This Code 3557 document is a diagnostic PDF for Fault Code 3557 covering the aftertreatment diesel exhaust fluid controller circuit. It explains the code reason, effects, diagnostic conditions, guided troubleshooting steps, connector inspections, circuit response checks, harness resistance checks, ECM calibration review, and fault clearing with INSITE™.
Official Code 3557 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also lists ISC8.3 and ISL9 CM2250, ISX15 CM2250, and ISX11.9 CM2250 in associated procedures |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Aftertreatment Diesel Exhaust Fluid Controller Circuit |
| Publication no. | Associated bulletin numbers shown: 4022254, 4022257, 4022250, 2883445 |
| Year/Revision | Last Modified: 11-Jun-2010 |
| Pages | 12 |
| 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 diesel exhaust fluid pressure sensor and circuit.
- Guided Step 3 – Check the aftertreatment diesel exhaust fluid controller and harness.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
This file applies to Cummins ISB6.7 CM2250 engines in the listed DTC group and also references associated procedures for ISC8.3 and ISL9 CM2250, ISX15 CM2250, and ISX11.9 CM2250 engines. OEM vehicle coverage is not specified because the aftertreatment diesel exhaust fluid controller location varies by application and original equipment manufacturer; the document directs technicians to the OEM service manual for mounting location details. See the manufacturer at Cummins official website.
Who needs this Code 3557 manual
Workshop technicians, fleet mechanics, and diesel diagnostic specialists need this ISB6.7 fault code manual when Fault Code 3557 is active or intermittent and DEF dosing is disabled. It is useful for checking connector pins, dosing unit response, the 86-pin DEF controller connector, pin-to-pin shorts, resistance greater than 100k ohms, ECM calibration revision, and final clearing conditions.
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