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Cummins ISX CM870 (2003-06) Fault Code: 687 PID: P103 SPN: 103 FMI: 1/18 Turbocharger 1 Speed – Data Valid But Below Normal Operating Range – Moderately Severe Level. Low turbocharger speed detected by the engine control module (ECM).

This fault may come active if the electronic control module (ECM) senses boost pressure and engine speed while at the same time a turbocharger speed signal is not present.

Possible causes:

1)Turbocharger speed sensor2)Turbocharger speed sensor o-ring3)Engine harness4)Barometric pressure sensor5)Intake manifold pressure sensor6)Replace the ECM.This fault becomes inactive any time the speed signal from the turbocharger speed sensor returns.

If the calibration software phase is less than 5.0.0.0 and this fault code is active at key-on with the engine not running, the intake manifold pressure signal or barometric pressure sensor signal is inaccurate. Use INSITE? electronic service tool, Data Logger/Monitor to view the calibration software phase.

Make sure only one turbocharger speed sensor o-ring is present. If the old turbocharger speed sensor o-ring remained when the new turbocharger speed sensor and turbocharger speed sensor o-ring were installed, this will create excessive clearance and the turbocharger sensor will not read the turbocharger speed, causing the fault.

Possible repairs:

1)Replace the turbocharger speed sensor.2)Repair or replace the engine harness.3)Replace the ECM.

Cummins ISX CM870 (2003-06) Fault Code: 649 PID: S153 SPN: 1378 FMI: 11/31 Change Lubricating Oil and Filter. Maintenance Monitor feature indicates the engine is due for a lubricating oil and filter change.
Cummins ISX 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.
Cummins ISX 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 ISX 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 ISX 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 ISX 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.