Cummins ISL CM850 (2003-06) Fault Code: 2185 PID: SID 232 SPN: FMI: 3 Sensor Supply Voltage 4 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at +5 volt sensor supply circuit to the accelerator pedal position sensor.

This fault is logged when the ECM senses more than +5.25 volts on the accelerator pedal or lever position +5 volt supply line. This can be caused by a short circuit to a voltage source in the OEM harness or a short circuit to an actuator signal circuit that is greater than +5 volts.

Possible repairs:

1)Repair or replace the OEM harness.
2)Replace the ECM.