Power Sunroof/Sunshade Malfunction
Power Sunroof/Sunshade Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The 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 and sunshade control modules are configured as the slaves.
As the system master, the BCM uses the serial data communication bus to enable or disable sunroof and sunshade operation, communicate vehicle information to each controller, and request sunroof or sunshade movement. The sunroof/sunshade controllers provide 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
Reference Information
Schematic Reference
Sunroof Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Sunroof Description and Operation (Spoiler System) Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
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 - Power Sunroof Malfunction.
• 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 - Power Sunroof Malfunction.
• If the sunroof opens and closes to the vent position
4. Verify the sunshade opens and closes when pressing the open and close sunshade switch.
• If the sunshade does not open or close
Refer to Circuit/System Testing - Power Sunshade Malfunction.
• If the sunshade opens and closes
5. Verify the sunshade opens pressing the open sunroof switch.
• If the sunshade does not open
Refer to Circuit/System Testing - Power Sunshade Malfunction.
• If the sunshade opens
6. Verify the sunshade opens pressing the open sunroof vent switch.
• If the sunshade does not open
Refer to Circuit/System Testing - Power Sunshade Malfunction.
• If the sunshade opens
7. All OK.
Circuit/System Testing
Note: Because of the accessibility of the switches, perform the switch component testing before beginning the circuit/system testing.
Power Sunroof Malfunction
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
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
3. Test for less than 10 ohms between the ground circuit terminal 8 and ground.
• If 10 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
4. 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
1. Ignition OFF.
2. 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
1. Ignition OFF.
2. 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
5. Test for less than 1 V between the circuit terminals listed below and ground:
* Signal circuit terminal 3
* Signal circuit terminal 5
• If 1 V or greater
1. Disconnect the harness connector at the S72 Sunroof Switch.
2. Test for less than 1 V between the signal circuit and ground:
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, test or replace the S72 Sunroof Switch.
• If less than 1 V
6. Ignition OFF.
7. Test for infinite resistance between the circuit terminals listed below and ground:
* Signal circuit terminal 3
* Signal circuit terminal 5
• If less than infinite resistance
1. Disconnect the harness connector at the S72 Sunroof Switch.
2. Test for infinite resistance between the signal circuit and ground:
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, test or replace the S72 Sunroof Switch.
• If infinite resistance
8. Disconnect the harness connector at the S72 Sunroof Switch.
9. Test for less than 5 ohms between the circuit terminals listed below:
* S72 Sunroof Switch signal circuit terminal 4 and K61 Sunroof Control Module signal circuit terminal 5
* S72 Sunroof Switch signal circuit terminal 1 and K61 Sunroof Control Module signal circuit terminal 3
• 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.
Power Sunshade Malfunction
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K62 Sunroof Sunshade Motor 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
1. Ignition OFF, disconnect the harness connector at the K62 Sunroof Sunshade Motor Module.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
3. Test for less than 10 ohms between the ground circuit terminal 9 and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K62 Sunroof Sunshade Motor Module.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
4. 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
1. Ignition OFF.
2. 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
1. Ignition OFF.
2. 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 K62 Sunroof Sunshade Motor Module.
• If the test lamp illuminates
5. Test for less than 1 V between the circuit terminals listed below and ground:
* Signal circuit terminal 3
* Signal circuit terminal 5
• If 1 V or greater
1. Disconnect the harness connector at the S90 Sunroof Sunshade Switch.
2. Test for less than 1 V between the signal circuit and ground:
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, test or replace the S90 Sunroof Sunshade Switch.
• If less than 1 V
6. Ignition OFF.
7. Test for infinite resistance between the circuit terminals listed below and ground:
* Signal circuit terminal 3
* Signal circuit terminal 5
• If less than infinite resistance
1. Disconnect the harness connector at the S90 Sunroof Sunshade Switch.
2. Test for infinite resistance between the signal circuit and ground:
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, test or replace the S90 Sunroof Sunshade Switch.
• If infinite resistance
8. Disconnect the harness connector at the S90 Sunroof Sunshade Switch.
9. Test for less than 5 ohms between the circuit terminals listed below:
* S90 Sunroof Sunshade Switch signal circuit terminal 4 and K62 Sunroof Sunshade Motor Module signal circuit terminal 5.
* S90 Sunroof Sunshade Switch signal circuit terminal 1 and K62 Sunroof Sunshade Motor Module signal circuit terminal 3.
• If greater than 5 ohms
Repair the open/high resistance in the circuit.
• If less than 5 ohms
10. Test or replace the K62 Sunroof Sunshade Motor Module.
Component Testing
Sunroof/Sunshade Switch
Static Test
1. Ignition OFF, disconnect the harness connector at the S72 Sunroof Switch or S90 Sunroof Sunshade 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 while pressing the open switch.
• If not between 390-480 ohms
Replace the S72 Sunroof Switch.
• If between 390-480 ohms
4. Test for 88-107 ohms between the control terminal 4 and the low reference terminal 1 while pressing the express open switch.
• If not between 88-107 ohms
Replace the S72 Sunroof Switch.
• If between 88-107 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 840-1030 ohms between the control terminal 4 and the low reference terminal 1 while pressing the express close switch.
• If not between 840-1030 ohms
Replace the S72 Sunroof Switch.
• If between 840-1030 ohms
7. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Sunroof Switch Replacement Service and Repair
* Sunroof Sunshade Switch Replacement Sunroof Sunshade Switch Replacement
* Sunroof Window Motor Replacement Service and Repair
* Sunroof Sunshade Motor Replacement Sunroof Sunshade Motor Replacement
* Control Module References Control Module References for sunroof/sunshade motor/actuator replacement, programming and setup