The Cummins fault code 3322 troubleshooting manual is the official Cummins procedure for diagnosing Aftertreatment Diesel Particulate Filter Outlet Temperature – Data Erratic, Intermittent, or Incorrect (SPN 3246, FMI 2). The aftertreatment diesel particulate filter outlet temperature sensor reports gas temperature leaving the DPF. This code sets when the aftertreatment diesel particulate filter outlet temperature is not changing with engine operating conditions. The amber warning lamp behaviour and the exact conditions that set and clear the code are documented step by step.
Cummins fault code 3322 document details
| Brand | Cummins |
|---|---|
| Model coverage | Cummins ISX11.9, ISB6.7, ISC8.3, ISL9 and ISX15 CM2250 (2010-12) engines |
| System / Group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault code | 3322 — SPN 3246, FMI 2 |
| Warning lamp | Amber |
| Year / Revision | 2010-12 (CM2250) |
| Pages | 16 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview and Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Associated Procedures and Troubleshooting Steps
- Guided circuit-response and connector checks
- Conditions for Clearing the Fault Codes
Applicable truck models covered
This document applies to Cummins ISX11.9, ISB6.7, ISC8.3, ISL9 and ISX15 CM2250 (2010-12) engines. Active aftertreatment diesel particulate filter regeneration will be disabled. The guided steps rely on the Cummins INSITE electronic service tool to read active codes, monitor sensor data and confirm the repair. Always confirm engine and calibration coverage against the official Cummins engine support site before ordering parts.
Who needs this Cummins fault code 3322 manual
Diesel technicians and workshop owners servicing CM2250 platform engines use this file to work SPN 3246 / FMI 2 in the correct order instead of guessing at parts. It lists every conditions block, associated procedure and guided circuit-response check, with the connector and harness inspection points and the specifications each step expects. Following the tree in sequence keeps the repair accountable and lets the technician confirm the fault is cleared once and verified with the Cummins INSITE electronic service tool.
The full PDF, including the complete guided troubleshooting tree and specifications, is available in the DiagTechPro manuals library; a free account is required to download it.
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