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 Descriptor
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, and 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 the LIN-Bus that the sunroof position select switch high signal circuit is shorted to ground.
B3664 05
The sunroof module has detected and reported via the LIN-Bus 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 the LIN-Bus 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 [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 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 Testing
Note:
Because of the accessibility of the sunroof switch, perform the component testing before beginning the Circuit/System Testing.
1. Ignition OFF, disconnect the harness connector at the S72 Sunroof Switch.
2. Test for less than 5 ohms between the low reference circuit terminal 1 and ground.
• If greater than the specified value, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool sunroof slide switch is short to battery.
• If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the K61 Sunroof Control Module.
4. Install a 5 A fused jumper wire between the signal circuit terminal 4 and the ground circuit terminal 1. Verify the scan tool sunroof slide switch is stuck.
• If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K61 Sunroof Control Module.
5. If all circuits test normal, test or replace the S72 Sunroof Switch.
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the S72 Sunroof Switch.
2. Test for 3.6-3.7 kohms between the switch terminals 1 and 4.
• If not within the specified range, replace the S72 Sunroof Switch.
3. Test for 430-440 ohms between the signal terminal 1 and the low reference circuit terminal 4 while pressing the open switch.
• If not within the specified range, replace the S72 Sunroof Switch.
4. Test for 96-100 ohms between the signal terminal 1 and the low reference circuit terminal 4 while pressing the express open switch.
• If not within the specified range, replace the S72 Sunroof Switch.
5. Test for 1.7-1.8 kohms between the signal terminal 1 and the low reference circuit terminal 4 while pressing the close switch.
• If not within the specified range, replace the S72 Sunroof Switch.
6. Test for 930-940 ohms between the signal terminal 1 and the low reference circuit terminal 4 while pressing the express close switch.
• If not within the specified range, replace the S72 Sunroof Switch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Sunroof Opening Position Switch Replacement Service and Repair
* Sunroof Actuator Motor Replacement Service and Repair
* Control Module References Control Module References for sunroof motor/actuator replacement, setup, and programming.