This 21-page PDF is a Fault Code 3597 DTCs troubleshooting guide covering the aftertreatment diesel exhaust fluid (DEF) controller abnormal update rate diagnostic on CM2250 engines. It provides circuit descriptions, fault conditions, step-by-step diagnostic procedures, and repair validation instructions for SPN 3360 / FMI 9.
Official Fault Code 3597 DTCs document details
| Brand | Cummins |
| Model coverage | ISB6.7 CM2250, ISC8.3 CM2250, ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250 |
| System / Group | Aftertreatment SCR / Diagnostic Trouble Codes (DTCs) |
| Publication no. | Bulletins 4022254, 4022257, 4022250, 2883445 (by engine model) |
| Year / Revision | Last modified 23-Nov-2010 / 31-Dec-2010 |
| Pages | 21 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview — Circuit Description and Component Location
- Fault Code 3597 — Aftertreatment Diesel Exhaust Fluid Controller – Abnormal Update Rate (SPN 3360, FMI 9)
- Conditions for Running the Diagnostics / Setting the Fault Code / Clearing the Fault Code
- Shop Talk — Possible Causes
- Associated Procedures Table (VGT Actuator 010-134, DEF Controller 011-057, ECM Calibration Code 019-032, Engine Wiring Harness 019-043)
- Step 1 — Check Active Fault Codes (including cross-check with Fault Codes 2636, 2771, 3232)
- Step 2 — Check DEF Controller Circuit (connector pins, voltage, adjustable parameter settings)
- Step 3 — Check OEM Harness (battery connections, open circuit in battery voltage supply)
- Step 4 — Check J1939 Data Link (open circuit, short circuit, terminating resistance 50–70 ohms)
- Step 5 — ECM Calibration Verification and Fault Code Clearing via INSITE™ Electronic Service Tool
Applicable truck models
This document applies to Cummins CM2250-controlled engines: ISB6.7, ISC8.3, ISL9, ISX11.9, and ISX15 platforms used in medium- and heavy-duty trucks from model years 2010–2012. Coverage spans multiple OEM installations where the aftertreatment DEF controller communicates with the ECM over J1939. When Fault Code 3597 is active, DEF injection is disabled, the amber CHECK ENGINE lamp illuminates, and engine torque is progressively reduced — ultimately limiting vehicle speed to 8 km/h (5 mph). For OEM-specific component locations and harness routing, consult Cummins official support resources.
Who needs this Fault Code 3597 DTCs manual
Diesel mechanics and workshop owners diagnosing a J1939 communication loss between the ECM and aftertreatment DEF controller on CM2250 engines need this procedure. It is essential for anyone troubleshooting SPN 3360 / FMI 9, checking wiring continuity, verifying terminating resistance, or performing ECM calibration updates with INSITE™.
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