This Cummins engine brake document is a diagnostic troubleshooting PDF for Fault Code 2367. It explains the engine brake actuator driver output 2 circuit, the voltage-above-normal condition, and the checks used to isolate wiring, solenoid, connector, ECM, and calibration causes.
Official Cummins engine brake document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250 (2010-12) / DTCs; extract also references ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, ISC8.3 and ISL9 CM2250, and QSB6.7 CM2250. |
| System/Group | Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source |
| Publication no. | Not shown; associated bulletin numbers include 4022250, 2883445, 4022256, 4022255, and 4022257. |
| Year/Revision | Last modified dates shown: 20-Oct-2009, 11-Jun-2010, 28-Dec-2010, and 20-Jul-2010. |
| Pages | 28 |
| File size | 0.5 MB |
| Format | |
| Language | English |
Document table of contents
- FAULT CODE 145-fc2367
- Fault Code Path Selection
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 2367 (Heavy Duty)
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the fault codes.
- Guided Step 2 – Check the engine brake solenoid and circuit.
- Guided Step 3B – Check the engine brake solenoid number 2 diagnostic supply voltage.
- Guided Step 3C – Check for an open circuit in the engine harness.
Applicable truck models
The extract identifies CM2250 engine platforms rather than truck chassis. Coverage shown includes ISB6.7 CM2250 in the file information and procedures referencing ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, ISC8.3 and ISL9 CM2250, and QSB6.7 CM2250. The procedure applies to Fault Code 2367 where the ECM controls engine brakes on cylinders 4, 5, and 6 through engine brake solenoid number 2. For current manufacturer information, see Cummins official website.
Who needs this Cummins engine brake manual
This file is useful for diesel mechanics, fleet technicians, and workshop owners diagnosing amber CHECK ENGINE lamp complaints tied to SPN 1073 FMI 3/3. It supports a structured workflow using INSITE™ electronic service tool, resistance checks, voltage checks, connector inspection, ECM calibration review, and fault clearing validation.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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