This document is Cummins VGT actuator fault troubleshooting for Fault Code 2198 on CM2150 engines. It explains the VGT actuator driver circuit fault, J1939 communication conditions, ECM actions, connector inspections, INSITE checks, and clearing steps. The file is a 9-page English PDF for shop diagnostic use.
Official Cummins VGT actuator fault document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL with CM2150 |
| System/Group | DTCs; VGT Actuator Driver Circuit |
| Publication no. | Not shown in the extract |
| Year/Revision | Last Modified: 20-Jul-2010; file year unknown |
| 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 fault codes.
- Guided Step 2 – Check the VGT actuator circuit.
- Guided Step 3 – Check the ECM and engine harness.
- Guided Step 4 – Clear the fault code.
Applicable truck models
This PDF covers the Cummins ISB6.7 CM2150 (2007-09) DTC group and includes text for ISB, ISC, and ISL with CM2150 when diagnosing Fault Code 2198. The procedures focus on the variable geometry turbocharger actuator located on the turbocharger bearing housing, the primary engine ECM, engine harness connectors, and the J1939 datalink. For manufacturer information, visit Cummins official website.
Who needs this Cummins VGT actuator fault manual
Mechanics, fleet technicians, and workshop owners need this Cummins VGT actuator fault manual when an amber CHECK ENGINE light is linked to Fault Code 2198, SPN 641, FMI 11/11. It helps confirm whether the issue is an intermittent J1939 message, VGT actuator power or ground problem, connector damage, ECM response issue, or actuator replacement case.
The troubleshooting path uses INSITE™ electronic service tool checks and asks whether Fault Code 2636 or Fault Code 2198 is active or inactive after specific key-on and connector conditions. It also lists inspection points such as loose connectors, corroded pins, bent or broken pins, pushed back or expanded pins, moisture, missing seals, dirt, broken connector shells, wire insulation damage, and damaged locking tabs. When a damaged connection is found, the document directs cleaning or harness, connector, and pin repair where possible. If connector removal and installation corrects the fault, no replacement is called for. If checks are completed and the fault remains, the procedure points to VGT actuator replacement or Cummins Authorized Repair Location support according to the decision path.
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