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.
Cummins ISB CM550 (1990-94) Fault Code: 366 PID: 1287 SPN: FMI: Fuel Pump Voltage Measurement Error
Cummins ISB CM550 (1990-94) Fault Code: 365 PID: SID 233 SPN: 1077 FMI: 4 Fuel Pump Voltage Out of Range Error Low
Cummins ISB CM550 (1990-94) Fault Code: 364 PID: SID 233 SPN: 1077 FMI: 9 Engine Control Module (ECM) to Pump Communications Error
Cummins ISB CM550 (1990-94) Fault Code: 364 PID: 1689 SPN: 1077 FMI: 9 Engine Control Module (ECM) to Pump Communications Error
Cummins ISB CM550 (1990-94) Fault Code: 363 PID: SID 251 SPN: 1076 FMI: 7 Fuel Pump Control Valve Feedback Error
Cummins ISB CM550 (1990-94) Fault Code: 363 PID: 251 SPN: 1076 FMI: 7 Fuel Pump Control Valve Feedback Error
