B3664
DTC B3664
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.
DTC Descriptors
DTC 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
Diagnostic Fault Information
Circuit/System Description
The sunroof position select switch is connected directly to the controller. The sliding glass switch provide detent positions for open, express open, off, close, and express close. The sunroof position select 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 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 module has detected and reported via serial data that the sunroof position select switch high signal circuit is shorted to ground.
B3664 05
The sunroof module has detected and reported via serial data that the sunroof position select switch high signal circuit is open or shorted to voltage.
B3664 59
The sunroof module has detected and reported via serial data that the sunroof position select switch high signal has been the same active position for 20 s 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 position select switch high signal circuit.
Reference Information
Schematic Reference
Sunroof Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views Sunshade - Left Front
Description and Operation
Sunroof Description and Operation (Tilt and Slide 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
Circuit/System Testing
Note: Because of the accessibility of the sunroof switch, perform the component testing before beginning the 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
1. Ignition OFF, disconnect the harness connector at the M69 Sunroof Motor.
2. 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 M69 Sunroof Motor.
• 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
1. Ignition Off, disconnect the harness connector at the M69 Sunroof Motor.
2. 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 M69 Sunroof Motor.
• 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
1. Ignition OFF, disconnect the harness connector at the M69 Sunroof Motor.
2. 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
3. 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 M69 Sunroof Motor.
• If Short to Ground
7. All OK.
Component Testing
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 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 Sunroof Switch Replacement
* Sunroof Motor/Actuator Replacement Service and Repair
* Control Module References Control Module References