This VGT actuator troubleshooting DTCs document explains Fault Code 2634 for the electronically controlled variable geometry turbocharger actuator. It covers the circuit description, fault conditions, guided diagnostic steps, connector inspection, aftertreatment checks, ECM calibration review, and fault clearing procedure for the Cummins CM2150 platform.
Official VGT actuator troubleshooting DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150; extract also references ISB, ISC, and ISL CM2150 service procedures |
| System/Group | DTCs; ISB, ISC, and ISL – VGT Actuator Circuit |
| Publication no. | Bulletin 4021578 and Bulletin 4021569 referenced for related service procedures |
| Year/Revision | Last Modified: 20-Jul-2010 |
| Pages | 9 |
| 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 VGT actuator installation.
- Guided Step 2 – Check the VGT actuator.
- Guided Step 3 – Check for progressive damage.
- Guided Step 4 – Check ECM calibration and clear fault codes.
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 fault diagnostics and references ISB, ISC, and ISL engines where the VGT actuator communicates with the primary engine ECM over the J1939 data link. The procedure is centered on Fault Code 2634, SPN 641, FMI 12/12, where the VGT Actuator Controller reports a bad intelligent device or component and VGT actuation is disabled. For manufacturer information, visit Cummins official website.
Who needs this actuator troubleshooting DTCs manual
This actuator troubleshooting DTCs manual is intended for mechanics, fleet technicians, and workshop owners diagnosing a red STOP ENGINE lamp, active Fault Code 2634, or VGT actuator installation problems after actuator removal or replacement. It is also useful when checking connector pins, harness damage, diesel particulate filter progressive damage, INSITE™ fault status, and ECM calibration revision history.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
