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Engine Brake Solenoid Number 3 Signal Circuit
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 2368 PID: S82 SPN: 1112 FMI: 3/3 LAMP: Amber SRT: |
Engine Brake Actuator Circuit Number 3 – shorted high. Open circuit or high voltage detected at the engine brake solenoid Number 3 signal circuit. |
Engine brake on cylinders Number 4, 5, and 6 may be on all the time, or can not be activated. |
 Engine Brake Solenoid Number 3 Signal Circuit
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Circuit Description
The ECM controls the engine brakes on cylinders Number 4, 5, and 6 by sending a signal on engine brake solenoid Number 3 signal circuit. The ECM will only command the brakes on under certain operating conditions.
The engine brake fault code will only become active once the engine brakes are activated and will remain active until the ECM is powered down. Once the ECM is powered down, the fault code will be inactive until the engine brakes are activated again, if the circuit interruption is still present. This tree is designed to troubleshoot an inactive fault code.
Component Location
The engine brake solenoids are located under the valve cover. The engine brake connector is located on the intake side of the cylinder head above and forward of the air inlet horn.
Shop Talk
Possible causes of this fault include:
- Open circuit in the engine harness, brake harness, or engine brake solenoids
- Short to voltage source in the engine harness
- Damaged ECM
- Loose connection at the engine brake solenoid.
Refer to Troubleshooting Fault Code t05-2368
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