Cummins ISB4.5 CM2150 Fault Code: 2182 PID: 478 SPN: 1072 FMI: 3 Engine Brake Actuator Driver 1 Circuit – Voltage Above Normal or Shorted to High Source.
Circuit Description
This circuit can be used to control either an exhaust brake or an engine brake depending on the application. The engine control module (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 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.
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 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 1 circuit pulse width modulated signal is detected to be greater than 0 volts when the pulse width modulated signal is turned off by the ECM.
Action Taken When the Fault Code is Active
-The ECM illumines the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
-The engine brake 1 circuit will be disabled.
Conditions for Clearing the Fault Code
-To validate the repair, start the engine and let it idle for 1 minute.
-The ECM will turn off the amber CHECK ENGINE light and the fault code will go inactive immediately after the diagnostic runs and passes.
-This fault code can also be cleared with INSITE™ electronic service tool.
Shop Talk
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.
Possible Causes
-Open circuit in the engine harness, brake harness, or engine brake solenoids
-Short to voltage source in the engine harness
-Malfunctioning ECM.
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