Circuit Description
Battery voltage to the fuel pump is passed to the engine control module (ECM) through the controller area network datalink.
Component Location
The voltage measurement is located within the pump control module.
Shop Talk
1) This fault is set when the fuel pump control module registers a voltage value outside of its threshold limits (6.5 to 18-volt) for 0.5 second.
2) The fuel pump fully compensates for voltage fluctuations within its signal range check. Excessive voltage (more than 24-volt) will damage the pump controller.
3) Troubleshooting must focus on sources of high or low voltage or engine grounding.
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
Cummins ISB CM550 (1990-94) Fault Code: 362 PID: SID 251 SPN: 1076 FMI: 4 Fuel Valve High Current Error
