Cummins ISX15 CM2250 (2010-12) Fault Code: 6595 PID: SPN: 190 FMI: 11 Engine Speed- Root Cause Not Known

Circuit DescriptionThe crankshaft position and camshaft position sensors are Hall effect type sensors. The engine control module (ECM) provides a 5 volt supply to the position sensor and a return circuit. As the teeth on the crankshaft speed ring or the dimples in the back of the camshaft gear move past the position sensor, a signal is generated on the position sensor signal circuit. The ECM interprets this signal and converts it to an engine speed. A missing tooth on the crankshaft gear is used by the ECM to determine the position of the engine.

Component LocationThe crankshaft position and camshaft position sensor location varies, depending on engine model.

Conditions for Running the DiagnosticsThis diagnostic runs continuously when the engine is running and during cranking.

Conditions for Setting the Fault CodesThe ECM detected a loss of both engine speed/position signals.

Action Taken When the Fault Code is ActiveFor On-Board Diagnostics (OBD) engines, the ECM illuminates the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.Exhaust gas recirculation (EGR) valve operation will be disabled.Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.The engine may not start.Conditions for Clearing the Fault CodeTo validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.For OBD engines, the ECM will extinguish the MIL after three consecutive trips where the diagnostic runs and passes.The ?Reset All Faults? command in INSITE? electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD engines.

Shop TalkThis fault code indicates the crankshaft position sensor and the camshaft position sensor have lost synchronization or the wiring harness connectors are reversed.

As a result, the engine will not start.

Possible Cause:1) Battery Failure2) ECM calibration

Cummins ISX15 CM2250 (2010-12) Fault Code: 6422 PID: SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit- Voltage Below Normal or Shorted to Low Source
Cummins ISX15 CM2250 (2010-12) Fault Code: 6421 PID: SID 254 SPN: 1073 FMI: 3 Engine Brake Actuator Driver Output 2 Circuit- Voltage Above Normal or Shorted to High Source
Cummins ISX15 CM2250 (2010-12) Fault Code: 6419 PID: SPN: 1072 FMI: 4 Engine Brake Actuator Driver 1 Circuit- Voltage Below Normal or Shorted to Low Source
Cummins ISX15 CM2250 (2010-12) Fault Code: 6418 PID: SPN: 1072 FMI: 3 Engine Brake Actuator Driver 1 Circuit- Voltage Above Normal or Shorted to High Source
Cummins ISX15 CM2250 (2010-12) Fault Code: 6417 PID: SPN: 974 FMI: 19 SAE J1939 Mulitplexing Remote Accelerator Pedal or Lever Sensor System- Received Network Data In Error
Cummins ISX15 CM2250 (2010-12) Fault Code: 6416 PID: SPN: 3703 FMI: 31 Aftertreatment Regeneration Inhibited Due To Inhibit Switch – Condition Exists
Back to blog