Eaton Gen 1 (AutoShift) Fault Code: 51 PID: PID 60 FMI: 2 Rail Select Sensor

Overview:
This code indicates an electrical failure of the rail select sensor on the electric shifter.

Detection:
Starting at key-on and throughout operation, the Transmission Controller constantly monitors the feedback from the sensor. If the feedback is below 10% or above 90% of the sensor’s full value, the fault code is set. This type of failure represents a short to ground or battery. The Transmission Controller also monitors the sensor feedback for a zero value, indicating an open circuit.

Fallback:
This fault causes an In Place fallback.

Required Tools:
1) Basic Hand Tools
2) Digital Volt/Ohm Meter
3) AutoSelect/AutoShift Troubleshooting Guide

Possible Causes:
1) Damaged transmission harness
2) Mechanical connection failure in electric shifter
3) Malfunctioning rail select sensor
4) Malfunctioning transmission ECU