Brake Booster Motor B Position Sensor Circuit/Open

Where it lives

For C058B, the circuit described runs through the sensor. The description of C058B reports the sensor as open.

Check these first

• An open in the brake booster motor B position sensor signal wire
• An unplugged or loose position sensor connector
• A broken wire in the position sensor harness
• A failed motor B position sensor with an internal open
• A bent or pushed out pin in the position sensor connector

What to do next

1. Check the motor B position sensor connector for a loose or unplugged fit
2. Test the position sensor signal wire for an open
3. Check the position sensor reference and ground circuits
4. Measure the position sensor resistance for an internal open
5. Replace the motor B position sensor if the wiring tests good
6. Clear the code and retest

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