Cummins fault code 2363 is documented on this DiagTechPro library page for Cummins ISM CM871 (2007-09) engines, where it flags a (ISM) Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal, Or Shorted To Low Source condition (PID S080, SPN 1073, FMI 4/4, Amber lamp). This 8-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 2363 overview
Cummins defines this code as “(ISM) ENGINE BRAKE ACTUATOR DRIVER OUTPUT 2 CIRCUIT – VOLTAGE BELOW NORMAL, OR SHORTED TO LOW SOURCE” on the Engine Brake Solenoid Number 2 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 signal number 2 circuit. The ECM will only command the brakes on under certain operating conditions.
The document’s shop talk section highlights the following:
- A short circuit to ground in the engine harness, connectors, or.
- A malfunctioning ECM.
Official document details
| Brand | Cummins |
| Model coverage | Cummins ISM CM871 (2007-09); Cummins ISX CM871 (2007-09) |
| System / Group | Engine Brake Solenoid Number 2 Signal Circuit — ISM CM871 fault codes |
| Fault code | 2363 (SPN 1073, FMI 4/4) |
| Source | TruckFaultCodes.com Cummins fault code reference (© 2017) |
| Pages | 8 |
| File size | 0.4 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 2363 on the Engine Brake Solenoid Number 2 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 2363 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 1073 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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