Cumminz

Cummins ISB CM850 (2003-06) Fault Code: 488 PID: 105 SPN: 105 FMI: 0 Intake Manifold 1 Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level. Intake manifold air temperature signal indicates intake manifold air temperature above engine protection warning limit. The intake manifold air temperature sensor measures the temperature of the charge-air as it passes through the intake manifold. Possible causes: 1)Plugged charge air cooler fins2)Restricted airflow through the charge air cooler3)Undersized charge air cooler4)High turbocharger compressor outlet temperature. Possible repairs: 1)Replace the intake manifold air temperature sensor.

Cummins ISB CM850 (2003-06) Fault Code: 497 PID: SID 114 SPN: 1137 FMI: 2 Multiple Unit Synchronization Switch – Data Erratic, Intermittent, or Incorrect. Multi-Unit synchronous ON/OFF switch and Multi-Unit synchronous complimentary ON/OFF switch have different values in the ECM. The multi-unit synchronization feature allows two or more engines to be controlled by a single throttle signal and run at a similar speed. There is three engine configurations available with this feature: soft-coupled, hard-coupled, and soft-coupled marine. The soft-coupled configuration has all secondary engines in parallel with each other. The primary engine outputs a throttle signal to all secondary engines....

Cummins ISB CM850 (2003-06) Fault Code: 498 PID: 98 SPN: 98 FMI: 3 Engine Oil Level Sensor Circuit – Voltage Above Normal or Shorted to High Source. The engine oil level sensor has detected an internal failure. Possible causes: 1)Open or short circuit internally to the oil level sensor2)A malfunctioning oil level sensor. Possible repairs: 1)Replace the oil level sensor.2)The removal and installation of the connector may correct the fault.

Cummins ISB CM850 (2003-06) Fault Code: 499 PID: 98 SPN: 98 FMI: 4 Engine Oil Level Sensor Circuit – Voltage Below Normal or Shorted to Low Source. The engine oil level sensor has detected an internal failure. Possible causes: 1)Open or short circuit internally to the oil level sensor2)A failed oil level sensor3)An open circuit in the oil level sensor circuit. Possible repairs: 1)Replace the oil level sensor.2)Replace the engine harness.3)Replace the ECM.4)The removal and installation of the connector may correct the fault.

Cummins ISB CM850 (2003-06) Fault Code: 523 PID: 89 SPN: 611 FMI: 2 Auxiliary Intermediate (PTO) Speed Switch Validation – Data Erratic, Intermittent, or Incorrect. The position of the intermediate speed control switch 1 does not match the position of the intermediate speed control validation switch. When activated by switch or hand throttle, the Intermediate Speed Control feature governs engine speed to the corresponding preset speed. The three preset speeds can be adjusted with an increment or decrement switch but can not exceed the low or high idle governor engine speed limits. If Intermediate Speed Control validation is being use,...