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Contents Wiring diagrams Section: Sun Roof/t-Top/convertible Top All sections

Sunroof System Buick Encore I

Sun Roof/t-Top/convertible Top 12 illustrations ~5471 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Sunroof Module Bolt9 N.m80 lb in
Sunroof Module Bracket Screw9 N.m80 lb in
Sunroof Sunshade Bolt9 N.m80 lb in
Sunroof Window Motor Bolt4 N.m36 lb in
Sunroof Window Screw4 N.m36 lb in

Fastener Tightening Specifications

Scheme 1

Scheme 1: Power Sunroof
Scheme 1: Power Sunroof

Scheme 2

Scheme 2: Power Sunroof
Scheme 2: Power Sunroof

Diagnostic Code Index

DTCDescription
DTC B3664DTC B3664 02 Sunroof Position Select Switch High Signal Circuit Short to Ground DTC B3664 05 Sunroof Position Select Switch High Signal Circuit High Voltage/Open DTC B3664 59 Sunroof Position Select Switch High Signal Circuit Protection Time-Out
DTC B3697DTC B3697 00 Sunroof Actuator Malfunction DTC B3697 39 Sunroof Actuator Internal Malfunction DTC B3697 42 Sunroof Actuator Calibration Not Programmed DTC B3697 4B Sunroof Actuator Calibration Not Learned
DTC B369CDTC B369C 02 Sunroof Tilt Position Select Switch Circuit Short to Ground DTC B369C 05 Sunroof Tilt Position Select Switch Circuit High Voltage/Open DTC B369C 59 Sunroof Tilt Position Select Switch Circuit Protection Time-Out

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.

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
SignalB3664 02B3664 05B3664 05
Low Reference11
1. Power Sunroof Slide Malfunction

Circuit/System Description

The sunroof switch is connected directly to the sunroof control module and provides detent positions for open, express open, off, close, and express close. The sunroof switch completes the circuit between two signals proved by the sunroof control module, a reference ground input and a pull-up voltage provided by an analog to digital switch input. The sunroof switch places a different resistor ladder network in the circuit depending on the function selected.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

B3664 02

The sunroof control module has detected and reported via serial data that the sunroof switch signal is shorted to ground.

B3664 05

The sunroof control module has detected and reported via serial data that the sunroof switch signal is open or shorted to voltage.

B3664 59

The sunroof control module has detected and reported via serial data that the sunroof switch has been in the same active position for 20 seconds after the glass has stopped moving in the requested direction due to reaching the end of the allowable motion.

Action Taken When the DTC Sets

DTC B3664 is stored in the body control module (BCM) memory.

Conditions for Clearing the DTC

The BCM no longer detects a malfunction in the sunroof switch signal circuit.

Reference Information

Schematic Reference

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

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 Testing

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S72 Sunroof Switch. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 ohms between the low reference circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module. Test for less than 2 ohms in the low reference 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 K61 Sunroof Control Module. If less than 10 ohms
  3. Ignition ON.
  4. Verify the scan tool Slide Switch parameter is Short to Battery. If not Short to Battery Ignition Off, disconnect the harness connector at the K61 Sunroof Control Module. Test for infinite resistance between the signal circuit terminal 4 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K61 Sunroof Control Module. If Short to Battery
  5. Install a 5 A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 1.
  6. Verify the scan tool Slide Switch parameter is Short to Ground. If not Short to Ground Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module. Test for less than 1 V between the signal circuit terminal 4 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 K61 Sunroof Control Module. If Short to Ground
  7. All OK.

Component Testing

Sunroof Switch

Static Test

  1. Ignition OFF, disconnect the harness connector at the S72 Sunroof Switch.
  2. Test for 3.3-4.0k ohms between the control terminal 4 and the low reference terminal 1. If not between 3.3-4.0k ohms Replace the S72 Sunroof Switch. If between 3.3-4.0k ohms
  3. Test for 390-480 ohms between the control terminal 4 and the low reference terminal 1 while pressing the open switch. If not between 390-480 ohms Replace the S72 Sunroof Switch. If between 390-480 ohms
  4. Test for 88-120 ohms between the control terminal 4 and the low reference terminal 1 while pressing the express open switch. If not between 88-120 ohms Replace the S72 Sunroof Switch. If between 88-120 ohms
  5. Test for 1.6-2.0k ohms between the control terminal 4 and the low reference terminal 1 while pressing the close switch. If not between 1.6-2.0k ohms Replace the S72 Sunroof Switch. If between 1.6-2.0k ohms
  6. Test for 830-1030 ohms between the control terminal 4 and the low reference terminal 1 while pressing the express close switch. If not between 830-1030 ohms Replace the S72 Sunroof Switch. If between 830-1030 ohms
  7. All OK

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Sunroof Switch Replacement»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system)
  2. «Sunroof Module Assembly Replacement»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system)
  3. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for sunroof 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 sunroof glass is controlled by its own integrated motor/controller containing the necessary electronics, motor, hall effect position sensors, as well as the interface to the driver control switches. The motor/controller is capable of controlling motion based on control switch activation and serial data message commands from the body control module (BCM).

The ignition is ON.

B3697 00

The sunroof control module has detected and reported via serial data that the sunroof actuator has a malfunction.

B3697 39

The sunroof control module has detected and reported via serial data that the sunroof actuator has an internal malfunction.

B3697 42

The sunroof control module has detected and reported via serial data that the sunroof actuator is not programmed.

B3697 4B

The sunroof control module has detected and reported via serial data that the sunroof actuator calibration is not learned.

DTC B3697 is stored in the BCM memory.

The BCM no longer detects a malfunction in the sunroof actuator.

Schematic Reference

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

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. Ignition ON.
  2. Verify DTC B3697 42 or DTC B3697 4B is not set. If DTC B3697 42 or DTC B3697 4B is set Calibrate the K61 Sunroof Control Module. Refer to «Sunroof Motor/Actuator Initialization/Teach Process»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system__sunroof-motoractuator-initializationteach-process) . Verify DTC B3697 42 or DTC B3697 4B does not set while operating the sunroof. If DTC B3697 42 or DTC B3697 4B sets, replace the K61 Sunroof Control Module. If DTC B3697 42 or DTC B3697 4B does not set All OK. If DTC B3697 42 or DTC B3697 4B is not set
  3. Verify DTC B3697 00 or DTC B3697 39 is not set If DTC B3697 00 or DTC B3697 39 is set, replace the K61 Sunroof Control Module. If DTC B3697 00 or DTC B3697 39 is not set
  4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for sunroof 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.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
SignalB369C 02B369C 05B369C 05
Low Reference11
1. Power Sunroof Tilt Malfunction

The sunroof tilt switch is connected directly to the sunroof control module and provides detent positions for open, off and close. The sunroof tilt switch completes the circuit between two signals provided by the control module, a reference ground input and a pull-up voltage provided by the analog to digital switch input. The sunroof tilt switch places a different resistor ladder network in the circuit depending on the function selected. The controllers analog to digital switch input reads the resulting voltage range and determines the function.

The ignition is ON.

B369C 02

The sunroof control module has detected and reported via serial data that the sunroof tilt switch circuit is shorted to ground.

B369C 05

The sunroof control module has detected and reported via serial data that the sunroof tilt select switch circuit is open or shorted to voltage.

B369C 59

The sunroof control module has detected and reported via serial data that the sunroof tilt switch has been the same active position for 20 seconds after the glass has stopped moving in the requested direction due to reaching the end of the allowable motion.

DTC B369C is stored in the body control module (BCM) memory.

The BCM no longer detects a malfunction in the sunroof tilt switch circuit.

Schematic Reference

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

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 OFF and all vehicle systems OFF, disconnect the harness connector at the S88 Sunroof Tilt Switch. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 ohms between the low reference circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module. Test for less than 2 ohms in the low reference 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 K61 Sunroof Control Module. If less than 10 ohms
  3. Ignition ON.
  4. Verify the scan tool Sunroof Tilt Switch parameter is Short to Battery. If not Short to Battery Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module. Test for infinite resistance between the signal circuit terminal 4 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K61 Sunroof Control Module. If Short to Battery
  5. Install a 5 A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 1.
  6. Verify the scan tool Sunroof Tilt Switch parameter is Short to Ground. If not Short to Ground Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module. Test for less than 1 V between the signal circuit terminal 4 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 K61 Sunroof Control Module. If Short to Ground
  7. All OK.

Sunroof Ventilation Switch

Static Test

  1. Ignition OFF, disconnect the harness connector at the S88 Sunroof Tilt Switch.
  2. Test for 830-1030 ohms between the control terminal 4 and the low reference terminal 1. If not between 830-1030 ohms Replace the S88 Sunroof Tilt Switch. If between 830-1030 ohms
  3. Test for 88-120 ohms between the control terminal 4 and the low reference terminal 1 while pressing the open switch. If not between 88-120 ohms Replace the S88 Sunroof Tilt Switch. If between 88-120 ohms
  4. Test for 390-480 ohms between the control terminal 4 and the ground terminal 1 while pressing the close switch. If not between 390-480 ohms Replace the S88 Sunroof Tilt Switch. If between 390-480 ohms
  5. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Sunroof Switch Replacement»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system)
  2. «Sunroof Module Assembly Replacement»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system)
  3. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for sunroof control module replacement, programming and setup

Symptoms - Roof

IMPORTANTThe following steps must be completed before using the symptom tables.
  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 links.
  2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Sunroof Description and Operation»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system__sunroof-description-and-operation) .

Visual/Physical Inspection

  1. Inspect for aftermarket devices which could affect the operation of the systems. 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

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to Power Sunroof Malfunction in order to diagnose the symptom.

  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.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
B+11
Sunroof Switch SignalB3664 02B3664 05B3664 05
Sunroof Tilt Switch SignalB369C 02, 2B369C 05, 2B369C 05, 2
Sunroof Switch Low Reference1
Sunroof Control Module Ground1
1. Power Sunroof Malfunction 2. Sunroof Tilt Malfunction

The sunroof electrical system uses a master/slave configuration utilizing a serial data based system for communication. The body control module (BCM) is designated as the master, while the sunroof control modules is configured as the slave.

As the system master, the BCM uses the serial data communication bus to enable or disable sunroof operation, communicate vehicle information to each controller, and request sunroof movement. The sunroof control module provides system status and diagnostic information to the BCM for diagnostic reporting and operational purposes. The control switches places a different resistor ladder network in the circuit depending on the function selected. The controllers analog to digital switch input reads the resulting voltage range and determines the function.

Diagnostic Aids

  1. The sunroof glass is controlled by an integrated motor/controller containing the motor, electronics, and position sensors. If the motor and sunroof mechanism get out of sync the sunroof may operate erratically. To re-synchronize the motor and sunroof mechanism, perform the «Sunroof Motor/Actuator Initialization/Teach Process»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system__sunroof-motoractuator-initializationteach-process) .
  2. The sunroof control module provides obstacle/blockage detection. If the «Sunroof Motor/Actuator Initialization/Teach Process»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system__sunroof-motoractuator-initializationteach-process) is not carried out completely, the sunroof may stop and reverse slightly when it gets to the location where it needs to push down the windscreen. Make sure to complete the process.

Schematic Reference

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

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 sunroof opens and closes when pressing the open and close sunroof switch. If the sunroof does not open or close Refer to Circuit/System Testing. If the sunroof opens and closes
  3. Verify the sunroof opens and closes to the vent position when pressing the open and close sunroof vent switch. If the sunroof does not open or close to the vent position Refer to Circuit/System Testing - Vent Malfunction. If the sunroof opens and closes to the vent position
  4. All OK.
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K61 Sunroof Control Module. 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 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module. 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. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground. If 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 K61 Sunroof Control Module. If the test lamp illuminates
  4. Ignition ON.
  5. Test for less than 1 V between the signal circuit terminals listed below and ground: Terminal 3 - K61 Sunroof Control Module Terminal 5 - K61 Sunroof Control Module Terminal 6 - K61 Sunroof Control Module If 1 V or greater Repair the short to voltage on the signal circuit. If less than 1 V
  6. Ignition OFF.
  7. Test for infinite resistance between the signal circuit terminals listed below and ground: Terminal 3 - K61 Sunroof Control Module Terminal 5 - K61 Sunroof Control Module Terminal 6 - K61 Sunroof Control Module If less than infinite resistance Repair the short to ground on the signal circuit If infinite resistance
  8. Disconnect the harness connector at the S72 Sunroof Switch and the S88 Sunroof Tilt Switch.
  9. Test for less than 5 ohms between the circuit terminals listed below: S72 Sunroof Switch terminal 1 and K61 Sunroof Control Module terminal 3 S72 Sunroof Switch terminal 4 and K61 Sunroof Control Module terminal 5 S88 Sunroof Tilt Switch terminal 1 and K61 Sunroof Control Module terminal 3 S88 Sunroof Tilt Switch terminal 4 and K61 Sunroof Control Module terminal 6 If greater than 5 ohms Repair the open/high resistance in the circuit. If less than 5 ohms
  10. Test or replace the K61 Sunroof Control Module.

Tilt Malfunction

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S88 Sunroof Tilt Switch. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 ohms between the low reference circuit terminal 1 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module. Test for less than 2 ohms in the low reference 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 K61 Sunroof Control Module. If less than 10 ohms
  3. Ignition ON.
  4. Verify the scan tool Sunroof Tilt Switch parameter is Short to Battery. If not Short to Battery Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module. Test for infinite resistance between the signal circuit terminal 4 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K61 Sunroof Control Module. If Short to Battery
  5. Install a 5 A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 1.
  6. Verify the scan tool Sunroof Tilt Switch parameter is Short to Ground. If not Short to Ground Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module. Test for less than 1 V between the signal circuit terminal 4 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 K61 Sunroof Control Module. If Short to Ground
  7. All OK.

Sunroof Switch - Static Test

  1. Ignition OFF, disconnect the harness connector at the S72 Sunroof Switch.
  2. Test for 3.3-4.0k ohms between the control terminal 4 and the low reference terminal 1. If not between 3.3-4.0k ohms Replace the S72 Sunroof Switch. If between 3.3-4.0k ohms
  3. Test for 390-480 ohms between the control terminal 4 and the low reference terminal 1 while pressing the open switch. If not between 390-480 ohms Replace the S72 Sunroof Switch. If between 390-480 ohms
  4. Test for 88-120 ohms between the control terminal 4 and the low reference terminal 1 while pressing the express open switch. If not between 88-120 ohms Replace the S72 Sunroof Switch. If between 88-120 ohms
  5. Test for 1.6-2.0k ohms between the control terminal 4 and the low reference terminal 1 while pressing the close switch. If not between 1.6-2.0k ohms Replace the S72 Sunroof Switch. If between 1.6-2.0k ohms
  6. Test for 830-1030 ohms between the control terminal 4 and the low reference terminal 1 while pressing the express close switch. If not between 830-1030 ohms Replace the S72 Sunroof Switch. If between 830-1030 ohms
  7. All OK

Sunroof Tilt Switch - Static Test

  1. Ignition OFF, disconnect the harness connector at the S88 Sunroof Tilt Switch.
  2. Test for 830-1030 ohms between the control terminal 4 and the low reference terminal 1. If not between 830-1030 ohms Replace the S88 Sunroof Tilt Switch. If between 830-1030 ohms
  3. Test for 88-120 ohms between the control terminal 4 and the low reference terminal 1 while pressing the open switch. If not between 88-120 ohms Replace the S88 Sunroof Tilt Switch. If between 88-120 ohms
  4. Test for 390-480 ohms between the control terminal 4 and the ground terminal 1 while pressing the close switch. If not between 390-480 ohms Replace the S88 Sunroof Tilt Switch. If between 390-480 ohms
  5. All OK

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Sunroof Switch Replacement»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system)
  2. «Sunroof Tilt Position Switch Replacement»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system)
  3. «Control Module References»(/buick/encore/i-2012-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for sunroof control module replacement, programming and setup

Scheme 3

Scheme 3: Sunroof Air Deflector Replacement
Scheme 3: Sunroof Air Deflector Replacement
CalloutComponent Name
1Sunroof Air Deflector Procedure Open the sunroof window and sunshade to the full rear position. Use a suitable tool, unhook the front edge of the sunroof air deflector from the sunroof frame retainers. Grasp both left and right front corners of the air deflector wind screen, pull rearward on the wind screen releasing the front lower retainers. Unhook the rear air deflector springs from the frame. Cycle the sunroof window for a proper fit. NOTE: It may be necessary to transfer the louver vents to the new sunshade.
NOTE
It may be necessary to transfer the louver vents to the new sunshade.

Sunroof Air Deflector Replacement

Scheme 4

Scheme 4: Sunroof Air Deflector Cover Replacement
Scheme 4: Sunroof Air Deflector Cover Replacement
CalloutComponent Name
1Sunroof Air Deflector Cover Procedure Place the sunroof window in the vent position. Move the sunshade to the maximum rear position. Unclip the sunroof air deflector cover in front. Unclip the sunroof air deflector cover in rear. Remove the sunroof air deflector. Refer to Sunroof Air Deflector Replacement .

Sunroof Air Deflector Cover Replacement

Drain Hose Routing

Note. If the headliner is wet DO NOT remove any interior trim. Do the Plugged Drain Hose test first.

A drain trough encircles the sunroof window panel and water is drained off by the drain hoses located at each corner of the housing. A drain channel spans across the sunroof module at the rear of the window panel and directs water into the trough.

  1. The front drain hoses are routed out of the left and right corners of the plenum. The front hoses are installed through a rubber grommet that seals the hose tightly in the plenum.
  2. The rear drain hoses are routed through the left and right rear lower quarter panel and out of the body. The rear hoses are installed through a rubber grommet that seals the hose tightly in the quarter panel.

Plugged Drain Hose

In some vehicle it may be necessary to clean the sunroof drain hose by applying air from the lower end of the drain hose outlet instead of the upper drain hose outlet.

If a waterleak has occurred check for a plugged sunroof module drain hose at each corner of drainage system by doing the following

  1. Open the sunroof window.
  2. Locate each sunroof module drain hose outlet area.
  3. With a visual look, ensure that all the hoses are attached to the sunroof module drain outlet.
  4. Cover all of the interior before air is apply to the drain hose.
  5. To test for blockage, pour a small container of water into the module housing drain trough. Check each corner to confirm the drain hose is draining water if not go to step number 6.
  6. Use compressed air, 241 kPa (35 psi) or less to blow out any drain hose that is plugged.
  7. Test the system again.
  8. If remain plugged remove the blockage using the following steps. Push mechanics wire through the hose to remove the obstruction. Use compressed air in order to blow out any remaining material.
  9. If the hose remains plugged, check to see it is properly routed and does not have a kink. Refer to «Sunroof Housing Front Drain Hose Replacement»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) , or «Sunroof Housing Rear Drain Hose Replacement»(/buick/encore/i-2012-2016/remont/sun-rooft-topconvertible-top/#sunroof-system) .

Disconnected Drain Hose

Inspect the drainage system for disconnected drain hoses. Complete the following steps in order to obtain partial access to drain hoses and check for a disconnected hose.

  1. Open the sunroof window panel.
  2. Lower the headliner as needed. Refer to «Headlining Trim Panel Replacement (With Sunroof, Encore)»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) , «Headlining Trim Panel Replacement (With Sunroof, Trax)»(/buick/encore/i-2012-2016/remont/exteriorinterior-trim/#floor-coverings-and-headlinings) .
  3. Connect any disconnected hoses. If tie straps are required, connect the hose and apply tie strap.
  4. Ensure that the rear drain hoses are properly routed in the metal roof slot and taped in place.

Scheme 5

Scheme 5: Sunroof Housing Front Drain Hose Replacement
Scheme 5: Sunroof Housing Front Drain Hose Replacement
CalloutComponent Name
Preliminary Procedure It is only necessary to lower the headliner. Only do those step in headliner replacement that will lower the headliner enough to gain access to the part. Refer to Headlining Trim Panel Replacement (With Sunroof, Encore) , Headlining Trim Panel Replacement (With Sunroof, Trax) . Remove the instrument panel assembly. Refer to Instrument Panel Assembly Replacement (Trax) , Instrument Panel Assembly Replacement (Encore) .
1Sunroof Housing Front Drain Hose Retainers (Qty: 3) NOTE: Disengage the retaining clips on the A-pillar
2Sunroof Housing Front Drain Hose Tie Strap to Sunroof Frame Procedure Disconnect the sunroof drain hose from the sunroof frame spigot. NOTE: If the drain hose is retained with a tie strap it will be necessary to replace it.
3Sunroof Housing Front Drain Hose Grommet NOTE: Reposition the fabric insulator pad in the location of the grommet. Grasp the lower part of the grommet pull rearward releasing the grommet and drain hose as one from the cowl panel.
4Sunroof Housing Front Drain Hose Procedure When installing the drain hose, ensure that the routing of the end of the drain hose and grommet are installed through the access hole in the cowl panel to prevent interior water leaks. Water test the sunroof before installing instrument panel carrier. Water test vehicle to ensure No leaks.
NOTE
Disengage the retaining clips on the A-pillar
NOTE
If the drain hose is retained with a tie strap it will be necessary to replace it.
NOTE
Reposition the fabric insulator pad in the location of the grommet. Grasp the lower part of the grommet pull rearward releasing the grommet and drain hose as one from the cowl panel.

Sunroof Housing Front Drain Hose Replacement

Scheme 6

Scheme 6: Sunroof Housing Rear Drain Hose Replacement
Scheme 6: Sunroof Housing Rear Drain Hose Replacement
CalloutComponent Name
Preliminary Procedure It is only necessary to lower the headliner. Only do those step in headliner replacement that will lower the headliner enough to gain access to the part. Refer to Headlining Trim Panel Replacement (With Sunroof, Encore) , Headlining Trim Panel Replacement (With Sunroof, Trax) . Remove the rear quarter lower rear trim panel. Refer to Quarter Lower Rear Trim Panel Replacement .
1Sunroof Housing Rear Drain Hose Retainer (Qty: 4) NOTE: Disengage the retaining clips.
2Sunroof Housing Rear Drain Hose Tie Strap to Sunroof Frame Procedure Disconnect the sunroof drain hose from the sunroof frame spigot. NOTE: If the drain hose is retained with a tie strap it will be necessary to replace it.
3Sunroof Housing Rear Drain Hose Grommet NOTE: Grasp the grommet pull rearward to releasing it from the quarter panel.
4Sunroof Housing Rear Drain Hose Procedure When installing the drain hose, ensure that the routing of the end of the drain hose and grommet are installed through the access hole in the quarter panel to prevent rear compartment water leaks. Water test the sunroof before installing trim. Install the retainers that secure the drain hose to the upper sill panel and rear compartment . Water test vehicle to ensure No leaks.
NOTE
Disengage the retaining clips.
NOTE
If the drain hose is retained with a tie strap it will be necessary to replace it.
NOTE
Grasp the grommet pull rearward to releasing it from the quarter panel.

Sunroof Housing Rear Drain Hose Replacement

Scheme 7

Scheme 7: Sunroof Module Assembly Replacement
Scheme 7: Sunroof Module Assembly Replacement
CalloutComponent Name
Preliminary Procedures Remove the front sunroof window. Refer to Sunroof Window Replacement . It is only necessary to lower the headliner. Only do those steps in the headliner replacement procedure that will lower the headliner enough to gain access to the part. Refer to Headlining Trim Panel Replacement (With Sunroof, Encore) , Headlining Trim Panel Replacement (With Sunroof, Trax) . Disconnect the sunroof harness electrical connectors. Disconnect the drain hoses from the sunroof frame . Do not remove the drain hoses from the vehicle, disconnect the drain hoses at all the corners of the sunroof frame spigot only. Refer to Sunroof Housing Front Drain Hose Replacement , and Sunroof Housing Rear Drain Hose Replacement .
1Sunroof Module Bolt (Qty: 12) CAUTION: Refer to Fastener Caution . Procedure With an assistant, remove the sunroof frame from the vehicle and place it on a clean and dry prepared surface. Tighten 9 N.m (80 lb in)
2Sunroof Module Assembly Procedure Transfer all necessary components. Verify the sunroof motor initialization operation. Refer to Sunroof Control Module Programming and Setup . Water test vehicle before installing the trim to ensure No leaks. NOTE: A new sunroof module assembly does not include the sunroof window, motor, sunshade, or the finishing lace components. You must install the old components to the new sunroof module assembly.
CAUTION
Refer to Fastener Caution .
NOTE
A new sunroof module assembly does not include the sunroof window, motor, sunshade, or the finishing lace components. You must install the old components to the new sunroof module assembly.

Sunroof Module Assembly Replacement

Sunroof Motor/Actuator Initialization/Teach Process

Note. If the sunroof motor is new, cycle the sunroof seven (7) times to teach the motor/actuator initialization process. Perform the initialization/teach procedure on a reinstall motor or a new motor. Ensure the electrical harness on the headliner is connected to the sunroof motor, battery power is applied, and the ignition switch is ON.

  1. Press and hold the sunroof switch to the vent open position until the sunroof window stops in the vent open position.
  2. Again press and hold the sunroof switch to the vent open position for at least 10 seconds, then the window should move slightly.
  3. Verify the sunroof operation.

If the initialization/teach procedure is not carried out completely, it has to be started again.

Scheme 8

Scheme 8: Sunroof Actuator Motor Replacement
Scheme 8: Sunroof Actuator Motor Replacement
CalloutComponent Name
Preliminary Procedures Remove the roof console. Refer to Roof Console Replacement .
1Sunroof Window Motor Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Procedure Disconnect the electrical connector. Tighten 4 N.m (36 lb in)
2Sunroof Window Motor Procedure After repairs or replacement, the sunroof motor needs to be initialization/teach process. Refer to Sunroof Motor/Actuator Initialization/Teach Process . NOTE: Verify the operation of the sunroof motor before installing the roof console.
CAUTION
Refer to Fastener Caution .
NOTE
Verify the operation of the sunroof motor before installing the roof console.

Sunroof Actuator Motor Replacement

Scheme 9

Scheme 9: Sunroof Sunshade Replacement
Scheme 9: Sunroof Sunshade Replacement
CalloutComponent Name
Preliminary Procedure Remove the sunroof module. Refer to Sunroof Module Assembly Replacement .
1Sunroof Module Bracket Screw (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 9 (80 lb in)
2Sunroof Module Bracket
3Sunroof Sunshade Procedure The sunshade must be removed from the rear of the sunroof module. Slide the sunshade rearward releasing it from the module assembly.
CAUTION
Refer to Fastener Caution .

Sunroof Sunshade Replacement

Scheme 10

Scheme 10: Sunroof Tilt Position Switch Replacement
Scheme 10: Sunroof Tilt Position Switch Replacement
CalloutComponent Name
Preliminary Procedure Remove the roof console. Refer to Roof Console Replacement .
1Sunroof Tilt Position Switch Procedure Depress the tabs on the switch to remove from the roof console.

Sunroof Tilt Position Switch Replacement

Scheme 11

Scheme 11: Sunroof Switch Replacement
Scheme 11: Sunroof Switch Replacement
CalloutComponent Name
Preliminary Procedure Remove the roof console. Refer to Roof Console Replacement .
1Sunroof Switch Procedure Depress the tabs on the switch to remove from the roof console.

Sunroof Switch Replacement

Sunroof Window Height and Opening Fit Adjustment

  1. Cycle the sunroof window from full open to closed position.
  2. Loosen the adjusting screws on the window.
  3. Adjust the corners of the front window panel using the following guidelines: Adjust the front of the sunroof window to 0.0 mm - 1.0 mm (0.0 in - 0.04 in ) below the top surface of the roof panel. Adjust the rear center line of the sunroof window to 2 mm to 3 mm (0 .08 in to 0.12 in ) below the top surface of the roof panel.
  4. Tighten the sunroof window adjustment screws to 5 N.m (44 lb in).
  5. Cycle sunroof window through all positions.
  6. Inspect the sunroof window adjustment. Adjust if necessary.

Scheme 12

Scheme 12: Sunroof Window Replacement
Scheme 12: Sunroof Window Replacement
CalloutComponent Name
Preliminary Procedures Remove the sunroof air deflector cover. Refer to Sunroof Air Deflector Cover Replacement .
1Sunroof Window Bolt (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten 4 N.m (36 lb in)
2Sunroof Window Procedure Turn the ignition on. Lift up the sunroof window to the vent position. Slide the sunshade to the full rearward position. After the installation adjust the sunroof window. Refer to Sunroof Window Height and Opening Fit Adjustment .
CAUTION
Refer to Fastener Caution .

Sunroof Window Replacement

Sunroof Description and Operation

The tilt/slide sunroof consists of a moving glass panel and a manual sunshade. In the tilt/slide sunroof system the rear of the glass tilts up for venting and slides between the head liner and roof panel as it slides open. The glass is controlled by an integrated motor/controller. The sunshade has a mechanical connection to the glass causing it to open with the glass and keeping it from closing more than the glass.

The electrical portion of the tilt/slide sunroof system consists of

  1. Body control module (BCM)
  2. Sunroof glass control module
  3. Sunroof control switch assembly
  4. Vent control switch assembly
  5. Serial Data Bus

The sunroof electrical system uses a master/slave configuration utilizing a serial data based system for communication. The BCM is designated as the master, while the sunroof control module is configured as the slave.

As the system master, the BCM uses the serial data communication bus to enable or disable sunroof operation, communicate vehicle information to the sunroof controller, and request sunroof movement. The sunroof controller provides system status and diagnostic information to the BCM for diagnostic reporting and operational purposes.

The sunroof glass is controlled by a integrated motor/controller containing the necessary electronics, motor, hall effect position sensors, as well as the interface to the driver control switches. The motor/controller is capable of controlling motion based on control switch activation and serial data message commands from the system master.

The operational calibrations for the sunroof integrated motor/controller are loaded over the serial data communication bus by the sunroof system master, the BCM.

Sunroof Control Switches

The sunroof control switches are connected directly to the controller. The sliding glass switches provide detent positions for open, express open, off, close, and express close. The vent switches provide detent positions for open, off, and close. The control switch completes the circuit between two signals provided by the control module, a reference ground input and a pull-up voltage provided by an analog to digital switch input. The control switches place a different resistor ladder network in the circuit depending on the function selected. The controller's analog to digital switch input reads the resulting voltage range and determines the function as indicated in the included charts.

System Protection Functions

Normal operation of the sunroof system may be altered by one of the following events.

Obstacle or Blockage Detection

When enabled, obstacle detection is active only while the sunroof opening is approximately 4-200 mm (0.16-7.87 in) when moving in the closing direction. When an obstacle is detected in this range, the motion in the closing direction will stop and the sunroof will reverse direction for a short distance. The reversal shall complete regardless of operating Mode. If the travel is outside the range defined above, the sunroof will try to continue closing until it detects a motor stall condition or the system is at one of it's defined stops.

Motor Stall

If the sunroof is moving in the open or close direction and stops moving for 350 ms while the switch or serial data command is active, and no obstacle has been detected, the motor shall be turned off to prevent overheating.

Sunroof System Thermal Protection

The sunroof controllers have a thermal protection algorithm to protect the sunroof controller and motor from damage due to overheating conditions resulting from immoderately switch actuations. The thermal protection algorithm will cause any new sunroof open commands to be ignored until the motor is allowed to cool. A number of close requests during an over temperature condition will be allowed. If the thermal protection is triggered during an obstacle detection event, the sunroof reversal shall be finished.

Sunroof Operation

Open to Vent Position

When the sunroof is closed or in a partial vent position and the sunroof vent open switch becomes active, the sunroof shall begin to express open to the vent position. Sunroof motion shall cease when the sunroof reaches the vent position or if the sunroof sliding glass switch becomes active.

Close from Vent

When the sunroof is in the vent position and the sunroof vent switch enters the Close state, the sunroof will begin to express close the sunroof. Motion will continue until the sunroof has reached its fully closed position or if the sunroof sliding glass switch becomes active.

Normal Open (Non-Express)

When the sunroof is not in a vent position and the sunroof sliding glass switch is held in the Open position, the sunroof will begin opening. Motion will continue until the switch returns to the Off state or the vent switch transitions to any active state.

Sunroof Express Open

When the sunroof control switch transitions to the Express Open state and the sunroof is not in a vent position, the sunroof will express open until the controller determines the sunroof has reached the comfort stop position or the fully Open position, the switch transitions to another state after first returning to the Off position, or the vent switch transitions to an active state.

Normal Close (Non-Express)

When the sunroof switch is in the Close state and the sunroof is not in the vent position, the controller will begin moving the sunroof in the close direction. If the vent switch becomes active the motor will be turned off.

Sunroof Express Close

When the sunroof switch is in the Express Close state and the sunroof is not in a vent position, the sunroof will express close until the controller determines the sunroof has reached the fully closed position, or the switch transitions to another state after first returning to the Off position. The sunroof motion will cease if the switch transitions back to the Close or Express Close state after returning to the Off position first or the vent switch transitions to any active state.