CM850 Electronic Control System – FAULT CODE 2366

Engine Brake Actuator Circuit #1 – Voltage Above Normal or Shorted to High Source


Overview

CODE REASON EFFECT
Fault Code: 2366
PID: S028
SPN: 1072
FMI: 3
LAMP: Amber
SRT: 

Engine Brake Actuator Circuit #1 – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 1 signal circuit.

Engine brake on cylinders 1, 2, and 3 can not be activated or exhaust brake will not operate.

Engine Brake Circuit
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Circuit Description

This circuit can be used to control either an exhaust brake or an engine brake depending on the application. The ECM controls engine brakes on cylinders 1, 2, and 3 by sending a signal on the engine brake solenoid number 1 signal circuit. If an exhaust brake is installed, the exhaust brake is driven by the engine brake solenoid number 1 signal line. A 2-pin Weather Pack connector is located near the number 3 injector pass-through connector at the back of the engine. If an engine brake is installed, there will be a jumper harness from this connector to the engine brake pass-through connectors on the rocker lever housing. If an exhaust brake is installed, the OEM will connect one wire to the 2-pin Weather Pack connector for the exhaust brake relay.

Component Location

The engine brake solenoids are located under the valve cover. The engine brake solenoids are controlled through the engine harness from the ECM. The exhaust brake is an optional feature that is mounted in the exhaust system by the OEM.

Shop Talk

Possible causes of this fault code include:

  • Open circuit in the engine harness, brake harness, or engine brake solenoids
  • Short to voltage source in the engine harness
  • Failed ECM.

Refer to Troubleshooting Fault Code t05-2366

Last Modified:  08-Jul-2010