Cummins ISM CM870 (2003-06) Fault Code: 352 PID: S232 SPN: 1079 FMI: 4/4 Sensor Supply 1 Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected at sensor supply number 1 circuit.

Low voltage on the +5 volt supply wire can be caused by a short circuit to ground in a supply wire, a short circuit between a supply wire and a return wire, a malfunctioning sensor, or a malfunctioning ECM power supply.

Possible repair:

1)Replace the barometric pressure sensor.
2)Replace the engine oil pressure sensor.
3)Replace the digital vehicle speed sensor.
4)Replace the remote accelerator position sensor.
5)Repair or replace the engine harness.
6)Replace the ECM.
7)Replace the OEM harness.

Cummins ISM CM870 (2003-06) Fault Code: 343 PID: S254 SPN: 629 FMI: 12/12 Electronic Control Module Warning Internal Hardware Failure - Bad Intelligent Device or Component. ECM power supply errors have been detected.

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

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.

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