This document is a Cummins 2449 VGT actuator troubleshooting procedure for a VGT actuator controller out-of-calibration fault. It explains the fault reason, diagnostic conditions, clearing conditions, guided checks, related Cummins procedures, and repair decisions for the VGT actuator and turbocharger system.
Official Cummins 2449 VGT actuator document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, with associated coverage also listing ISL8.9 CM2150 SN, ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; VGT Actuator Controller Circuit |
| Publication no. | 4022254 for ISB6.7 CM2250; associated bulletin numbers include 4022190, 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Last Modified: 11-Jun-2010 and 20-Jul-2010 |
| Pages | 14 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 2449 – VGT Actuator Controller – Out of Calibration
- 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 and previous service history.
- Guided Step 2 – Check the VGT actuator.
- Guided Step 2C – Inspect the turbocharger shaft movement.
- Guided Step 3 – Check ECM calibration and clear fault
Applicable truck models
This PDF applies to Cummins electronic engine platforms listed in the procedure tables, including ISB6.7 CM2250 and related CM2250 engine families where Fault Code 2449 is used for the VGT Actuator Controller – Out of Calibration condition. The document also references ISL8.9 CM2150 SN, ISC8.3 and ISL9 CM2250, ISX15 CM2250, ISX11.9 CM2250, QSL9 CM2250, and QSB6.7 CM2250 in the associated procedures table. The fault is tied to the electronic variable geometry turbocharger actuator, the J1939 data link, ECM diagnostics, turbocharger bearing housing actuator location, and the key-on diagnostic that runs after the keyswitch has been off for more than 30 seconds. See the manufacturer at Cummins official website.
Who needs this Cummins 2449 VGT actuator manual
Workshop technicians, fleet maintenance staff, and diesel diagnostic specialists need this 2449 VGT actuator manual when Fault Code 2449 is active after a VGT actuator has been removed, replaced, or installed out of position. It is useful when checking INSITE™ fault status, connector condition, actuator gear movement, turbocharger nozzle movement, ECM calibration level, and the required key-cycle validation.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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