Cummins ISB CM850 (2003-06) Fault Code: 689 PID: 190 SPN: 190 FMI: 2 Engine Crankshaft Speed/Position – Data Erratic, Intermittent, or Incorrect. Loss of signal from crankshaft sensor.
This fault code is recorded when the electronic control module (ECM) does not receive a signal from the crankshaft engine speed sensor, or the signal it receives is degraded.
1)Open circuit on the supply, signal, or return circuits in the sensor, engine harness, or ECM
2)Short circuits to ground or return circuits in the sensor, engine harness, or ECM
3)Short circuits to a voltage source in the sensor, engine harness, or ECM
4)Damage to the sensor target teeth or tone wheel.
INSITE? electronic service tool monitor parameter associated with this fault code and sensor include:
1)Engine speed sensor state.
If this fault code occurs intermittently, look closely for causes of intermittent harness connections such as loose or worn pins in the engine harness connectors.
1)Replace the crankshaft engine speed sensor.
2)Repair or replace the engine harness.
3)Replace the ECM.
Cummins ISB CM850 (2003-06) Fault Code: 688 PID: 98 SPN: 98 FMI: 0 Engine Oil Level ? Data Valid But Above Normal Operational Range ? Most Severe Level. High oil level has been detected by the oil level sensor.
Cummins ISB CM850 (2003-06) Fault Code: 687 (ISC) PID: 103 SPN: 103 FMI: 1 Turbocharger Number 1 Speed Low – Data Valid but Below Normal Operational Range – Moderately Severe Level. Low turbocharger speed detected by the ECM.
Cummins ISB CM850 (2003-06) Fault Code: 687 (ISB) PID: 103 SPN: 103 FMI: 18 Turbocharger number 1 speed low – warning level. Low turbocharger speed detected by the ECM.
Cummins ISB CM850 (2003-06) Fault Code: 649 PID: SID 153 SPN: 1378 FMI: 11 Change Lubricating Oil and Filter – Condition Exists. Change engine oil and filter.
Cummins ISB CM850 (2003-06) Fault Code: 599 PID: SID 25 SPN: 640 FMI: 14 Auxiliary Commanded Dual Output Shutdown – Special Instructions. The engine protection limit has been exceeded for the dual outputs calibrated limits.
Cummins ISB CM850 (2003-06) Fault Code: 598 PID: 167 SPN: 167 FMI: 11 Electrical Charging System Voltage Low – Data Valid But Below Normal Operating Range – Most Severe Level. Very low battery voltage detected by the battery voltage monitor feature.
