B051D Possible Causes
- Faulty Right Side Assist Step Position Sensor
- Right Side Assist Step Position Sensor harness is open or shorted
- Right Side Assist Step Position Sensor circuit poor electrical connection
- Faulty Assist Step Control Module (ASC)
First diagnose B051D code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
B051D Tech NotesB051D 62 Right Side Assist Step Position Sensor Circuit Actuator Stuck Open
B051D 63 Right Side Assist Step Position Sensor Circuit Actuator Stuck Closed
B051D 29 Right Side Assist Step Position Sensor Circuit Too Few Pulses
B051D 2A Right Side Assist Step Position Sensor Circuit Too Many Pulses
B051D 22 Right Side Assist Step Position Sensor Circuit Low Time < Minimum
Cost of diagnosing the B051D code
Labor: 1.0The cost of diagnosing the B051D code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B051D Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B051D MeaningThe Assist Step Control Module (ASC) controls the running board actuators to extend or retract the running boards. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 10-volt reference source voltage to the potentiometer. The ASC control module monitors the voltage drop across the potentiometer on the position signal circuit. When the actuator shaft rotates, the voltage on the position signal circuit changes. The ASC control module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The ASC module controls the direction of the actuator by changing the polarity of the control circuits.
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