This fault code 3426 DTCs document is a troubleshooting procedure for the aftertreatment diesel exhaust fluid line heater 4 circuit. It explains the fault condition, likely causes, diagnostic steps, connector inspections, resistance checks, ECM calibration review, and fault clearing method for CM2250 applications.
Official fault code 3426 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also references ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250 in the procedure tables |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; aftertreatment diesel exhaust fluid line heater 4 circuit |
| Publication no. | Not shown in the file extract; associated bulletin numbers include 4022254, 4022257, 4022250, and 2883445 |
| Year/Revision | Last Modified: 11-Jun-2010 |
| Pages | 10 |
| 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 aftertreatment diesel exhaust fluid line heater 4 and circuit.
- Guided Step 3 – Check the aftertreatment diesel exhaust fluid controller and harness.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
This file applies to Cummins CM2250 engine troubleshooting where Fault Code 3426 is present. The extract names ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, and ISX15 CM2250 in the associated procedure table for the aftertreatment diesel exhaust fluid controller, dosing unit, and ECM calibration code checks. Use it for vehicles equipped with the related aftertreatment diesel exhaust fluid dosing unit and controller circuit, not as a general wiring manual for unrelated DEF systems. For official manufacturer information, visit Cummins official website.
Who needs this fault code 3426 DTCs manual
This manual is useful for diesel technicians, fleet maintenance teams, and workshop owners diagnosing an amber CHECK ENGINE lamp or MIL caused by high signal voltage on diesel exhaust fluid line heater 4. It supports structured checks with INSITE™ electronic service tool, connector inspection, heater resistance testing, harness short testing, dosing unit replacement decisions, controller replacement decisions, and ECM calibration verification.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
