This Cummins ISB6.7 EGR fault document explains Fault Code 2349 for an EGR valve control circuit current below normal or open circuit. It describes the EGR valve motor circuit, ECM monitoring, fault effects, connector inspections, resistance checks, ECM calibration review, and fault clearing with INSITE™.
Official Cummins ISB6.7 EGR fault document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also references ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250 in associated procedures |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs |
| Publication no. | 4022254 for ISB6.7 CM2250 associated procedures |
| Year/Revision | Last Modified: 20-Jul-2010; summary 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 the fault codes.
- Guided Step 2 – Check the EGR valve motor 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 is listed for Cummins ISB6.7 CM2250 DTC diagnostics and identifies Fault Code 2349, PID S146, SPN 2791, FMI 5. The associated procedures table also names ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250 for EGR Valve Procedure 011-022, Electronic Control Module Procedure 019-031, and Engine Wiring Harness Procedure 019-043. The extract states that EGR valve location varies depending on the engine, so the file should be used with the correct circuit diagram or wiring diagram for the engine being tested. See the manufacturer at Cummins official website.
Who needs this Cummins ISB6.7 EGR fault manual
Workshop technicians, diesel mechanics, and fleet repair managers need this Cummins ISB6.7 EGR fault manual when diagnosing an active amber CHECK ENGINE lamp or MIL related to the EGR valve control circuit. It is useful when confirming whether the cause is an EGR motor circuit open circuit, an open circuit in the wiring harness, damaged connector pins, or a malfunctioning ECM.
The procedure instructs users to turn the keyswitch ON, connect INSITE™ electronic service tool, read active fault codes, inspect the EGR valve motor connector, and measure resistance between EGR motor SUPPLY A, SUPPLY B, and SUPPLY C pins. Later steps cover ECM connector inspection, engine harness continuity checks with a less than 10 ohms specification, ECM replacement authorization if the fault remains active, and calibration revision review under System ID and Dataplate in Features and Parameters. The diagnostic notes that EGR valve actuation is disabled, active and stationary DPF regeneration is disabled, the EGR valve closes, and engine torque can be reduced if operation continues with the fault active.
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