Pedal Position Input Short To Ground
Table of contents
B2971 MERCURY Possible Causes
- Adjustable Pedal Motor harness is open or shorted
- Adjustable Pedal Motor circuit poor electrical connection
- Faulty Memory Set Switch
- Faulty Adjustable Pedal Switch
- Faulty Adjustable Pedal Motor
- Faulty Driver seat module (DSM)
How do I fix code B2971 MERCURY?
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 connector’s pins.
Cost of diagnosing the B2971 MERCURY code
The cost of diagnosing the B2971 MERCURY code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B2971 MERCURY Description
The adjustable pedal memory function utilizes a Hall-effect position sensor. The Driver Seat Module (DSM) supplies a signal feed circuit to the position sensor and a reference signal return circuit. Each position sensor sends a signal voltage back to the DSM used to monitor the position of the adjustable pedals. The signal voltage from the adjustable pedal Hall-effect sensor to the DSM provides an indication to the DSM of whether or not the adjustable pedal motor is stalled. When the driver sets a pedal position in the DSM, it stores the value of where the adjustable pedals are located using a time frame of motor operation. When the driver requests a return to a pedal position in memory, the DSM operates the adjustable pedal motor until the adjustable pedals output matches the time frame stored in memory. If the memory function is not utilized, the adjustable pedal switch can also be used for normal operation of the adjustable pedals system. The DSM receives a voltage reference from the adjustable pedals switch. The DSM interprets this and then operates the adjustable pedals in the commanded direction.