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Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 2367 PID: S80 SPN: 1073 FMI: 3/3 LAMP: Amber SRT: |
Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit. |
Engine brake on cylinders 4, 5, and 6 can not be activated. |
 ISB, ISC, and ISL with CM2150 – Engine Brake Actuator Circuit
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Circuit Description
The electronic control module (ECM) controls engine brakes on cylinders 4, 5, and 6 by sending a signal on the engine brake solenoid number 2 signal circuit. A 2-pin Weather Pack connector is located near the number 3 injector pass-through connector at the back of the engine. There is a jumper harness from this connector to the engine brake pass-through connectors on the rocker lever housing.
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.
Conditions for Running the Diagnostics
This diagnostic runs when the keyswitch is in the ON position and when the pulse width modulated (PWM) device is getting energized or de-energized. In some cases the diagnostics can also run at some fixed intervals.
Conditions for Setting the Fault Codes
The engine brake 2 circuit PWM signal is detected to be system voltage when the PWM signal is turned off.
Action Taken When the Fault Code is Active
- The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
- The engine brake 2 circuit will be disabled.
Conditions for Clearing the Fault Code
The ECM will turn off the amber CHECK ENGINE light and the fault code state will become inactive immediately after the diagnostic runs and passes. The fault code can also be cleared with INSITE™ electronic service tool.
Shop Talk
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. Refer to Procedure 019-032 (ECM Calibration Code) in Section 19 in the corresponding Troubleshooting and Repair Manual for the engine being serviced.
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
- Damaged ECM.
Refer to Troubleshooting Fault Code t05-2367
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