Cummins fault code 2368 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags a Engine Brake Actuator Driver Output 3 Circuit – Voltage Above Normal, Or Shorted To High Source condition (PID S082, SPN 1112, FMI 3/3, Amber lamp). This 6-page PDF reproduces the manufacturer description, shop talk, component location and step-by-step troubleshooting so technicians can confirm and clear the code.
Cummins fault code 2368 overview
Cummins defines this code as “ENGINE BRAKE ACTUATOR DRIVER OUTPUT 3 CIRCUIT – VOLTAGE ABOVE NORMAL, OR SHORTED TO HIGH SOURCE” on the Engine Brake Solenoid Number 3 Signal Circuit. The electronic control module (ECM) controls the engine brakes on cylinders Number 4, 5, and 6 by sending a signal on engine brake solenoid Number 3 signal circuit. The ECM will only command the brakes on under certain operating conditions. 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.
The document’s shop talk section highlights the following:
- An open circuit in the engine harness, brake harness, or engine brake.
- A short to voltage source in the engine harness.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | Engine Brake Solenoid Number 3 Signal Circuit — ISM CM871 fault codes |
| Fault code | 2368 (SPN 1112, FMI 3/3) |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 6 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Fault code identification (PID, SPN, FMI, lamp)
- Description
- Shop Talk
- Component Location
- Troubleshooting Steps
Applicable truck models and engines
This document applies to Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) equipped diesel engines that log Fault Code 2368 on the Engine Brake Solenoid Number 3 Signal Circuit. Always confirm engine calibration and use a Cummins diagnostic tool such as INSITE to read live data before starting repairs. Full engine specifications and service information are published on the Cummins official website.
Who needs this Cummins fault code 2368 manual
Heavy-duty truck technicians, fleet workshops and owner-operators diagnosing an electronic control module warning on ISM CM871 engines will use this sheet to verify SPN 1112 before parts are replaced.
The full PDF is available in the DiagTechPro manuals library; a free account is required to download.
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