This Cummins 3525 troubleshooting document is a fault-code procedure for wheel-based vehicle speed received network data in error. It explains how the Cummins ECM receives multiplexed vehicle speed information over the SAE J1939 data link and how to verify VECU configuration, ECM calibration, and fault clearing with INSITE™ electronic service tool.
Official Cummins 3525 troubleshooting document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also references ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, and QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Vehicle Speed Sensor Circuit |
| Publication no. | Not shown in extract; associated bulletin numbers include 4022254, 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Last Modified: 11-Jun-2010 and 08-Dec-2010 |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Fault Code 3525 – Wheel-Based Vehicle Speed – Received Network Data In Error
- 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 OEM VECU and engine ECM for proper multiplexing configuration
- Guided Step 3 – Check ECM calibration and clear fault codes
Applicable truck models
This file applies to Cummins CM2250 engine platforms listed in the procedure, including ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, and QSB6.7 CM2250. The procedure is for vehicles where the OEM VECU or transmission electronic control unit sends wheel-based vehicle speed and other multiplexed component information to the Cummins ECM over the SAE J1939 data link. For OEM-specific VECU location, wiring, source addresses, and sensor repair information, the document directs technicians to the appropriate OEM service manual. Manufacturer information is available at Cummins official website.
Who needs this Cummins 3525 troubleshooting manual
Workshop technicians, fleet mechanics, and diagnostic tool users need this Cummins 3525 troubleshooting manual when Fault Code 3525 is active with SPN 84 FMI 19 and an amber CHECK ENGINE lamp or MIL. It helps confirm whether the issue is an OEM wheel-based vehicle speed sensor or VECU concern, an incorrect Cummins ECM multiplexing setup, or a calibration level that needs review under Procedure 019-032.
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