The instrument panel cluster (IPC) illuminates the stabilitrak indicator during the IPC bulb check or when the electronic brake control module (EBCM) sends a serial data message to the IPC commanding the indicator ON.

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.

Ignition On, with a scan tool command the IPC display test ON and OFF. The stabilitrak indicator should turn ON and OFF.

1. Ignition OFF, disconnect the harness connector at the traction control switch.
2. Test for less than 5 ohms between the ground circuit terminal H and ground.

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

3. Ignition ON, verify the scan tool BCM TCS Switch State parameter is Released.

⇒	If not the specified value, test the signal circuit terminal J for a short to ground. If the circuit tests normal, replace the BCM.

4. Install a 3A fused jumper wire between the signal circuit terminal J and the ground circuit terminal H. Verify the scan tool BCM TCS Switch State parameter is Pressed.

⇒	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 BCM.

5. Ignition ON, verify the scan tool BCM Traction Switch LED parameter is OFF.

⇒	If not the specified value, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the BCM.

6. Install a 3A fused jumper wire between the signal circuit terminal B and the ground circuit terminal H. Verify the scan tool BCM Traction Switch LED parameter is ON.

⇒	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 BCM.

7. If all circuits test normal, test or replace the traction control switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.