Cummins ISB CM550 (1990-94) Fault Code: 367 PID: 370 SPN: FMI: Fuel Pump Speed/Position Sensor Signal Lost

Circuit Description
This fault code indicates that the fuel pump speed/position signal is lost.

Component Location
The speed/position sensor is located in the fuel pump.

Shop Talk
The fuel pump determines its speed and position in relation to the engine by referencing an
internal tone wheel gap-analog signals are converted to digital.
If the digital signal is not available or if the gap of the incremental angle sensor tone wheel is
not recognized, the pump controller will set a fault code. Also, rapid speed changes, stalling,
or inlet pressure under 21 kPa [3 psi] can cause this fault code to set.