Cummins ISB CM850 (2003-06) Fault Code: 584 PID: SID 39 SPN: 677 FMI: 3 Starter Relay Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at starter lockout circuit.
Cummins ISB CM850 (2003-06) Fault Code: 584 PID: SID 39 SPN: 677 FMI: 3 Starter Relay Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at starter lockout circuit.
The ECM monitors the voltage level on this circuit. If it detects a voltage when the signal is commanded off, it records this fault code.
Possible causes:
1)Open circuit in the starter lockout relay, OEM harness, or connectors
2)Short circuit to a voltage source in the OEM harness or relay.
Possible repairs:
1)Replace the starter lockout relay.
2)Replace the OEM harness.
3)The removal and installation of the connector may correct the fault.
4)Replace the ECM.
![International Truck ISIS - Oncommand Service Information Q4.2020 [04.2020]](https://www.ecuforcetruck.com/wp-content/uploads/2022/01/OnCommand-2020-1-300x300.png)
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