This fault code 3224 DTCs document is a troubleshooting PDF for the aftertreatment purge air actuator circuit. It explains a voltage above normal or shorted to high source condition, the amber lamp response, disabled active DPF regeneration, and the guided checks needed to validate the repair with INSITE™ electronic service tool.
Official fault code 3224 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISX11.9 CM2250, ISX15 CM2250, QSL9 CM2250, QSB6.7 CM2250; file group lists ISB6.7 CM2250 (2010-12) / DTCs |
| System/Group | Aftertreatment Purge Air Actuator Circuit; DTCs |
| Publication no. | Associated bulletin numbers shown: 4022250, 2883445, 4022256, 4022255 |
| Year/Revision | Last Modified: 11-Jun-2010 and 20-Jul-2010 |
| Pages | 11 |
| 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 purge air actuator 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 PDF applies to Cummins CM2250 engine platforms listed in the extract, including ISX11.9 CM2250, ISX15 CM2250, QSL9 CM2250, and QSB6.7 CM2250, with the shop file group also referencing ISB6.7 CM2250 (2010-12) DTC coverage. The procedures focus on the aftertreatment purge air actuator mounted on the left side of the engine above the aftertreatment fuel shutoff manifold, plus the ECM, engine wiring harness, connector pins, and ECM calibration code checks. See the manufacturer at Cummins official website.
Who needs this fault code 3224 DTCs manual
Workshop owners, diesel technicians, and fleet mechanics need this manual when an engine reports SPN 3490 FMI 3 with an amber lamp, disabled active regeneration, or suspected high-source voltage in the aftertreatment purge air actuator circuit. It supports connector inspection, actuator resistance testing at 7 to 10 ohms, engine harness short checks above 100k ohms, ECM authorization guidance, calibration review, and final fault clearing.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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