Cummins ISM CM875 (2003-06) Fault Code: 584 PID: S39 SPN: 677 FMI: 3/3 Starter Relay Driver Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at starter lockout circuit.

Description

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.
This fault can also be set active if the over crank protection feature (starter lockout) is enabled, but the engine/ECM is not wired to support it.

Possible repairs:

1)Replace the starter lockout relay.
2)Repair or replace the OEM harness.
3)Repair the source of the failed ground connection.