Cummins ISX CM870 (2003-06) Fault Code: 2368 PID: S82 SPN: 1112 FMI: 3/3 Engine Brake Actuator Circuit Number 3 – shorted high. Open circuit or high voltage detected at the engine brake solenoid Number 3 signal circuit.

Possible causes:

1)Open circuit in the engine harness, brake harness, or engine brake solenoids
2)Short to voltage source in the engine harness
3)Damaged ECM
4)Loose connection at the engine brake solenoid.

Possible repairs:

1)Replace the engine brake harness.
2)Replace the engine brake solenoid.
3)Replace the ECM.
4)Repair or replace the engine harness.