Cruze

Stop Lamps Malfunction

The brake pedal position (BPP) sensor is used to sense the action of the driver application of the brake pedal. The brake pedal position (BPP) sensor provides an analogue voltage signal that will increase as the brake pedal is applied. The body control module (BCM) provides a low reference signal and a 5 V reference voltage to the brake pedal position (BPP) sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery voltage to the stop lamp control circuit and centre high mounted stop lamp control circuit. When the control circuit is energised the stop lamps are illuminated.

Schematic Reference

Exterior Lamps Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Exterior Lighting Systems Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Ignition OFF, disconnect the harness connector at the B22 Brake Pedal Position Sensor.
2. Ignition OFF, test for less than 5 Ω between the low reference circuit terminal 3 and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

3. Ignition ON, command the Brake Lamp Command test with a scan tool. The brake lamps should turn ON and OFF when changing between the commanded states.

⇒	If the brake lamps did not turn ON and OFF replace the K9 Body Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.