Chevrolet Trax: DTC B3664: Sunroof position select switch

DIAGNOSTIC CODE INDEX

DTC B3664: SUNROOF POSITION SELECT SWITCH

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• 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 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

Sunroof Schematics (Encore), Sunroof 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

Sunroof Description and Operation

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• 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

1. Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module.
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 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

1. Ignition Off, disconnect the harness connector at the K61 Sunroof Control Module.
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 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

1. Ignition OFF, disconnect the harness connector at the K61 Sunroof Control Module.
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 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.

• Sunroof Switch Replacement
• Sunroof Module Assembly Replacement
• Control Module References for sunroof control module replacement, programming and setup

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