1)Loose, missing, or corroded grounds2)Damaged tone wheel teeth3)Loose crankshaft tone wheel4)Static timing misset5)Front gear train slippage6)Misoriented engine speed or camshaft position sensor7)Electrical noise.
1)Replace the speed or position sensor.2)Replace the crankshaft or injector camshaft, whichever has malfunctioned.
Cummins ISX CM870 (2003-06) Fault Code: 692 PID: S151 SPN: 1172 FMI: 4/4 Turbocharger 1 Compressor Intake Temperature Circuit – Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at turbocharger compressor intake air temperature circuit.
Cummins ISX CM870 (2003-06) Fault Code: 691 PID: S151 SPN: 1172 FMI: 3/3 Turbocharger Number 1 Compressor Inlet Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the turbocharger compressor inlet air temperature circuit.
Cummins ISX CM870 (2003-06) Fault Code: 689 PID: P190 SPN: 190 FMI: 2/2 Engine Crankshaft Speed/Position – Data Erratic, Intermittent, or Incorrect. The ECM has detected an error in the engine speed signal.
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).
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.