This Cummins 3236 fault code document is a troubleshooting PDF for aftertreatment SCR outlet temperature diagnostics on CM2250 engines. It explains the circuit description, fault conditions, effects, guided checks, related Cummins procedures, and final clearing steps using INSITE™ electronic service tool.
Official Cummins 3236 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; associated coverage also lists ISC8.3 and ISL9 CM2250, ISX15 CM2250, and ISX11.9 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; aftertreatment SCR outlet temperature sensors |
| Publication no. | 4022254 for ISB6.7 CM2250; associated tables also list 4022257, 4022250, and 2883445 |
| Year/Revision | Last Modified: 11-Jun-2010 |
| Pages | 13 |
| 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 aftertreatment system.
- Guided Step 2 – Check the diesel exhaust fluid (DEF) for contamination.
- Guided Step 3 – Check the fuel system.
- Guided Step 5 – Check the aftertreatment fuel injector.
- Guided Step 6 – Inspect the aftertreatment diesel oxidation catalyst.
- Guided Step 7 – Check ECM calibration and clear fault codes.
Applicable truck models
This file applies to Cummins CM2250 engine diagnostic coverage shown in the extract, especially ISB6.7 CM2250 with bulletin 4022254. The associated procedure table also references ISC8.3 and ISL9 CM2250, ISX15 CM2250, and ISX11.9 CM2250 for related injector, aftertreatment SCR catalyst, diesel oxidation catalyst, exhaust system diagnostics, aftertreatment testing, ECM calibration code, aftertreatment gas temperature sensor, and SCR catalyst temperature sensor interface module procedures. For manufacturer information, visit Cummins official website.
Who needs this Cummins 3236 fault code manual
This manual is useful for diesel mechanics, fleet technicians, and workshop owners diagnosing high SCR outlet temperature events where diesel exhaust fluid injection into the SCR aftertreatment system is disabled. It supports checks for related fault codes 3142 through 3149, temperature sensor comparison, DEF contamination, injector misfire, turbocharger outlet oil or fuel signs, aftertreatment fuel injector leakage, diesel oxidation catalyst soot accumulation, cracks in cell walls, and ECM calibration status.
The Cummins 3236 fault code summary identifies SPN 4363 FMI 15, an amber CHECK ENGINE lamp, and a condition where the ECM detects SCR catalyst outlet temperature above a calibratable value. The repair validation section says to start the engine and let it idle for 1 minute, then confirm the fault changes to inactive after the diagnostic runs and passes. Full PDF available in the DiagTechPro manuals library, free account required to download.
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