Cummins ISB CM850 (2003-06) Fault Code: 596 PID: 167 SPN: 167 FMI: 0 Electrical Charging System Voltage High – Data Valid But Above Normal Operating Range – Moderately Severe Level. High battery voltage detected by the battery voltage monitor feature.
This fault code is part of the Alternator Failure Warning feature. The ECM can increase idle speed and deactivate the idle decrement switch if idle speedup is enabled. View the Alternator Failure Warning feature settings using the INSITE? electronic service tool. Disabling the Alternator Failure Warning feature will also disable this fault code.
Make sure the ECM battery supply (+) is coming directly from the battery and not the starter.
1)Overcharged batteries caused by a malfunctioning alternator or regulator.
1)Repair the damaged connections.
2)Tighten the battery connections and clean the battery terminals.
3)Charge or replace the battery.
4)Repair or replace the alternator, regulator, and/or OEM wiring to the alternator.
Cummins ISB CM850 (2003-06) Fault Code: 595 (ISB) PID: 103 SPN: 103 FMI: 0 Turbocharger Number 1 speed high – warning level. High turbocharger speed has been detected.
Cummins ISB CM850 (2003-06) Fault Code: 595 (ISC) PID: 103 SPN: 103 FMI: 0 Turbocharger Number 1 Speed High – Data Valid but Above Normal Operational Range – Moderately Severe Level. High turbocharger speed has been detected.
Cummins ISB CM850 (2003-06) Fault Code: 585 PID: SID 39 SPN: 677 FMI: 4 Starter Relay Circuit – Voltage Below Normal or Shorted to Low Source. Low 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.
Cummins ISB CM850 (2003-06) Fault Code: 559 (ISC) PID: 94 SPN: 94 FMI: 0 Injector Metering Rail 1 Pressure – Data Valid but Below Normal Operational Range – Moderately Severe Level. The ECM has detected that fuel pressure is lower than commanded pressure.
Cummins ISB CM850 (2003-06) Fault Code: 559 (ISB) PID: 157 SPN: 157 FMI: 1 Fuel Pump Delivery Pressure Low – Data Valid but Below Normal Operational Range – Moderately Severe Level. The ECM has detected that fuel pressure is lower than commanded pressure
