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Engine Brake Actuator Driver 1 Circuit – Voltage Below Normal, or Shorted to Low Source
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 2183 PID: S079 SPN: 1072 FMI: 4/4 LAMP: Amber SRT: |
Engine Brake Actuator Driver 1 Circuit – Voltage Below Normal, or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 1 signal circuit. |
Engine brake on cylinders 1, 2, and 3 can not be activated. |
 ISM – Engine Brake Solenoid Number 1 Signal Circuit
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Circuit Description
The electronic control module (ECM) controls the engine brakes on cylinders 1, 2, and 3 by sending a signal on engine brake solenoid number 1 signal circuit. The ECM will only command the brakes on under certain operating conditions.
Component Location
The engine brake solenoids are located under the rocker lever cover. The engine brake solenoids are controlled through the engine harness from the ECM. The engine harness passes through the rocker lever housing on the front of the engine and is connected to the engine brake solenoids through a 3-pin breakout connector located between cylinders 2 and 3.
Conditions for Running the Diagnostics
This diagnostic runs when the keyswitch is in the ON position and the engine is running.
Conditions for Setting the Fault Codes
The engine brake solenoid pulse width modulated (PWM) signal is not detected to be system voltage when the PWM signal is turned on.
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 solenoid 1 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, calibrate the ECM. Refer to Procedure 019-032 in Section 19.
Possible causes for this fault include:
- Short circuit to ground in the engine harness, connectors, or engine brake solenoids
- Malfunctioning ECM.
Refer to Troubleshooting Fault Code t05-2183
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