Brake Pressure Sensor Supply Circuit

Where it lives

For C05C9, the circuit described runs through the sensor. The description of C05C9 reports a fault at the sensor.

Check these first

• An open or short in the shared brake pressure sensor supply
• A shorted sensor pulling the shared supply down
• A chafed harness on the sensor supply wire
• A control module reference supply fault
• Corrosion in a connector on the sensor supply circuit

What to do next

1. Check the shared sensor supply voltage at the sensor connector
2. Test the sensor supply wire for opens and shorts
3. Unplug one pressure sensor at a time to find a shorted sensor
4. Inspect the sensor supply harness and connectors for damage
5. Repair the supply circuit or replace the shorted sensor
6. Clear the code and retest

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