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 low voltage when the signal is commanded on, it records this fault code. This fault code can be caused by a short circuit to ground in the starter lockout relay, OEM harness, or connectors.
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.
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.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 559 (ISC/ISL) PID: 157 SPN: 157 FMI: 18 Injector Metering Rail 1 Pressure – Data Valid But Below Normal Operating Range – Moderately Severe Level. The engine control module (ECM) has detected that fuel pressure is lower than commanded pressure.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 559 (ISB/QSB3.3) PID: 157 SPN: 157 FMI: 18 Injector Metering Rail 1 Pressure – Data Valid but Below Normal Operational Range – Moderately Severe Level. The ECM has detected that the fuel pressure is lower than commanded pressure.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 556 (ISC/ISL) PID: 101 SPN: 101 FMI: 0 Crankcase Pressure – Data Valid but Above Normal Operational Range – Most Severe Level.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 556 (ISB/QSB3.3) PID: 101 SPN: 101 FMI: 0 Crankcase Pressure – Data Valid but Above Normal Operational Range – Most Severe Level.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 555 (ISC/ISL) PID: 101 SPN: 101 FMI: 0 Crankcase Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level.