This Cummins turbocharger speed sensor document explains Fault Code 2345 diagnostics for the turbocharger speed circuit. It describes the sensor circuit, fault conditions, ECM response, inspection steps, and INSITE procedures for ISB, ISC, and ISL engines with CM2150 control.
Official Cummins turbocharger speed sensor document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, and ISL with CM2150; file group ISB6.7 CM2150 (2007-09) |
| System/Group | Turbocharger 1 Speed Circuit / DTCs |
| Year/Revision | Last Modified: 20-Jul-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
- Conditions for Setting the Fault Codes
- FAULT CODE 2345
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check for additional fault codes.
- Guided Step 2 – Check the turbocharger.
- Guided Step 3 – Clear the fault codes.
Applicable truck models
This PDF applies to Cummins ISB, ISC, and ISL engines with CM2150 electronic control, including the listed ISB6.7 CM2150 (2007-09) diagnostic group. The document covers Fault Code 2345, PID P103, SPN 103, FMI 10/10, where the ECM detects a turbocharger speed increase faster than physically achievable and uses an estimated turbocharger speed. For brand information and official support resources, visit Cummins official website.
Who needs this Cummins turbocharger speed sensor manual
Workshop owners, diesel mechanics, and diagnostic technicians need this turbocharger speed sensor manual when checking an amber CHECK ENGINE light related to abnormal turbocharger speed rate of change. It is useful when inspecting the engine harness, turbocharger speed sensor connections, sensor nose condition, connector seals, and inactive fault code status with INSITE electronic service tool.
The procedure directs the technician to check for Fault Code 686 and/or 687 first, inspect for loose connectors, corroded pins, bent or broken pins, pushed back or expanded pins, moisture, dirt, damaged wire insulation, broken connector shells, and damaged locking tabs. It also states that an inactive Fault Code 2345 after connector removal and installation can indicate that the connection was corrected, while unresolved cases return to troubleshooting steps or a Cummins Authorized Repair Location.
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