This Cummins Code 3318 document is a troubleshooting manual for an aftertreatment diesel particulate filter intake temperature fault. It explains the fault reason, ECM response, sensor circuit checks, interface module tests, OEM harness checks, calibration review, and fault clearing using INSITE™ electronic service tool.
Official Cummins Code 3318 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, QSB6.7 CM2250 |
| System/Group | Aftertreatment Diesel Particulate Filter Intake Temperature Sensor Circuit / DTCs |
| Publication no. | Not specified in the extract; associated bulletin numbers include 4022254, 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Year unknown; last modified dates shown include 28-Jan-2011 and 07-Dec-2010 |
| Pages | 17 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- FAULT CODE 3318 – Aftertreatment Diesel Particulate Filter Intake Temperature – Data Erratic, Intermittent, or Incorrect
- 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 1A – Check for fault codes.
- Guided Step 2 – Check the aftertreatment diesel particulate filter intake temperature sensor and circuit.
- Guided Step 3 – Check the aftertreatment DPF temperature sensor interface module.
- Guided Step 4 – Check the ECM and OEM harness.
- Guided Step 5 – Check ECM calibration and clear fault codes.
Applicable truck models
The extract lists CM2250 engine platforms rather than truck makes or chassis models. Coverage includes ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250 applications using the aftertreatment diesel particulate filter intake temperature sensor circuit. The sensor location is described as the aftertreatment system, at the outlet of the diesel oxidation catalyst and before the diesel particulate filter; the extract directs users to the OEM service manual for exact component location. Manufacturer information is available from Cummins official website.
Who needs this Cummins Code 3318 manual
This file is useful for diesel technicians, fleet maintenance teams, and workshop owners diagnosing SPN 3242 FMI 2 with an amber CHECK ENGINE lamp or MIL. It supports checks for a stuck in-range sensor, high resistance in signal or return lines, a malfunctioning aftertreatment DPF temperature sensor interface module, connector pin damage, OEM harness shorts, and ECM calibration status.
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