CM850 Electronic Control System – FAULT CODE 584

Starter Relay Circuit – Voltage Above Normal or Shorted to High Source


Fault Code: 584
PID: S39
SPN: 677
FMI: 3/3
LAMP: Amber

Starter Relay Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at starter lockout circuit.

Either the engine will not start or the engine will not have starter lockout protection.

Starter Relay Circuit

Circuit Description

The starter lockout relay is controlled by the ECM through the starter lockout relay signal circuit. The relay prevents the starter from being engaged when the engine is running. The relay return circuit is dependent on OEM wiring. It may be wired back to the ECM on some vehicles or wired to chassis or block ground on others. Consult the OEM wiring diagram for return circuit details.

Component Location

The starter lockout relay is installed by the vehicle OEM. Refer to the OEM service manual for exact location.

Shop Talk

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.This fault can be caused by:

  • Open circuit in the starter lockout relay, OEM harness, or connectors
  • Short circuit to a voltage source in the OEM harness or relay.

Refer to Troubleshooting Fault Code t05-584

Last Modified:  08-Jul-2010