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system__liftgate-window-replacement)
3. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for HVAC control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The window motors supply 12 V signal circuits to their respective window switches, when a window switch has been activated, a switch closes providing a ground to the appropriate signal circuit causing the voltage to drop to 0 V. The window motor will detect the voltage drop in the signal circuit and will command the window to move in the desired direction.

The driver window master control switch also contains control switches for the passenger, left rear and right rear window functions. When a window switch is pressed, a serial data message is sent to the body control module. The body control module examines the request and checks for messages from other power window motors that may prohibit window movement. If no prohibitive messages have been received, the body control module will send a serial data message to the passenger window motor or to the appropriate rear window motor which will perform the command as requested.

Diagnostic Aids

The loss of the express up and express down functions for the driver, passenger and rear windows may have occurred for the following reasons

1. The battery was disconnected
2. The battery was replaced
3. A door wiring harness was disconnected
4. A window motor was disconnected

The window motors will need to be normalized in order to restore the express functions, refer to Window Motor Programming - Express Function for the proper procedure.

Schematic Reference

Moveable Window Schematics (Encore) , Moveable Window Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON.
2. Verify the driver window functions while commanding the Driver Window Motor Up and Down with a scan tool. If the window does not move UP and DOWN as commanded Refer to Circuit/System Testing - Driver Window Motor Malfunction. If the window moves UP and DOWN as commanded
3. Verify the driver window moves while commanding the window UP, express UP, DOWN and express DOWN with the S79D Window Switch-Driver. If the driver window does not move UP or DOWN as commanded Refer to Circuit/System Testing - Driver Window Switch Malfunction. If the driver window does not express UP or express DOWN Normalize the driver window motor, refer to «Window Motor Programming - Express Function»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) . If after normalization, the driver window does not express UP or express DOWN Refer to Circuit/System Testing - Driver Window Switch Malfunction. If the driver window moves UP, express UP, DOWN and express DOWN as commanded
4. Verify the scan tool parameters listed below change when pressing and pulling the switches for the passenger, left rear and right rear window on the driver window master control; Left Rear Main Control Down Switch - Inactive and Active Left Rear Main Control Express Switch - Inactive and Active Left Rear Main Control Up Switch - Inactive and Active Right Rear Main Control Down Switch - Inactive and Active Right Rear Main Control Express Switch - Inactive and Active Right Rear Main Control Up Switch - Inactive and Active Front Passenger Main Control Down Switch - Inactive and Active Front Passenger Main Control Express Switch - Inactive and Active Front Passenger Main Control Up Switch - Inactive and Active If any parameter does not change Replace the S79D Window Switch-Driver. If the parameters change
5. Verify the passenger, left rear and right rear window move while commanding the Passenger Window Motor, Left Rear Window Motor, and Right Rear Window Motor Up and Down with a scan tool. If the window does not move UP and DOWN as commanded Refer to Circuit/System Testing - Window Motor Malfunction. If the window moves UP and DOWN as commanded
6. Verify the passenger and rear window moves while commanding the window UP, express UP, DOWN and express DOWN with the appropriate passenger or rear S79 Window Switch. If a passenger or rear window does not move UP or DOWN as commanded Refer to Circuit/System Testing - Passenger/Rear Window Switch Malfunction. If a passenger or rear window does not express UP or express DOWN Normalize the appropriate window motor, refer to «Window Motor Programming - Express Function»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) . If after normalization, a passenger or rear window does not express UP or express DOWN Refer to Circuit/System Testing - Passenger/Rear Window Switch Malfunction. If the passenger and rear window moves UP, express UP, DOWN and express DOWN as commanded
7. All OK.

Window Motor Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate M74 Window Motor. 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 1 and ground. If 10 ohms or greater Ignition OFF. 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 B+ circuit terminal 2 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ 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 not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74 Window Motor. If the test lamp illuminates
5. Test or replace the M74 Window Motor.

Driver Window Switch Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the X1 harness connector at the S79D 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 1 and ground. If 10 ohms or greater Ignition OFF. 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 B+ circuit terminal 4 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ 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 not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the S79D Window Switch-Driver. If the test lamp illuminates
5. Verify the scan tool Driver Window Main Control Down Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 6 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
6. Install a 3 A fused jumper wire between the signal circuit terminal 6 and the ground circuit terminal 1.
7. Verify the scan tool Driver Window Main Control Down Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit terminal 6 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
8. Verify the scan tool Driver Window Main Control Up Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 2 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
9. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 1.
10. Verify the scan tool Driver Window Main Control Up Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit 2 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
11. Verify the scan tool Driver Window Main Control Express Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 3 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
12. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the ground circuit terminal 1.
13. Verify the scan tool Driver Window Main Control Express Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit 3 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
14. Test or replace the S79D Window Switch-Driver.

Passenger/Rear Window Switch Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the X1 harness connector at the appropriate passenger or rear S79 Window Switch. 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 1 and ground. If 10 ohms or greater Ignition OFF. 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 the appropriate scan tool Window Switch at Door parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74 Window Motor. Test for infinite resistance between the signal circuit terminal listed below and ground: S79 Window Switch - signal circuit terminal 6 S79 Window Switch - signal circuit terminal 8 If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74 Window Motor. If Inactive
5. Install a 3 A fused jumper wire between the circuit terminal listed below and ground: S79P Window Switch-Passenger - signal circuit terminal 6 S79LR Window Switch-Left Rear - signal circuit terminal 8 S79RR Window Switch-Right Rear - signal circuit terminal 8
6. Verify the scan tool Window Switch at Door parameter is Up If not Up Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74 Window Motor, ignition ON. Test for less than 1 V between the S79 Window Switch circuit terminal and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74 Window Motor. If Up
7. Install a 3 A fused jumper wire between the circuit terminal listed below and ground: S79P Window Switch-Passenger - signal circuit terminal 8 S79LR Window Switch-Left Rear - signal circuit terminal 6 S79RR Window Switch-Right Rear - signal circuit terminal 6
8. Verify the scan tool Window Switch at Door parameter is Down If not Down Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74 Window Motor, ignition ON. Test for less than 1 V between the S79 Window Switch signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Ignition OFF, test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74 Window Motor. If Down
9. Test for greater than 10 V between the signal circuit terminal 7 and ground If less than 10 V Ignition OFF, disconnect the harness connector at the M74 Window Motor. Test for infinite resistance between the S79 Window Switch signal circuit terminal 7 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance on the circuit. If less than 2 ohms, replace the M74 Window Motor. If greater than 10 V
10. Test or replace the passenger or rear S79 Window Switch.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Side Door Window Switch Replacement (Driver Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Driver Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Rear Side Door Window Switch Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
3. «Front Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
4. «Rear Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The driver window motor supplies 12 V signal circuits to the driver window switch, when a window switch has been activated, a switch closes providing a ground to the appropriate signal circuit causing the voltage to drop to 0 V. The driver window motor will detect the voltage drop in the signal circuit and will command the window to move in the desired direction.

The driver window master control switch also contains control switches for the passenger, left rear and right rear window functions. When a window switch is pressed, a serial data message is sent to the body control module (BCM). The BCM examines the request and checks for messages from other power window motors that may prohibit window movement. If no prohibitive messages have been received, the BCM will send a serial data message to the appropriate passenger or rear window switch which will perform the command as requested.

If the driver window is not performing the express up and express down functions, this may indicate that it has not been normalized. This may occur during the following conditions

1. When the driver window motor has been disconnected
2. When the driver door harness has been disconnected
3. When the battery has been disconnected or replaced

To normalize the driver window motor, refer to Window Motor Programming - Express Function .

Schematic Reference

Moveable Window Schematics (Encore) , Moveable Window Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON.
2. Verify the driver window functions while commanding the Driver Window Motor Up and Down with a scan tool. If the window does not move Up and Down as commanded Refer to Circuit/System Testing - Driver Window Motor Malfunction. If the window moves Up and Down as commanded
3. Verify the driver window moves while commanding the window UP, express UP, DOWN and express DOWN with the S79D Window Switch-Driver. If the driver window does not move UP or DOWN as commanded Refer to Circuit/System Testing - Driver Window Switch Malfunction. If the driver window does not express UP or express DOWN Normalize the driver window motor, refer to «Window Motor Programming - Express Function»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) . If after normalization, the driver window does not express UP or express DOWN Refer to Circuit/System Testing - Driver Window Switch Malfunction. If the driver window moves UP, express UP, DOWN and express DOWN as commanded
4. Verify the scan tool parameters listed below change when pressing and pulling the switches for the passenger, left rear and right rear window on the driver window master control; Left Rear Main Control Down Switch - Inactive and Active Left Rear Main Control Express Switch - Inactive and Active Left Rear Main Control Up Switch - Inactive and Active Right Rear Main Control Down Switch - Inactive and Active Right Rear Main Control Express Switch - Inactive and Active Right Rear Main Control Up Switch - Inactive and Active Front Passenger Main Control Down Switch - Inactive and Active Front Passenger Main Control Express Switch - Inactive and Active Front Passenger Main Control Up Switch - Inactive and Active If any parameter does not change Refer to Circuit/System Testing - Driver Window Switch Malfunction. If the parameters changes
5. Verify the passenger, left rear and right rear window functions while commanding the Passenger Window Motor, Left Rear Window Motor and Right Rear Window Motor Up and Down with a scan tool. If the window does not move Up and Down as commanded Refer to Circuit/System Testing - Passenger Power Window Inoperative. If the window moves Up and Down as commanded
6. All OK.

Driver Window Motor Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the M74D Window Motor-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 1 and ground. If 10 ohms or greater Ignition OFF. 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 B+ circuit terminal 2 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ 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 not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If the test lamp illuminates
5. Test or replace the M74D Window Motor-Driver.

Driver Window Switch Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S79D 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 1 and ground. If 10 ohms or greater Ignition OFF. 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 B+ circuit terminal 4 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ 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 not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the S79D Window Switch-Driver. If the test lamp illuminates
5. Verify the scan tool Driver Window Main Control Down Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 3 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
6. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the ground circuit terminal 1.
7. Verify the scan tool Driver Window Main Control Down Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit terminal 3 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
8. Verify the scan tool Driver Window Main Control Up Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 6 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
9. Install a 3 A fused jumper wire between the signal circuit terminal 6 and the ground circuit terminal 1.
10. Verify the scan tool Driver Window Main Control Up Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit 6 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
11. Verify the scan tool Driver Window Main Control Express Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the S79D Window Switch-Driver signal circuit terminal 2 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
12. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 1.
13. Verify the scan tool Driver Window Main Control Express Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the S79D Window Switch-Driver signal circuit 2 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
14. Test or replace the S79D Window Switch-Driver.

Passenger Power Window Inoperative

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate passenger or rear S79 Window Switch. 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 listed below and ground: S79P Window Switch-Passenger - ground circuit terminal 1 S79LR Window Switch-Left Rear - ground circuit terminal 5 S79RR Window Switch-Right Rear - ground circuit terminal 5 If 10 ohms or greater Ignition OFF. 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 B+ circuit terminal listed below and ground: S79P Window Switch-Passenger - B+ circuit terminal 4 S79LR Window Switch-Left Rear - B+ circuit terminal 8 S79RR Window Switch-Right Rear - B+ circuit terminal 8 If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ 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 not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the S79 Window Switch. If the test lamp illuminates
5. Ignition OFF, connect the harness connector at the S79 Window Switch and disconnect the harness connector at the M74 Window Motor.
6. Test for less than 5 ohms between the control circuit terminal 1 and ground. If 5 ohms or greater Ignition OFF, disconnect the harness connector at the S79 Window Switch. 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 S79 Window Switch. If less than 5 ohms
7. Test for less than 5 ohms between the control circuit terminal 2 and ground. If 5 ohms or greater Ignition OFF, disconnect the harness connector at the S79 Window Switch. 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 S79 Window Switch. If less than 5 ohms
8. Connect a test lamp between control circuit terminal 1 and control circuit terminal 2, ignition ON.
9. Verify the test lamp turns ON when commanding the UP and DOWN states with the S79 Window Switch. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S79 Window Switch. 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 S79 Window Switch. If the test lamp turns ON during each of the commands
10. Test or replace the M74 Window Motor.

Passenger/Rear Window Motor

1. Ignition OFF, disconnect the harness connector at the appropriate passenger or rear M74 Window Motor.
2. Install a 25 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 the function does not perform the UP and DOWN functions Replace the passenger or rear M74 Window Motor. If the function performs the UP and DOWN functions
3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

1. «Rear Side Door Window Switch Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Front Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
3. «Rear Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
4. «Front Side Door Window Switch Replacement (Driver Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Driver Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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 I/P fuse block is in RAP 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 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.

Schematic Reference

Moveable Window Schematics (Encore) , Moveable Window Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

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 passenger window performs the UP and DOWN functions at both the driver and passenger door switches. If the passenger window is inoperative from both the driver and passenger window switches Refer to Circuit/System Testing - Passenger Window Inoperative From Both Switches. If the passenger window is inoperative from the passenger window switch only Refer to Circuit/System Testing - Passenger Window Switch Inoperative. If the passenger window is inoperative from the driver window switch only Test or replace the S79D Window Switch - Driver. If the passenger window performs the UP and DOWN functions at both switches
4. All OK.

Driver Window Inoperative

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S79D 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 1 and ground. If 10 ohms or greater Ignition OFF. 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 3 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. 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»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures) . If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. 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 Test for infinite resistance between the control circuits listed below and ground: Control circuit terminal 4 Control circuit terminal 5 Control circuit terminal 6 Control circuit terminal 7 If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the S79D Window Switch-Driver. If the test lamp illuminates
5. Ignition OFF and all vehicle systems OFF, connect the harness connector at the S79D Window Switch-Driver. It may take up to 2 minutes for all vehicle systems to power down
6. Disconnect the harness connector at the M74D Window Motor-Driver.
7. Test for less than 10 ohms between the control circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D window switch - driver. 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 S79D Window Switch-Driver. If less than 10 ohms
8. Test for less than 10 ohms between the control circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
9. Connect a test lamp between control circuit terminal 1 and control circuit terminal 2, ignition ON.
10. Verify the test lamp turns ON when commanding the UP and DOWN states with the S79D Window Switch-Driver. If the test lamp remains OFF during either of the commands Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If the test lamp turns ON during each of the commands
11. Test or replace the M74D Window Motor-Driver.

Passenger Window Inoperative From Both Switches

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S79P 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 3 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
3. Test for less than 10 ohms between the control circuit terminal 6 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
4. Connect a test lamp between the control circuit terminal 3 and control circuit terminal 6, ignition ON.
5. Verify the test lamp turns ON when commanding the UP and DOWN functions with the S79D Window Switch-Driver. If the test lamp remains OFF during either of the commands Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D 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 S79P Window Switch-Passenger and disconnect the harness connector at the M74P 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 1 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If less than 10 ohms
8. Test for less than 10 ohms between the control circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If less than 10 ohms
9. Connect a test lamp between control circuit terminal 1 and control circuit terminal 2, ignition ON.
10. Verify the test lamp turns ON when commanding the UP and DOWN functions with the S79P Window Switch-Passenger. If the test lamp remains OFF during either of the commands Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If the test lamp turns ON during each of the commands
11. Test or replace the M74P window motor - passenger.

Passenger Window Switch Inoperative

1. Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger, ignition ON
2. Verify a test lamp illuminates between the ignition circuit terminal 5 and ground. If the test lamp does not illuminate Ignition OFF. 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 S79P Window Switch-Passenger.

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 the motor does not perform the UP and DOWN functions Replace the M74 window motor. If the motor performs the UP and DOWN functions
3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Side Door Window Switch Replacement (Driver Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Driver Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Front Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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 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.

Schematic Reference

Moveable Window Schematics (Encore) , Moveable Window Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

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 passenger window performs the UP and DOWN functions at both the driver and passenger door switches. If the M74P Window Motor-Passenger is inoperative from both the S79D Window Switch-Driver and S79P Window Switch-Passenger Refer to Circuit/System Testing - Passenger Window Inoperative From Both Switches. If the M74P Window Motor-Passenger is inoperative from the S79P Window Switch-Passenger only Refer to Circuit/System Testing - Passenger Window Switch Inoperative. If the M74P Window Motor-Passenger is inoperative from the S79D Window Switch-Driver only Test or replace the S79D Window Switch - Driver. If the M74P Window Motor-Passenger performs the UP and DOWN functions at both S79D Window Switch-Driver and S79P Window Switch-Passenger
4. Verify the M74LR Window Motor-Left Rear and M74RR Window Motor-Right Rear performs the UP and DOWN functions at both the S79D Window Switch-Driver and each of the S79 Window Switch-Rear. If a M74 Window Motor-Rear is inoperative from both the S79D Window Switch-Driver and S79 Window Switch-Rear Refer to Circuit/System Testing - Rear Window Inoperative From Both Switches If a M74 Window Motor-Rear is inoperative from the S79 Window Switch-Rear only Refer to Circuit/System Testing - Rear Window Switch Inoperative If a M74 Window Motor-Rear is inoperative from the S79D Window Switch-Driver only Test or replace the S79D Window Switch-Driver. If the M74 Window Motor-Rear performs the UP and DOWN functions at both the S79D Window Switch-Driver and the S79 Window Switch-Rear
5. Lock out the rear window switches by pressing the lockout switch on the S79D Window Switch-Driver.
6. Verify the M74LR Window Motor-Left Rear and M74RR Window Motor-Right Rear is inoperative at both of the S79 Window Switch-Rear . If both M74 Window Motor-Rear continue to function from the S79 Window Switch-Rear Refer to Circuit/System Testing - Rear Window Lockout Inoperative If both M74 Window Motor-Rear is inoperative from the S79 Window Switch-Rear
7. All OK.

Driver Window Inoperative

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S79D 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 11 and ground. If 10 ohms or greater Ignition OFF. 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 12 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. 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»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures) . If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. 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, replace the S79D Window Switch-Driver. If the test lamp illuminates
5. Ignition OFF and all vehicle systems OFF, connect the harness connector at the S79D Window Switch-Driver and disconnect the harness connector at the M74D 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 1 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
7. Test for less than 10 ohms between the control circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
8. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2, ignition ON.
9. Verify the test lamp turns ON when commanding the UP and DOWN states with the S79D Window Switch-Driver. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If the test lamp turns ON during each of the commands
10. Test or replace the M74D Window Motor-Driver.

Passenger Window Inoperative From Both Switches

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S79P 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 3 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
3. Test for less than 10 ohms between the control circuit terminal 6 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
4. Connect a test lamp between the control circuit terminal 3 and control circuit terminal 6, ignition ON.
5. Verify the test lamp turns ON when commanding the UP and DOWN functions with the S79D Window Switch-Driver. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D 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 S79P Window Switch-Passenger and disconnect the harness connector at the M74P 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 1 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If less than 10 ohms
8. Test for less than 10 ohms between the control circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If less than 10 ohms
9. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2, ignition ON.
10. Verify the test lamp turns ON when commanding the UP and DOWN functions with the S79P Window Switch-Passenger. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If the test lamp turns ON during each of the commands
11. Test or replace the M74P window motor - passenger.

Passenger Window Switch Inoperative

1. Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger, ignition ON
2. Verify a test lamp illuminates between the ignition circuit terminal 5 and ground. If the test lamp does not illuminate Ignition OFF. 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 S79P Window Switch-Passenger.

Rear Window Inoperative From Both Switches

1. Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. Ignition ON
2. Verify a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. 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»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures) . If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. 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 Test for infinite resistance between the control circuits listed below and ground: Control circuit terminal 1 Control circuit terminal 2 Control circuit terminal 3 Control circuit terminal 4 Control circuit terminal 5 If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the S79D Window Switch-Driver. If the test lamp illuminates
3. Ignition OFF and all vehicle systems OFF, connect the harness connector at the S79D Window Switch-Driver and disconnect the harness connector at the appropriate S79 Window Switch-Rear. It may take up to 2 minutes for all vehicle systems to power down
4. Test for less than 10 ohms between the control circuit terminal 3 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
5. Test for less than 10 ohms between the control circuit terminal 6 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
6. Connect a test lamp between the control circuit terminal 3 and control circuit terminal 6, ignition ON.
7. Verify the test lamp turns ON when commanding the UP and DOWN states with the S79D Window Switch-Driver. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If the test lamp turns ON during each of the commands
8. Ignition OFF and all vehicle systems OFF, connect the harness connector at the S79 Window Switch-Rear and disconnect the harness connector at the M74 Window Motor-Rear. It may take up to 2 minutes for all vehicle systems to power down.
9. Test for less than 10 ohms between the control circuit terminal listed below and ground: Control terminal 1 Control terminal 2 If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79 Window Switch-Rear. 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 S79 Window Switch-Rear. If less than 10 ohms
10. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 2, ignition ON.
11. Verify the test lamp turns ON when commanding the UP and DOWN states with the S79 Window Switch-Rear. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S79 Window Switch-Rear. 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 S79 Window Switch-Rear. If the test lamp turns ON during each of the commands
12. Test or replace the M74 Window Motor-Rear.

Rear Window Lockout Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate S79 Window Switch-Rear.
2. Ignition ON, connect a test lamp between the control circuit terminal 5 and ground.
3. Verify the test lamp turns ON and OFF when commanding the rear window lockout ON and OFF with the S79D Window Switch-Driver. If the test lamp is always OFF Ignition OFF, remove the test lamp, disconnect the harness connector at the S79D Window Switch-Driver. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance 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 S79D Window Switch-Driver. If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the harness connector at the S79D Window Switch-Driver, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the S79D Window Switch-Driver. If the test lamp turns ON and OFF
4. Test or replace the S79 Window Switch-Rear.

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 the motor does not perform the UP and DOWN functions Replace the M74 Window Motor. If the motor performs the UP and DOWN functions
3. All OK

Driver Window Switch

1. Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver.
2. Test for infinite resistance between the terminals listed below with the switch in the open position: Ignition terminal 13 and control terminal 12 Ignition terminal 13 and control terminal 14 Ignition terminal 6 and control terminal 2 Ignition terminal 6 and control terminal 3 Ignition terminal 6 and control terminal 4 Ignition terminal 6 and control terminal 5 If less than infinite resistance Replace the S79D 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 11 and control terminal 2 Ground terminal 11 and control terminal 3 Ground terminal 11 and control terminal 4 Ground terminal 11 and control terminal 5 Ground terminal 11 and control terminal 12 Ground terminal 11 and control terminal 14 If 3 ohms or greater Replace the S79D 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. Ignition terminal 13 and control terminal 14 Ignition terminal 6 and control terminal 3 Ignition terminal 6 and control terminal 5 If 3 ohms or greater Replace the S79D 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: Ignition terminal 13 and control terminal 12 Ignition terminal 6 and control terminal 2 Ignition terminal 6 and control terminal 4 If 3 ohms or greater Replace the S79D Window Switch-Driver. If less than 3 ohms
6. All OK

Passenger Window Switch

1. Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger.
2. Test for infinite resistance between the terminals listed below with the switch in the open position: Ignition terminal 5 and control terminal 1 Ignition terminal 5 and control terminal 4 If less than infinite resistance Replace the S79P 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 3 and control terminal 1 Control terminal 4 and control terminal 6 If 3 ohms or greater Replace the S79P Window Switch-Passenger. If less than 3 ohms
4. Test for less than 3 ohms between the ignition terminal 5 and the control terminal 1 with the switch in the Up position. If 3 ohms or greater Replace the S79P Window Switch-Passenger. If less than 3 ohms
5. Test for less than 3 ohms between the ignition terminal 5 and the control terminal 4 with the switch in the Down position. If 3 ohms or greater Replace the S79P Window Switch-Passenger. If less than 3 ohms
6. All OK

Rear Window Switch

1. Ignition OFF, disconnect the harness connector at the appropriate S79 Window Switch-Rear.
2. Test for infinite resistance between the terminals listed below with the switch in the open position: Control terminal 5 and control terminal 1 Control terminal 5 and control terminal 4 If less than infinite resistance Replace the S79 Window Switch-Rear.. 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 3 and control terminal 1 Control terminal 4 and control terminal 6 If 3 ohms or greater Replace the S79 Window Switch-Rear.. If less than 3 ohms
4. Test for less than 3 ohms between the control terminal 5 and the control terminal 1 with the switch in the Up position. If 3 ohms or greater Replace the S79 Window Switch-Rear.. If less than 3 ohms
5. Test for less than 3 ohms between the control terminal 5 and the control terminal 4 with the switch in the Down position. If 3 ohms or greater Replace the S79 Window Switch-Rear.. If less than 3 ohms
6. All OK

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Side Door Window Switch Replacement (Driver Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Driver Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Front Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
3. «Rear Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
4. «Rear Side Door Window Switch Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/encore/i-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The driver side window consists of a driver window switch and a window motor capable of express up and express down functions. When the driver window switch is pressed or pulled, the voltage within the appropriate signal circuit drops and the window motor will then perform the commanded 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 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.

A window motor that has not been normalized will no longer perform the express up and express down functions, this may occur during the following conditions

1. When a window motor has been disconnected
2. When a door harness has been disconnected
3. When the battery has been disconnected or replaced

To normalize the window motor refer to Window Motor Programming - Express Function .

Schematic Reference

Moveable Window Schematics (Encore) , Moveable Window Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Power Windows Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON.
2. Verify the M74D Window Motor-Driver functions while commanding the Driver Window Motor Up and Down with a scan tool. If the M74D Window Motor-Driver does not move UP and DOWN as commanded Refer to Circuit/System Testing - Driver Window Motor Malfunction. If the M74D Window Motor-Driver moves UP and DOWN as commanded
3. Verify the M74D Window Motor-Driver moves while commanding the window UP and DOWN with the S79D Window Switch-Driver. If the M74D Window Motor-Driver does not move UP and DOWN as commanded Refer to Circuit/System Testing - Driver Window Switch Malfunction. If the M74D Window Motor-Driver moves UP and DOWN as commanded
4. Verify the M74D Window Motor-Driver performs the express UP and express DOWN functions with the S79D Window Switch-Driver. If the driver window does not express UP or express DOWN Normalize the M74D Window Motor-Driver, refer to «Window Motor Programming - Express Function»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) . Verify the M74D Window Motor-Driver performs the express UP and express DOWN functions with the S79D Window Switch-Driver If the M74D Window Motor-Driver does not express UP or express DOWN Refer to Circuit/System Testing - Driver Window Switch Malfunction. If the M74D Window Motor-Driver performs the express UP and express DOWN functions
5. Verify the M74P Window Motor-Passenger performs the UP and DOWN functions at both the S79D Window Switch-Driver and S79P Window Switch-Passenger. If the M74P Window Motor-Passenger is inoperative from both the S79D Window Switch-Driver and S79P Window Switch-Passenger Refer to Circuit/System Testing - Passenger Window Inoperative From Both Switches. If the M74P Window Motor-Passenger is inoperative from the S79P Window Switch-Passenger only Refer to Circuit/System Testing - Passenger Window Inoperative From A Single Switch. If the M74P Window Motor-Passenger is inoperative from the S79D Window Switch-Driver only Refer to Circuit/System Testing - Passenger Window Inoperative From A Single Switch. If the M74P Window Motor-Passenger performs the UP and DOWN functions at both S79D Window Switch-Driver and S79P Window Switch-Passenger
6. Verify the M74LR Window Motor-Left Rear and M74RR Window Motor-Right Rear performs the UP and DOWN functions at both the S79D Window Switch-Driver and each of the S79 Window Switch-Rear. If a M74 Window Motor-Rear is inoperative from both the driver and rear window switch Refer to Circuit/System Testing - Rear Window Inoperative From Both Switches If a M74 Window Motor-Rear is inoperative from the S79 Window Switch-Rear only Refer to Circuit/System Testing - Rear Window Switch Inoperative If a M74 Window Motor-Rear is inoperative from the S79D Window Switch-Driver only Test or replace the S79D Window Switch-Driver. If both M74 Window Motor-Rear performs the UP and DOWN functions at the S79D Window Switch-Driver and the S79 Window Switch-Rear
7. Lock out the rear window switches by pressing the lockout switch on the S79D Window Switch-Driver.
8. Verify the M74LR Window Motor-Left Rear and M74RR Window Motor-Right Rear is inoperative at both of the S79 Window Switch-Rear . If both M74 Window Motor-Rear continue to function from the S79 Window Switch-Rear Refer to Circuit/System Testing - Rear Window Lockout Inoperative If both M74 Window Motor-Rear are inoperative from the S79 Window Switch-Rear
9. All OK.

Driver Window Motor Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the M74D Window Motor-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 1 and ground. If 10 ohms or greater Ignition OFF. 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 B+ circuit terminal 2 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. Test for less than 2 ohms in the B+ 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 not open and there is voltage at the fuse. If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If the test lamp illuminates
5. Replace the M74D Window Motor-Driver.

Driver Window Switch Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S79D 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 11 and ground. If 10 ohms or greater Ignition OFF. 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 the scan tool Driver Window Main Control Down Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the signal circuit terminal 8 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
5. Install a 3 A fused jumper wire between the signal circuit terminal 8 and the ground circuit terminal 11.
6. Verify the scan tool Driver Window Main Control Down Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the signal circuit terminal 8 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
7. Verify the scan tool Driver Window Main Control Up Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the signal circuit terminal 9 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
8. Install a 3 A fused jumper wire between the signal circuit terminal 9 and the ground circuit terminal 11.
9. Verify the scan tool Driver Window Main Control Up Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the signal circuit terminal 9 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
10. Verify the scan tool Driver Window Main Control Express Switch parameter is Inactive. If not Inactive Ignition OFF, disconnect the harness connector at the M74D Window Motor-Driver. Test for infinite resistance between the signal circuit terminal 7 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the M74D Window Motor-Driver. If Inactive
11. Install a 3 A fused jumper wire between the signal circuit terminal 7 and the ground circuit terminal 11.
12. Verify the scan tool Driver Window Main Control Express Switch parameter is Active If not Active Ignition OFF, remove the 3 A fused jumper wire, disconnect the harness connector at the M74D Window Motor-Driver, ignition ON. Test for less than 1 V between the signal circuit terminal 7 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the M74D Window Motor-Driver. If Active
13. Test or replace the S79D Window Switch-Driver.

Passenger Window Inoperative From Both Switches

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S79P 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 3 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
3. Test for less than 10 ohms between the control circuit terminal 6 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
4. Connect a test lamp between the control circuit terminal 3 and control circuit terminal 6, ignition ON.
5. Verify the test lamp turns ON when commanding the UP and DOWN functions with the S79D Window Switch-Driver. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D 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 S79P Window Switch-Passenger and disconnect the harness connector at the M74P 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 1 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If less than 10 ohms
8. Test for less than 10 ohms between the control circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If less than 10 ohms
9. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2, ignition ON.
10. Verify the test lamp turns ON when commanding the UP and DOWN functions with the S79P Window Switch-Passenger. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If the test lamp turns ON during each of the commands
11. Test or replace the M74P Window Motor-Passenger.

Passenger Window Inoperative From A Single Switch

1. Ignition OFF, disconnect the harness connector at the appropriate S79P Window Switch-Passenger or S79D Window Switch-Driver, ignition ON
2. Verify a test lamp illuminates between the ignition circuit terminal listed below and ground. S79P Window Switch-Passenger - ignition circuit terminal 5 S79D Window Switch-Driver - ignition circuit terminal 13 If the test lamp does not illuminate Ignition OFF. 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 S79P Window Switch-Passenger or S79D Window Switch-Driver,.

Rear Window Inoperative From Both Switches

1. Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. Ignition ON
2. Verify a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF. 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»(/buick/encore/i-2012-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures) . If the test lamp does not illuminate and the circuit fuse is open Ignition OFF. 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 Test for infinite resistance between the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 Control circuit terminal 3 Control circuit terminal 4 Control circuit terminal 5 If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the S79D Window Switch-Driver. If the test lamp illuminates
3. Ignition OFF and all vehicle systems OFF, connect the harness connector at the S79D Window Switch-Driver and disconnect the harness connector at the appropriate S79 Window Switch-Rear. It may take up to 2 minutes for all vehicle systems to power down
4. Test for less than 10 ohms between the control circuit terminal 3 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
5. Test for less than 10 ohms between the control circuit terminal 6 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If less than 10 ohms
6. Connect a test lamp between the control circuit terminal 3 and control circuit terminal 6, ignition ON.
7. Verify the test lamp turns ON when commanding the UP and DOWN states with the S79D Window Switch-Driver. If the test lamp remains OFF during either of the commands Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. 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 S79D Window Switch-Driver. If the test lamp turns ON during each of the commands
8. Ignition OFF and all vehicle systems OFF, connect the harness connector at the S79 Window Switch-Rear and disconnect the harness connector at the M74 Window Motor-Rear. It may take up to 2 minutes for all vehicle systems to power down.
9. Test for less than 10 ohms between the control circuit terminal listed below and ground: Control terminal 1 Control terminal 2 If 10 ohms or greater Ignition OFF, disconnect the harness connector at the S79 Window Switch-Rear. 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 S79 Window Switch-Rear. If less than 10 ohms
10. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 2, ignition ON.
11. Verify the test lamp turns ON when commanding the UP and DOWN states with the S79 Window Switch-Rear. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S79 Window Switch-Rear. 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 S79 Window Switch-Rear. If the test lamp turns ON during each of the commands
12. Test or replace the M74 Window Motor-Rear.

Rear Window Lockout Inoperative

1. Ignition OFF, disconnect the harness connector at the appropriate S79 Window Switch-Rear. Ignition ON
2. Connect a test lamp between the control circuit terminal 5 and ground.
3. Verify the test lamp turns ON and OFF when commanding the rear window lockout ON and OFF with the rear window lockout switch. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance 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 S79D Window Switch-Driver. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver, ignition ON. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the S79D Window Switch-Driver. If the test lamp turns ON and OFF
4. Test or replace the S79 Window Switch-Rear.

1. Ignition OFF, disconnect the harness connector at the appropriate passenger or rear 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 the M74 Window Motor does not perform the UP and DOWN functions Replace the passenger or rear M74 Window Motor. If the M74 Window Motor performs the UP and DOWN functions
3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Side Door Window Regulator Motor Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
2. «Rear Side Door Window Switch Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
3. «Rear Side Door Window Regulator Replacement (Power)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Rear Side Door Window Regulator Replacement»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
4. «Front Side Door Window Switch Replacement (Driver Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Encore)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Driver Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) , «Front Side Door Window Switch Replacement (Passenger Side, Trax)»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)

Side Door Window Mechanical Diagnosis

Side Door Window Mechanical Diagnosis

Windshield Replacement

Special Tools

1. BO-24402-A Glass Sealant Remover (Cold Knife)
2. BO-39032 Stationary Glass Removal Tool
3. Use an adhesive that is approved by GM

For equivalent regional tools, refer to Special Tools .

Removal Procedure

1. Open the hood.
2. Remove the windshield wiper arms. Refer to «Windshield Wiper Arm Replacement»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
3. Remove the air inlet grille. Refer to «Air Inlet Grille Panel Replacement (Trax)»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Air Inlet Grille Panel Replacement (Encore)»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
4. Remove the outside moisture sensor. Refer to «Windshield Outside Moisture Sensor Replacement»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
5. Remove the remote control door lock receiver. Refer to «Remote Control Door Lock Receiver Replacement (Without UFL and LDW)»(/buick/encore/i-2012-2016/remont/door-locks-anti-theft-systems/#keyless-entry-system-and-remote-functions) , «Remote Control Door Lock Receiver Replacement (With UFL and LDW)»(/buick/encore/i-2012-2016/remont/door-locks-anti-theft-systems/#keyless-entry-system-and-remote-functions) .
6. Remove the inside rearview mirror. Refer to «Inside Rearview Mirror Replacement»(/buick/encore/i-2012-2016/remont/mirrors/#mirror-system) .
7. Remove the windshield garnish molding. Refer to «Windshield Garnish Molding Replacement (Encore)»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) , «Windshield Garnish Molding Replacement (Trax)»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .
8. Cover to protect the following parts from broken glass: Upper dash pad Defroster outlets and A/C outlets Seats and carpeting
9. Using the appropriate tool, carefully cut the windshield reveal molding in order to access the auto-adhesive bead.
10. This will allow the auto-adhesive to be separated from the window. Leave a base of auto-adhesive on the pinchweld flange. The only suitable lubrication is clean water, no oils, lubes or soaps. Use BO-24402-A Glass Sealant Remover (Cold Knife). BO-39032 Stationary Glass Removal Tool , or equivalent in order to remove the window.
11. Use the appropraite tool to remove the bottom of the window from the auto-adhesive. Keep the cutting edge of the tool against the window. Do this from inside the vehicle.
12. With an assistant, remove the window (2) from the vehicle. Check that the retainers (1) are still attached to the window before installing.

Installation Procedure

1. Install the windshield into the opening. Refer to «Adhesive Installation of Windshields»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system__adhesive-installation-of-windshields) .
2. Remove the outside moisture sensor. Refer to «Windshield Outside Moisture Sensor Replacement»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
3. Remove the remote control door lock receiver. Refer to «Remote Control Door Lock Receiver Replacement (Without UFL and LDW)»(/buick/encore/i-2012-2016/remont/door-locks-anti-theft-systems/#keyless-entry-system-and-remote-functions) , «Remote Control Door Lock Receiver Replacement (With UFL and LDW)»(/buick/encore/i-2012-2016/remont/door-locks-anti-theft-systems/#keyless-entry-system-and-remote-functions) .
4. Install the rearview mirror. Refer to «Inside Rearview Mirror Replacement»(/buick/encore/i-2012-2016/remont/mirrors/#mirror-system) .
5. Install the windshield garnish molding. Refer to «Windshield Garnish Molding Replacement (Encore)»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) , «Windshield Garnish Molding Replacement (Trax)»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .
6. Install the air inlet grille. Refer to «Air Inlet Grille Panel Replacement (Trax)»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Air Inlet Grille Panel Replacement (Encore)»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
7. Install the windshield wipers arms. Refer to «Windshield Wiper Arm Replacement»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
8. Remove the double layer of masking tape around the perimeter of the painted surfaces and the interior trim.
9. Close the hood.

Scheme 8

Front Side Door Window Replacement

Scheme 9

Rear Side Door Window Replacement

Scheme 10

Rear Side Door Stationary Window Replacement

Liftgate Window Replacement

Special Tools

1. J 24402-A Glass Sealant (Cold Knife) Remover
2. J 39032 Stationary Glass Removal Tool
3. Use a urethane adhesive systems which meet GM Specification GMW 15672

1. Open the liftgate.
2. Remove the liftgate trim. Refer to «Liftgate Lower Trim Finish Panel Replacement»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .
3. Disconnect the electrical connectors from the liftgate window defogger bus bar.
4. Remove the rear window wiper arm. Refer to «Rear Window Wiper Arm Replacement»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
5. Remove the rear spoiler. Refer to «Rear End Spoiler Replacement»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#exterior-trim) .
6. Cover the following parts to protect from broken glass, seats and carpeting.
7. Remove the window from the urethane adhesive. Leave a base of urethane approximately 2 mm (0.078 in) on the pinch-weld flange. The only suitable lubrication is clear water, no oils, lubes or soaps. Use J 24402-A glass sealant (cold knife) remover , J 39032 stationary glass removal tool or equivalent in order to remove the window.
8. If necessary, use a long utility knife or similar tool to remove the bottom corners of the window from the urethane adhesive.
9. With an assistant, remove the window (2) from the vehicle. Check that the retainers (1) are still attached to the window before installing.

1. Install the liftgate window into the opening. Refer to «Adhesive Installation of Liftgate Windows»(/buick/encore/i-2012-2016/remont/heated-glassdefoggers/#fixed-and-moveable-window-system__adhesive-installation-of-liftgate-windows) .
2. Install the rear spoiler. Refer to «Rear End Spoiler Replacement»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#exterior-trim) .
3. Install the rear window wiper arm. Refer to «Rear Window Wiper Arm Replacement»(/buick/encore/i-2012-2016/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
4. Connect the liftgate window defogger electrical connectors to the bus bar.
5. Install the liftgate trim. Refer to «Liftgate Lower Trim Finish Panel Replacement»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#interior-trim-and-interior-paneling) .
6. Remove the double layer of masking tape around the perimeter of the painted surfaces and the interior trim.
7. Close the liftgate.

Scheme 11

Front Side Door Stationary Window Replacement

Scheme 12

Front Side Door Window Switch Replacement (Driver Side, Encore)

Scheme 13

Front Side Door Window Switch Replacement (Passenger Side, Encore)

Scheme 14

Front Side Door Window Switch Replacement (Driver Side, Trax)

Scheme 15

Front Side Door Window Switch Replacement (Passenger Side, Trax)

Scheme 16

Rear Side Door Window Switch Replacement

Scheme 17

Front Side Door Window Regulator Replacement (Power)

Scheme 18

Front Side Door Window Regulator Replacement (Manual)

Window Motor Normalized Procedure

A window motor that has not been normalized will no longer perform the express up and express down functions, this may occur during the following conditions

1. When a window motor has been disconnected or replaced
2. When a door harness has been disconnected
3. When the battery has been disconnected or replaced

Note. When DTC B3205 4B & 3210 4B are set, the following warnings will be displayed on the driver information center: Open, then Close Driver Window Open, then Close Passenger Window These warnings will clear once the windows have been "Normalized" and the respective DTC will clear.

To normalize the window motor, follow these steps

1. Ignition ON.
2. Starting with the window completely UP, press and hold the power window switch until the window is fully open and continue holding the switch down for approximately 5 seconds after the window is completely open.
3. Pull the power window switch up until the window is fully closed and continue holding the switch up for approximately 5 seconds after the window is completely closed.

The window should now be normalized and the window should perform the express up and express down functions.

Window Motor Relearn Procedure

A relearn procedure may need to be performed for any Local Interconnect Network (LIN) window motor for the following conditions

1. When the window glass is out of alignment
2. When the window glass has been replaced
3. When the door has been replaced
4. When the window regulator has been replaced

Note. Prior to performing the relearn procedure the vehicle must have all 4 wheels properly inflated and mounted, the vehicle must be sitting on a level surface and all doors must be completely closed and for vehicles equipped with a folding convertible top, the top must be closed and firmly latched..

To relearn the window motor, follow these steps

1. Ignition ON.
2. With a scan tool, select Module Diagnosis, Body Control Module, Configuration/Reset Functions and then select the appropriate Clear Window Learn Values for the window motor requiring the relearn procedure.
3. After the learn procedure, exit the scan tool learn procedure completely, the power window cannot be normalized and will not function until you exit the program.
4. Starting with the window completely UP, press and hold the power window switch until the window is fully open and continue holding the switch down for approximately 5 seconds after the window is completely open.
5. Pull the power window switch up until the window is fully closed and continue holding the switch up for approximately 5 seconds after the window is completely closed.

The window is now reprogrammed.

Scheme 19

Front Side Door Window Regulator Motor Replacement

Scheme 20

Rear Side Door Window Regulator Replacement (Power)

Scheme 21

Rear Side Door Window Regulator Replacement

Scheme 22

Rear Side Door Window Regulator Motor Replacement

Scheme 23

Front Side Door Window Regulator Handle Replacement

Front Side Door Window Rear Guide Replacement

Front Side Door Window Rear Guide Replacement

Scheme 24

Rear Side Door Window Rear Guide Replacement

Scheme 25

Front Side Door Window Outer Sealing Strip Replacement

Scheme 26

Front Side Door Window Inner Sealing Strip Replacement (Encore)

Scheme 27

Front Side Door Window Inner Sealing Strip Replacement (Trax)

Scheme 28

Rear Side Door Window Inner Sealing Strip Replacement

Scheme 29

Rear Side Door Window Outer Sealing Strip Replacement

Scheme 30

Front Side Door Window Weatherstrip Replacement

Scheme 31

Rear Side Door Window Weatherstrip Replacement

Adhesive Installation of Windshields

1. Use a urethane adhesive systems which meet GM Specification GMW 15672.
2. Remove all mounds or loose pieces of urethane adhesive from the pinchweld area.
3. If the original window is being reused, remove all but approximately 2 mm (3/64 in) of the existing bead of urethane adhesive from the pinchweld flange by using a clean utility knife or razor blade scraper.
4. Inspect for any of the following problems in order to help prevent future breakage of the window: The flange of the window opening High weld Solder spots Hardened sealer Any other obstruction or irregularity in the pinchweld flange
5. After repairing the opening as indicated, perform the following steps: Remove all traces of broken glass from the outer cowl panel, seats, floor and defroster ducts. Clean around the edge of the inside surface of the window with a 50/50 mixture of isopropyl alcohol and water by volume on a dampened lint free cloth.
6. Verify all primers and urethane adhesive are within expiration dates.
7. Apply the primer to the surface of the pinch-weld flange (1).
8. Allow the pinch-weld primer to dry per auto-adhesive instructions by the manufacturer's.
9. With an assistant, dry fit the window (2) to the opening in order to determine the correct position.
10. Use masking tape in order to mark the locations (1) of the window (2) in the opening.
11. Cut the masking tape in the center and remove the window from the opening.
12. Apply glass prep clear to the area approximately 10-16 mm (3/8-5/8 in) around the entire perimeter of the window inner surface. Immediately wipe the glass primed area using a clean, lint-free cloth.
13. Apply bonded-glass primer and let dry per auto-adhesive instructions by the manufacturer's.
14. Apply the auto-adhesive primer-application (2) around the perimeter of the window (1) per auto-adhesive instructions by the manufacturer's.
15. Apply the glass primer black to the same areas that glass prep clear was applied.
16. Allow the glass primer to dry per auto-adhesive instructions by the manufacturer's.
17. Use a cartridge-type caulking gun in order to apply a smooth, continuous bead. Cut the applicator nozzle to provided a V cut to apply the auto-adhesive.
18. Use the edge of the window as a guide for the nozzle in order to apply the urethane adhesive (1) to the inner surface of the window (3).
19. With an assistant, align the window locating pins (1) to the slots located in each corner of the pinch-weld flange. Lower the window (2) to touch the auto-adhesive.
20. Gently depress the window on the auto-adhesive bead until the window reveal molding is seated.
21. Tape the window to the body in order to minimize movement and until the auto-adhesive cures per auto-adhesive instructions by the manufacturer's.
22. Ensure all excess urethane adhesive is cleaned from the body before water test.
23. Use a soft spray of warm water in order to immediately water test the window.
24. Inspect the window for leaks.
25. If any leaks are found, use a plastic paddle in order to apply extra urethane adhesive at the leak point.
26. Retest the window for leaks.
27. Maintain the following conditions in order to properly cure the urethane adhesive: Partially lower a door window in order to prevent pressure buildups when closing doors before the urethane adhesive cures. Do not drive the vehicle until the urethane adhesive is cured. Refer to the above curing times. Do not use compressed air in order to dry the urethane adhesive.
28. Complete the window installation.

Adhesive Installation of Liftgate Windows

1. Use a urethane adhesive systems which meet GM Specification GMW 15672.
2. Remove all mounds or loose pieces of urethane adhesive from the pinchweld area.
3. If the original window is being reused, remove all but approximately 2 mm (3/64 in) of the existing bead of urethane adhesive from the pinchweld flange by using a clean utility knife or razor blade scraper.
4. Inspect for any of the following problems in order to help prevent future breakage of the window: The flange of the window opening High weld Solder spots Hardened sealer Any other obstruction or irregularity in the pinchweld flange
5. After repairing the opening as indicated, perform the following steps: Remove all traces of broken glass from the outer cowl panel, seats, floor and defroster ducts. Clean around the edge of the inside surface of the window with a 50/50 mixture of isopropyl alcohol and water by volume on a dampened lint free cloth.
6. Verify all primers and urethane adhesive are within expiration dates.
7. Apply the primer to the surface of the pinch-weld flange (1).
8. Allow the pinch-weld primer to dry per auto-adhesive instructions by the manufacturer's.
9. With an assistant, dry fit the window (2) to the opening in order to determine the correct position.
10. Use masking tape in order to mark the locations (1) of the window (2) in the opening.
11. Cut the masking tape in the center and remove the window from the opening.
12. Apply glass prep clear to the area approximately 10-16 mm (3/8-5/8 in) around the entire perimeter of the window inner surface. Immediately wipe the glass primed area using a clean, lint-free cloth.
13. Apply bonded-glass primer and let dry per auto-adhesive instructions by the manufacturer's.
14. Apply the auto-adhesive primer-application (2) around the perimeter of the window (1) per auto-adhesive instructions by the manufacturer's.
15. Apply the glass primer black to the same areas that glass prep clear was applied.
16. Allow the glass primer to dry per auto-adhesive instructions by the manufacturer's.
17. Use a cartridge-type caulking gun in order to apply a smooth, continuous bead. Cut the applicator nozzle to provided a V cut to apply the auto-adhesive.
18. Install the window reveal molding, if equipped.
19. Use the edge of the window as a guide for the nozzle in order to apply the urethane adhesive (1) to the inner surface of the window (3).
20. With an assistant, align the window locating pins (1) to the slots located in each corner of the pinch-weld flange. Lower the window (2) to touch the auto-adhesive.
21. If the locating pins were damaged, align the masking tape (1) lines on the window (2) and the body.
22. Gently depress the window on the auto-adhesive bead until the window reveal molding is seated.
23. Tape the window to the body in order to minimize movement and until the auto-adhesive cures per auto-adhesive instructions by the manufacturer's.
24. Ensure all excess urethane adhesive is cleaned from the body before water test.
25. Use a soft spray of warm water in order to immediately water test the window.
26. Inspect the window for leaks.
27. If any leaks are found, use a plastic paddle in order to apply extra urethane adhesive at the leak point.
28. Retest the window for leaks.
29. Maintain the following conditions in order to properly cure the urethane adhesive: Partially lower a door window in order to prevent pressure buildups when closing doors before the urethane adhesive cures. Do not drive the vehicle until the urethane adhesive is cured. Refer to the above curing times. Do not use compressed air in order to dry the urethane adhesive.
30. Complete the window installation.

Full-Cut Method Description

Note. If corrosion of the pinch-weld flange is present, or if sheet metal repairs or replacements are required, refinish the pinch-weld flange in order to present a clean, primer-only surface. If paint repairs are required, mask the flange bonding area, prior to applying the color coat, in order to provide a clean, primer-only surface. Appropriate materials for these primer applications are typically 2 component catalyzed products. Use materials such as BASF DE15®, DuPont 2610®, Sherwin-Williams PSE 4600 and NP70® and Martin-Semour 5120 ,5130® , PPG DP90LF SPIES/HECKER 3688/8590 - 3688/5150 - 4070/5090 STANDOX 11158/13320 - 14653/14980 products are approved for this application. Follow the manufacturer's directions for the mix, the application, and the drying times. After repairing the opening as indicated, shake the pinch-weld primer black #3 well. Using a new dauber, apply the primer to the primed surface of the flange in the bonding area. Allow the primer to dry for 10 minutes.

Use only the full cut method, also known in the field as full strip method, when installing windows.

This method includes the following

1. The replacement of a majority of the urethane adhesive bead. Remove all but approximately 2 mm (3/64 in) of the existing bead of urethane adhesive from the pinch-weld flange.
2. Apply pinch-weld primer to any exposed painted areas on the pinch-weld flange.

No mounds or loose pieces of urethane adhesive should remain on the pinch-weld flange. Do not remove all traces of urethane adhesive.

Power Windows System Components

The power window system consists of the following components

1. Driver window switch
2. Passenger window switch
3. Left rear window switch
4. Right rear window switch
5. Window motors in each of the doors or window motors in the front doors only
6. 30A Fuse
7. Body control module (BCM)

Power Window System

This vehicle can be configured as follows

1. All doors with express up and express down window motors
2. Driver and passenger doors with express up and express down power window motors with left rear and right rear express down only window motors
3. Driver with express up and express down power window motor with passenger, left rear and right rear express down only power window motors
4. Driver with express up and express down power window motor and passenger, left rear and right rear power window motors without any express functions
5. All doors window motors without any express functions
6. Driver and passenger doors with power window motors without any express functions with rear door manual crank windows

Scheme 32

Driver and Passenger Express Up and Express Down Window Motors

The driver and passenger doors contains a window motor is smart motor that will detect excessive resistance while performing the express up function and automatically reverse direction to prevent injury to any occupants that may become trapped between the closing window and the door frame. The automatic reverse safety feature can be overridden by pulling and holding the window switch.

The logic circuit within the window motor monitors the up, down and express signal circuits which are normally equal to B+ voltage. When a switch is used on the window switch, the contacts close causing a voltage drop within the appropriate signal circuit. The window motor will detect the voltage drop and will command the window to move in the direction requested.

The driver window switch communicates to the BCM by a serial data circuit. When the driver wishes to control the passenger window, the driver will use the appropriate switch on the driver window switch. When this switch is used, a serial data message is sent to the BCM requesting the passenger window motor command, the BCM will then send a serial data message to the passenger window motor which will then move in the direction requested.

Left Rear, Right Rear Express Up and Express Down Window Motors

The left rear and right rear doors contains a window motor is smart motor that will detect excessive resistance while performing the express up function and automatically reverse direction to prevent injury to any occupants that may become trapped between the closing window and the door frame. The automatic reverse safety feature can be overridden by pulling and holding the window switch.

The logic circuit within the window motor monitors the up, down and express signal circuits which are normally equal to B+ voltage. When a switch is used on the appropriate rear window switch, the contacts close causing a voltage drop within the appropriate signal circuit. The window motor will detect the voltage drop and will command the window to move in the direction requested.

The driver window switch communicates to the BCM by a serial data circuit. When the driver wishes to control a rear window, the driver will use the appropriate switch on the driver window switch. When this switch is used, a serial data message is sent to the BCM requesting the rear window motor command, the BCM will then send a serial data message to the rear window motor which will then move in the direction requested.

Scheme 33

All Doors with Express Down Window Motors

For the driver, passenger, right rear and left rear doors, when their window switch is pressed in the down position, battery positive voltage is applied to their respective window motor control circuit and ground to the other window motor control circuit causing that window to open. When the individual window switch is pulled in the up position, voltage and ground is applied to the window motor in the opposite direction causing that window to close. The return path to ground is supplied through the inactive control circuit being normally grounded through the window switch.

Each window switch communicates to the BCM by a serial data circuit. When the driver wishes to control the passenger, left rear or right rear window, the driver will use the appropriate switch on the driver window switch. When this switch is used, a serial data message is sent to the BCM requesting a window motor command, the BCM will then send a serial data message to the appropriate door window switch which will then command that window to move in the direction requested.

Scheme 34

Power Windows Without Express Functions

The driver power window switch contains switches that controls the functions of the driver window motor and also allows the driver to remotely control the functions of the passenger, left rear and right rear power window motors

Battery voltage is supplied to the driver power window switch through the accessory voltage supply circuit. The driver 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 driver power window switch. When the driver 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 driver power window motor. Since the other side of the driver power motor is connected to ground through the normally closed contacts of the up switch, the driver window travels down. By placing the driver power window switch in the up position, the polarity of the driver power window motor is reversed and the window travels up.

Battery voltage is supplied to the front passenger power window switch through the accessory voltage supply circuit. Ground for the passenger power window motor is supplied through normally closed up and down contacts of both the front passenger power window switch and the driver power window switch. When the front passenger power window 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 front passenger power window motor. Since the other side of the front passenger power motor is connected to ground through the normally closed up contacts of both the front passenger and driver power window switches, the window travels down. By placing the front passenger power window switch in the up position, the polarity of the power window motor is reversed and the window travels up.

The rear power window switches receive battery voltage through the window lockout control circuit if the window lockout function is disabled. Ground for the rear passenger power window motors is supplied through normally closed up and down contacts of both the rear passenger power window switches and the driver power window switch. When the either rear passenger power window 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 rear passenger power window motor. Since the other side of the rear passenger power motor is connected to ground through the normally closed up contacts of both the rear passenger and driver power window switches, the window travels down. By placing the rear passenger power window switch in the up position, the polarity of the power window motor is reversed and the window travels up.

Lockout Switch Feature

The driver power window switch contains a window lockout switch, when the driver presses the window lockout switch, a serial data message is sent to the BCM which will send a disable command to the rear window switches, deactivating them. The rear windows will still function normally from the switches on the driver window switch.

For vehicles without express functions, the driver power window switch contains a window lockout switch. The window lockout switch completes or interrupts the window lockout control circuit. If the window lockout switch is enabled, there is no voltage available at the rear power window switches and rear power window will not operate from the rear power window switches. The rear power windows will operate from the driver power window switch.

Rear Window Defogger System Components

The rear window defogger system consists of the following components

1. HVAC control module
2. Underhood ruse block (Contains rear defogger PCB relay)
3. Rear defogger grid
4. Driver Outside Rearview Mirror
5. Passenger Outside Rearview Mirror
6. 30A fuse

Scheme 35

Rear Window Defogger Operation

The rear defog control system utilizes a single zone backlight design, driven with a single relay configuration. Additionally, up to two outside rear view mirrors can be heated if equipped. A switch for the customer to control the system is provided within the HVAC control module, also included in the HVAC control module is an indicator to inform the customer with the current state of the system. The system is only operational when engine is running or during remote start.

Pressing the heated rear window switch on the HVAC control module causes the HVAC control module to provide voltage to the coil side of the rear defogger relay, this will energize the relay causing the relay switch contacts to close allowing B+ voltage to flow through the rear defogger grid control circuit to the rear defogger grid.

When the rear heated window switch is pressed and the engine is running, the rear defog control system will remain active for 10 minutes. After the initial cycle has lapsed, pressing the switch again will continue rear window defogger operation, but the cycle will only last 5 minutes. The rear defog control system will function continuously if the vehicle speed is greater than 70 kilometers per hour (45 mph).

Heated Mirrors

The heated mirrors are also controlled through the rear defogger relay. Whenever the rear window defogger is turned on battery voltage is supplied to the mirror heater elements through the left and right mirror heater element control circuits.

Stationary Window Description

Most stationary windows, specifically windshields, are retained to the body with adhesive which adheres the window to the body, increasing structural integrity. The reinstallation of the windows with adhesive requires complete replacement of the adhesive bead, and is known as the full cut method. All stationary windows must use a adhesive systems which meet GM Specification GMW-15672.

Urethane Adhesive Description

For replacement of any adhesive-installed window, use the full cut method only.

Use an adhesive that is approved by GM, Specification GMW-15672.

Use these materials based on specific manufacturer. Do NOT intermix primers or adhesives from one manufacturer to another.

Always follow the system manufacturers instructions for application, handling, and curing.

Special Tools

Illustration Tool Number/ Description BO-24402-A J-24402-A Glass Sealant Cold Knife Remover BO-38778-2 J-38778-2 Door Trim Pad Clip Remover BO-39032 J-39032 Stationary Glass Removal Tool BO-39040 J-39040 Quarter Window Remover BO-0201964 S-0201964 Bonded-Glass Removing Device Brazil-Use local equivalent

Scheme 36

Scheme 37

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Symptom Byte List
• WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Front Compartment Fuse Block Replacement
• Checking Aftermarket Accessories
• Retained Accessory Power Malfunction
• Windshield Wiper Arm Replacement
• Remote Control Door Lock Receiver Replacement (Without UFL and LDW)
• Inside Rearview Mirror Replacement
• Windshield Garnish Molding Replacement (Encore)
• Glass and Sheet Metal Handling Warning
• Fastener Caution
• Cracked Window Warning
• Rear End Spoiler Replacement
• Defroster Outlet Warning
• DTC B0283
• Liftgate Window Replacement
• Symptoms - Fixed and Moveable Windows
• Special Tools
• Adhesive Installation of Windshields
• Front Side Door Window Rear Guide Replacement
• Adhesive Installation of Liftgate Windows