Cruze

DTC B2745

The body control module (BCM) monitors the traction control switch. When the traction control switch is pressed once, the BCM will request the electronic brake control module (EBCM) via serial data to disable the traction control. When the traction control switch is pressed for 5 s, the BCM will request the EBCM to disable the stability control. The EBCM will request the instrument cluster via serial data to turn the traction control off and stability control off indicator ON to notify the driver of the deactivation.

Ignition ON.

The BCM detects a short to ground on the signal circuit.

The BCM ignores the traction control switch signal input.

A current DTC clears when the diagnostic runs and passes.

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Observe the scan tool BCM Traction Control Switch parameter while pressing and releasing the traction control switch. The reading should change between Active and Inactive.

1. Ignition OFF, disconnect the harness connector at the S48C Multifunction Switch - Instrument Panel 1.
2. Test for less than 5 Ω between the ground circuit terminal 4 and ground.

⇒	If greater than the specified value, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool BCM Traction Control Switch parameter is No.

⇒	If not the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K9 Body Control Module.

4. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground.
5. Verify the scan tool BCM Traction Control Switch parameter is Yes.

⇒	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 K9 Body Control Module.

6. If all circuits test normal, test or replace the S48C Multifunction Switch - Instrument Panel 1.

Static Test

1. Ignition OFF, disconnect the harness connector at the S48C Multifunction Switch - Instrument Panel 1.
2. Test for infinite resistance between the signal circuit terminal 2 and the ground circuit terminal 4 with the switch in the released position.

⇒	If less than the specified value, replace the S48C Multifunction Switch - Instrument Panel 1.

3. Test for less than 5 Ω between the signal circuit terminal 2 and the ground circuit terminal 4 with the switch in the pressed position.

⇒	If greater than the specified value, replace the S48C Multifunction Switch - Instrument Panel 1.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References