This Cummins 1867 troubleshooting manual is a fault-code diagnostic document for Cummins CM2250 engines with EGR temperature sensor data erratic, intermittent, or incorrect. It explains Fault Code 1867, SPN 412, FMI 2/2, related INSITE™ checks, connector inspections, ECM harness testing, calibration review, and fault clearing steps.
Official Cummins 1867 troubleshooting manual document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also references ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, and ISX11.9 CM2250 in associated procedures |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Exhaust Gas Recirculation Temperature |
| Publication no. | Not shown for this file; associated bulletin numbers include 4022254, 4022257, 4022250, and 2883445 |
| Year/Revision | Last Modified: 21-Jan-2011; overview section Last Modified: 11-Jun-2010 |
| Pages | 12 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- 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 for sensor circuit fault codes
- Guided Step 2 – Check the exhaust gas recirculation temperature sensor and circuit
- Guided Step 3 – Check the ECM and engine harness
- Guided Step 4 – Check ECM calibration and clear fault codes
Applicable truck models
This file applies to Cummins CM2250 engine diagnostics where Fault Code 1867 is used for exhaust gas recirculation temperature data that is erratic, intermittent, or incorrect. The file information identifies ISB6.7 CM2250 (2010-12), while the associated procedures also list ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, and GX CM2250 engine models. The diagnostic describes an EGR temperature sensor located on the EGR connection tube between the EGR cooler and the air intake connection. It also states that the ECM supplies 5 volts to the EGR temperature signal circuit and uses the sensor value for engine protection and emissions control. For official manufacturer information, visit Cummins.
Who needs this Cummins 1867 troubleshooting manual manual
Workshop owners, diesel mechanics, and diagnostic technicians need this document when Fault Code 1867 is active or when INSITE™ reports related circuit faults such as Fault Code 2375 or 2376. The repair flow is useful for checking EGR temperature sensor connectors, harness pins, circuit response, ECM connectors, ECM calibration code, and final fault-code clearing conditions.
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