This Cummins J1939 fault 427 document is a troubleshooting PDF for Fault Code 427 on Cummins CM2150 engine controls. It explains an SAE J1939 Datalink abnormal update rate condition, where ECM communication with another J1939 device has been lost. The file is written for diagnostic work using INSITE™ electronic service tool and INLINE™ II.
Official Cummins J1939 fault 427 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09); extract also references ISB, ISC, and ISL with CM2150 |
| System/Group | DTCs; SAE J1939 Data Link Circuit |
| Publication no. | Not specified |
| 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 SAE J1939 communication.
- Guided Step 1A – Check for ECM communication with INSITE™ electronic service tool.
- Guided Step 1B – Inspect the OEM harness and ECM connector pins.
- Guided Step 1C – Check ECM communications with the ECM bench calibration harness.
- Guided Step 2 – Clear the fault codes.
- Guided Step 2A – Disable the fault code.
- Guided Step 2B – Clear the inactive fault codes.
Applicable truck models
This document covers Cummins ISB6.7 CM2150 applications from the 2007-09 group and also identifies the circuit as applying to ISB, ISC, and ISL with CM2150. Vehicle-side SAE J1939 data link wiring, OEM harness routing, ABS controllers, autoshift transmissions, ASR systems, electronic displays, electronic information systems, VECUs, and other OEM devices vary by vehicle manufacturer, so the procedure directs users to the OEM troubleshooting and repair manual when the ECM circuit checks good. For official manufacturer information, visit Cummins.
Who needs this Cummins J1939 fault 427 manual
Workshop technicians, fleet mechanics, and diagnostic tool users need this manual when an engine logs Fault Code 427 with SPN 639 and FMI 9/9. It supports checks for ECM communication, connector pin damage, OEM harness faults, bench calibration harness communication, and inactive fault-code clearing.
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