Cummins ISM CM870 (2003-06) Fault Code: 341 PID: S253 SPN: 630 FMI: 2/2 Engine control module (ECM) data lost.

The ECM is connected to the battery by the ECM power harness. This direct link provides a constant power supply for the ECM. The location of the battery will vary with the OEM.

Possible repairs:

1)Charge or replace the battery.
2)Repair or replace the OEM harness.
3)Install the fuses correctly.

Cummins ISM CM870 (2003-06) Fault Code: 339 PID: S087 SPN: 1267 FMI: 4/4 Idle Shutdown Vehicle Accessories Relay Driver Circuit - Voltage Below Normal, or Shorted to Low Source. Low voltage detected at the idle shutdown vehicle accessory or ignition bus relay circuit when commanded ON.

Cummins ISM CM870 (2003-06) Fault Code: 338 PID: S087 SPN: 1267 FMI: 3/3 Idle Shutdown Vehicle Accessories Relay Driver Circuit - Voltage Above Normal, or Shorted to High Source. Open circuit or short to voltage source detected at the idle shutdown vehicle accessory/ignition bus relay circuit.

Cummins ISM CM870 (2003-06) Fault Code: 319 PID: P251 SPN: 251 FMI: 2/2 Real-Time Clock Power Interrupt - Data Erratic, Intermittent, or Incorrect. Real-time clock lost power.

Cummins ISM CM870 (2003-06) Fault Code: 295 PID: P108 SPN: 108 FMI: 2/2 Barometric Pressure - Data Erratic, Intermittent, or Incorrect. An error in the barometric pressure sensor signal was detected by the ECM.

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