Cummins ISM CM870 (2003-06) Fault Code: 598 PID: P167 SPN: 167 FMI: 1/1 Electrical Charging System Voltage - Data Valid But Below Normal Operating Range - Most Severe Level. Very low battery voltage detected by the battery voltage monitor feature.

Make sure the ECM battery supply (+) is coming directly from the battery and not the starter.

Possible cause:

1)Undercharged batteries caused by a malfunctioning alternator or regulator.

Possible repairs:

1)Charge or replace the battery.
2)Repair or replace the alternator and/or OEM wiring to the alternator.
3)Repair or replace the OEM harness.
4)Repair the battery power connector.

Cummins ISM CM870 (2003-06) Fault Code: 597 PID: P167 SPN: 167 FMI: 1/18 Electrical Charging System Voltage - Data Valid But Below Normal Operating Range - Moderately Severe Level. Low battery voltage detected by the battery voltage monitor feature.

Cummins ISM CM870 (2003-06) Fault Code: 596 PID: P167 SPN: 167 FMI: 0/16 Electrical Charging System Voltage - Data Valid But Above Normal Operating Range - Moderately Severe Level. High battery voltage detected by the battery voltage monitor feature.

Cummins ISM CM870 (2003-06) Fault Code: 595 PID: P103 SPN: 103 FMI: 0/16 Turbocharger 1 Speed - Data Valid But Above Normal Operating Range - Moderately Severe Level. High turbocharger speed has been detected by the engine control module (ECM).

Cummins ISM CM870 (2003-06) Fault Code: 585 PID: S39 SPN: 677 FMI: 4/4 Starter Relay Driver Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected at starter lockout circuit.

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