Cummins ISX15 CM2250 (2010-12) Fault Code: 2363 (MR) PID: SID 80 SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit- Voltage Below Normal or Shorted to Low Source
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 by 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 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 lamp immediately when the diagnostic runs and fails.
The engine brake solenoid 2 will be disabled.
Conditions for Clearing the Fault Code
To validate the repair, start the engine and let it idle for 1 minute.
The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
The ECM will turn off the amber CHECK ENGINE lamp after the diagnostic runs and passes.
The ?Reset All Faults? command in INSITE? electronic service tool can be used to clear active and inactive faults.
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 of this fault code include:
A short circuit to ground in the engine harness, connectors, or engine brake solenoids
A malfunctioning ECM.
Possible Cause:
1) Engine Harness
2) Engine Brake Solenoid failure
3) ECM failure
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