This document is a Cummins code 227 troubleshooting procedure for the Sensor Supply 2 Circuit voltage above normal or shorted to high source fault. It explains the fault overview, diagnostic conditions, ECM response, connector inspection, circuit response testing, calibration checks, and clearing steps used with INSITE™ electronic service tool.
Official Cummins code 227 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, QSL9 CM2250, QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Sensor Supply 2 Circuit |
| Publication no. | 4022254, 4022257, 4022250, 2883445, 4022256, 4022255 listed in associated procedures |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting section Last Modified: 03-Jan-2011 |
| Pages | 9 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- FAULT CODE 227 – Sensor Supply 2 Circuit – Voltage Above Normal or Shorted to High Source
- 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 ECM.
- Guided Step 3 – Check ECM calibration and clear fault codes.
Applicable truck models
This file applies to Cummins CM2250 engine families named in the procedure: ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, ISX11.9 CM2250, ISX15 CM2250, QSL9 CM2250, and QSB6.7 CM2250. The fault concerns sensor supply number 2, a 5 VDC ECM supply used by sensors such as the camshaft position sensor, intake manifold pressure/temperature sensor, crankcase pressure sensor, engine oil pressure sensor if equipped, turbocharger compressor intake pressure/temperature sensor if equipped, and barometric pressure sensor if equipped. See the manufacturer at Cummins official website.
Who needs this Cummins code 227 manual
Workshop owners, diesel mechanics, and diagnostic technicians need this Cummins code 227 manual when an amber CHECK ENGINE lamp or MIL is present and INSITE™ reports SPN 3510 FMI 3/3. It is useful for deciding whether the problem is connector damage, a short to voltage in the engine harness sensor supply 2 line, ECM response, or an available ECM calibration update.
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