This Cummins fault 3736 document is a troubleshooting manual for the aftertreatment diesel exhaust fluid controller fault code. It explains the circuit description, conditions for setting and clearing the code, possible causes, and guided diagnostic steps using INSITE™ electronic service tool.
Official Cummins fault 3736 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Aftertreatment Diesel Exhaust Fluid Controller |
| Publication no. | Bulletin 4022254, 4022257, 4022250, 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
- FAULT CODE 3736 – Aftertreatment Diesel Exhaust Fluid Controller – Root Cause Not Known
- 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 controller.
- 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: ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, and ISX11.9 CM2250. The component location varies by application and OEM, with the controller typically mounted to the vehicle frame or a suitable rigid bracket, so the document directs users to the OEM service manual for exact vehicle placement. For manufacturer information, visit the Cummins official website.
Who needs this Cummins fault 3736 manual
Workshop owners, diesel technicians, and fleet mechanics need this guide when diagnosing an amber CHECK ENGINE light with SPN 3360 FMI 11, unexpected J1939 data link communication, and disabled diesel exhaust fluid injection. The steps focus on fault code checks, the DEF controller 53-pin connector, ECM connector inspection, calibration revision checks, and clearing the fault after repair.
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