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Cummins ISB CM850 (2003-06) Fault Code: 324 PID: SID 3 SPN: 653 FMI: 5 Injector Solenoid Driver Cylinder 3 Circuit – Current Below Normal or Open Circuit. High resistance or no current detected at number 3 injector or RETURN pin. 1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the faulty cylinders(s).2)Fault deactivation: The ECM will attempt to enable any disabled injector circuit...

Cummins ISB CM850 (2003-06) Fault Code: 325 PID: SID 6 SPN: 656 FMI: 5 Injector Solenoid Driver Cylinder 6 Circuit – Current Below Normal or Open Circuit. High resistance or no current detected at number 6 injector driver or RETURN pin. 1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the faulty cylinders(s).2)Fault deactivation: The ECM will attempt to enable any disabled injector...

Cummins ISB CM850 (2003-06) Fault Code: 331 PID: SID 2 SPN: 652 FMI: 5 Injector Solenoid Driver Cylinder 2 Circuit – Current Below Normal or Open Circuit. High resistance or no current detected at number 2 injector driver or RETURN pin. 1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the faulty cylinders(s).2)Fault deactivation: The ECM will attempt to enable any disabled injector...

Cummins ISB CM850 (2003-06) Fault Code: 332 PID: SID 4 SPN: 654 FMI: 5 Injector Solenoid Driver Cylinder 4 Circuit – Current Below Normal or Open Circuit. High resistance or no current detected at number 4 injector driver or RETURN pin. 1)Fault activation: The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the faulty cylinders(s).2)Fault deactivation: The ECM will attempt to enable any disabled injector...

Cummins ISB CM850 (2003-06) Fault Code: 334 PID: 110 SPN: 110 FMI: 2 Engine Coolant Temperature – Data Erratic, Intermittent, or Incorrect. The engine coolant temperature reading is not changed with engine operating conditions. Two different failure modes of the engine coolant temperature sensor can trigger this fault code. The engine must be turned off for period of 8 hours before this diagnostic will run. When the keyswitch is turned ON after an 8 hour cold soak, engine coolant temperature is compared to intake manifold temperature. If coolant temperature is found to be higher than intake manifold temperature by a...