The body control module (BCM) applies a ground through the brake sensor reference low circuit to the brake position sensor. The BCM supplies a 5-volt reference through the brake sensor reference voltage circuit to the brake position sensor. When the brake pedal is being applied, the brake position sensor then sends a variable voltage signal through the brake sensor signal circuit to the BCM.
The battery voltage must be between 9-16 volts.
DTC C0278 00 will set if the brake position sensor is out of calibration.
• | This DTC will clear on current status after the condition for setting the fault is corrected. |
• | A history DTC will clear after 100 consecutive ignition cycles with out a fault present. |
• | History and current DTCs can be cleared using a scan tool. |
• | If DTC C0278 00 sets then recalibrate the brake position sensor. |
• | Perform a visual inspection for a loose or poor connection at all related components. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. |
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the scan tool display DTC C0278 00? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 | Recalibrate the brake position sensor. Did you complete the repair? | Go to Step 4 | -- |
4 |
Does the scan tool display DTC C0278 00? | Go to Step 5 | Go to Step 6 |
5 |
Important: After replacing the brake position sensor, perform the calibration procedure. Refer to Brake Pedal Position Sensor Calibration Description and Operation . Replace the brake position sensor. Refer to Brake Pedal Position Sensor Replacement . Did you complete the replacement? | Go to Step 6 | -- |
6 |
Does the DTC reset? | Go to Step 2 | System OK |