1)An open circuit in the engine harness, brake harness, or engine brake solenoids.2)A short to voltage source in the engine harness.3)A malfunctioning ECM.
1)Replace the engine brake solenoid.2)Replace the engine brake harness3)Replace the ECM.
Cummins ISX CM870 (2003-06) Fault Code: 2366 (V2) PID: S28 SPN: 1072 FMI: 3/3 Engine Brake Actuator Circuit Number 1 – shorted high. Open circuit or high voltage detected at the engine brake solenoid number 1 signal circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2366 (V1) PID: S28 SPN: 1072 FMI: 3/3 Engine Brake Actuator Circuit Number 1 – shorted high. Open circuit or high voltage detected at the engine brake solenoid number 1 signal circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2365 PID: S82 SPN: 1112 FMI: 4/4 Engine Brake Actuator Circuit Number 3 – shorted low. Low voltage detected at the engine brake solenoid Number 3 signal circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2363 PID: S29 SPN: 1073 FMI: 4/4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2362 PID: S28 SPN: 1072 FMI: 4/4 Engine Brake Actuator Circuit Number 1 – shorted low. Low voltage detected at the engine brake solenoid Number 1 signal circuit.
Cummins ISX CM870 (2003-06) Fault Code: 2359 PID: P411 SPN: 411 FMI: 0/16 EGR Differential Pressure Sensor – Data Valid but Above Normal Operating Range – Moderately Severe Level. EGR differential pressure sensor failed automatic calibration procedure or EGR differential pressure reading not valid for engine operating conditions.