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PACCAR PX-8 CM2150 (2007-09) Fault Code: 584 PID: SID 39 SPN: 677 FMI: 3 Starter Relay Driver Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at starter lockout circuit.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on Quickserve® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.

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)Clean, repair, or replace the OEM harness.
3)Repair or replace the OEM harness.
4)Replace the ECM.

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