This Cummins 3527 fault code document is a troubleshooting manual for an accelerator pedal or lever idle validation switch network data error. It explains how the Cummins ECM receives J1939 multiplexed component information from an OEM VECU or transmission electronic control unit. The fault effect stated in the file is that the engine will only idle.
Official Cummins 3527 fault code document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs |
| Publication no. | 4022254 for ISB6.7 CM2250; associated bulletins also list 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Last Modified: 11-Jun-2010 and 06-Dec-2010 |
| Pages | 7 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Fault Code 3527
- 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 OEM VECU and engine ECM for proper multiplexing configuration.
- Guided Step 3 – Check ECM calibration and clear fault codes.
Applicable truck models
The procedure applies to Cummins CM2250 engine families shown in the extract, including ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The document does not name truck makes or chassis models because J1939 data link wiring and VECU location vary by OEM, and it instructs the technician to refer to the OEM service manual for those details. For manufacturer information, visit Cummins official website.
Who needs this Cummins 3527 fault code manual
This manual is for diesel technicians, fleet maintenance staff, and workshop owners diagnosing SPN 558 FMI 19 with a red STOP ENGINE lamp or MIL. It is useful when checking INSITE fault status, OEM VECU multiplexing setup, ECM source addresses, and ECM calibration revision history.
The troubleshooting flow starts with confirming whether Fault Code 3527 is active using INSITE™ electronic service tool. It then compares OEM VECU multiplexed component enables and source addresses against the engine ECM configuration. If the setup does not match, the repair direction is to enable the proper multiplexed components and confirm the OEM VECU source addresses. If the setup does match, the document points to an OEM issue with the accelerator pedal or lever idle validation switch or OEM VECU.
The final section checks whether an ECM calibration update is available for this Cummins 3527 fault code condition. The file directs the technician to compare the ECM code and revision number against the ECM Calibration Revision History, then calibrate the ECM if needed under Procedure 019-032. The repair is validated by operating the engine under the stated clearing conditions and confirming the fault becomes inactive.
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