This Cummins ISB6.7 1961 troubleshooting document covers Fault Code 1961 for the EGR valve control circuit calculated over temperature condition. It explains the circuit description, fault logic, engine response, clearing conditions, INSITE checks, ECM calibration review, and ECM replacement decision path.
Official Cummins ISB6.7 1961 troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also references ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, QSL9 CM2250, and QSB6.7 CM2250 in associated procedures |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; EGR Valve Control Circuit |
| Publication no. | Not stated; associated bulletin numbers include 4022254, 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Last Modified: 11-Jun-2010 and 20-Jul-2010 |
| Pages | 8 |
| 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 the ECM.
- Guided Step 1A – Check the ECM.
- Guided Step 1B – Check the inactive counts of Fault Code 1961.
- Guided Step 2 – Check ECM calibration and clear fault codes.
- Guided Step 2A – Check if an ECM calibration update is available.
- Guided Step 2B – Disable the fault code.
Applicable truck models
This file applies to Cummins CM2250 engine diagnostics for ISB6.7 CM2250 and includes associated procedure coverage for ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The fault is SPN 2791, FMI 0/15, with an amber lamp, and it relates to high EGR valve driver temperature detected inside the ECM. The EGR valve motor uses motor A, B, and C control wires, and the position sensors report valve position to the ECM over position A, B, and C wires. Official manufacturer information is available from Cummins.
Who needs this Cummins ISB6.7 1961 troubleshooting manual
Mechanics, fleet technicians, and workshop owners need this EGR fault code troubleshooting manual when diagnosing Fault Code 1961, especially when the code becomes inactive after the vehicle cools down. It is useful for deciding whether to perform no repair, check inactive counts, update ECM calibration, clear the code with INSITE™ electronic service tool, or call for authorization to replace the ECM.
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