Circuit/System Testing
WARNING: This page is about a different car, the 2007 Saturn Outlook. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Fix any Brake System related DTCs or symptoms before using this diagnostic.
- Ignition ON, perform the brake pedal position (BPP) sensor calibration procedure and verify the BPP is calibrated properly. Refer to Brake Pedal Position Sensor Calibration .
- If the BPP sensor will not calibrate properly, replace the BPP sensor.
- Ignition ON, apply the brake pedal and observe the BPP sensor parameter.
- If the parameter reads Applied, refer to Stop Lamps Always On . If the stop lamps operate normal, replace the ECM.
- If the parameter reads Released, test the BPP sensor signal circuit for an open/high resistance or short to ground. If circuit tests normal, replace the ECM.