SPN 1073 - FMI 4 (Fault Code 2363)

SPN1073 FMI4

Engine Brake Actuator Driver Output 2 Circuit - Voltage Below Normal or Shorted to Low Source

ISL with CM2150 - Engine Brake Actuator Circuit

CODES:

Fault Code: 2363

PID(P), SID(S): S029

SPN: 1073

FMI: 4

Lamp: Amber

REASON: Engine Brake Actuator Driver Output 2 Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.

EFFECT: Engine brake on cylinders 4, 5, and 6 can not be activated.

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 passthrough connector at the back of the engine. There is a jumper harness from this connector to the engine brake passthrough 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 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.

Possible causes of this fault code include short circuit to ground in the engine harness, connectors, or engine brake solenoids.

Read More:

SPN 2791 - FMI 7 (Fault Code 2357)

SPN 411 - FMI 16 (Fault Code 2359)

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