This Cummins Code 731 document is a diagnostic fault-code PDF for the Cummins ISB6.7 CM2150 engine family. It explains Fault Code 731, where the ECM detects that the engine speed/position camshaft and crankshaft signals do not match, causing an amber CHECK ENGINE lamp, possible derate, hard start, and rough idle.
Official Cummins Code 731 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL with CM2150 |
| System/Group | DTCs; Engine Magnetic Speed/Position Sensor Circuit |
| Publication no. | Not shown in extract |
| Year/Revision | Last Modified: 20-Jul-2010; file year unknown |
| Pages | 4 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- FAULT CODE 731
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Possible causes for this fault code
- Refer to Troubleshooting Fault Code t05-731
Applicable truck models
This file applies to Cummins ISB6.7 CM2150 engines in the 2007-09 coverage group. The extract also names ISB, ISC, and ISL with CM2150 under the Engine Magnetic Speed/Position Sensor Circuit, but it does not list truck makes, chassis models, VIN ranges, or equipment platforms. For official product and service information, visit Cummins official website.
Who needs this Cummins Code 731 manual
Workshop owners, diesel mechanics, and diagnostic technicians need this Cummins Code 731 manual when troubleshooting a mismatch between the crankshaft position signal and camshaft position signal. It is useful when the engine is derated, starts hard, idles rough, or sets an amber CHECK ENGINE lamp tied to SPN 723 FMI 7/7.
The document describes hall effect crankshaft and camshaft position sensors, the ECM 5-VDC supply and return circuits, and how the ECM uses the missing tooth on the crankshaft gear to determine engine position. It also directs technicians to verify ECM calibration, check QuickServe Online calibration revision history, and consider recalibration when applicable. The listed likely causes are loose or incorrectly aligned engine speed sensor rings and mechanical misalignment between the crankshaft engine position sensor and camshaft engine position sensor.
Full PDF available in the DiagTechPro manuals library, free account required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
