This Cummins 2347 fault document explains Fault Code 2347 for ISB, ISC, and ISL engines with CM2150 electronic control modules. It covers the calculated turbocharger compressor outlet temperature condition, the ECM response, likely causes, INSITE™ checks, and the guided steps used to verify and clear the code.
Official Cummins 2347 fault document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, and ISL with CM2150; ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; Electronic Control Module; Turbocharger Compressor Outlet Temperature (Calculated) |
| Publication no. | Not shown in extract |
| 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
- 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 sensor readings.
- Guided Step 3 – Clear the fault code.
Applicable truck models
This file applies to Cummins ISB, ISC, and ISL engines with CM2150, including the ISB6.7 CM2150 (2007-09) DTC group identified in the file record. The extract identifies the system as the Electronic Control Module and describes a calculated turbocharger compressor outlet air temperature fault, not a physical outlet temperature sensor. For official manufacturer information, visit Cummins official website.
Who needs this Cummins 2347 fault manual
This manual is for diesel mechanics, fleet technicians, and workshop owners diagnosing Fault Code 2347 with INSITE™ electronic service tool. It is useful when checking active turbocharger fault codes, inactive Fault Code 295 or 2973, ambient air pressure sensor accuracy, intake manifold pressure sensor accuracy, and final clearing of inactive codes.
The procedure explains that the ECM calculates turbocharger compressor outlet air temperature from operating inputs such as turbocharger compressor inlet air temperature, barometric pressure, turbocharger speed, engine speed, intake manifold air temperature, and intake manifold pressure. The fault is set when the calculated temperature is greater than 238°C [460°F], and the ECM limits fuel to reduce the calculated compressor outlet temperature. Shop Talk notes include checking ECM calibration on QuickServe® Online, possible air intake leaks drawing hot under-hood air, faulty intake manifold pressure readings, high turbocharger speed readings, faulty barometric pressure readings, and a stuck variable geometry turbocharger. The diagnostic may not be active under no-load shop conditions unless a barometric pressure sensor or intake manifold pressure sensor has failed, so the engine may need to be loaded to confirm the repair. The full PDF is available in the DiagTechPro manuals library, free account required to download.
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