This Cummins 3328 troubleshooting manual is a diagnostic PDF for Fault Code 3328 on Cummins CM2250 engines. It explains Transmission Output Shaft Speed – Abnormal Update Rate, SPN 191 FMI 9/9, where the ECM detects no communication or an invalid data transfer rate on the SAE J1939 data link. The document is intended for service work using INSITE™ electronic service tool and OEM multiplexing information.
Official Cummins 3328 troubleshooting manual document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2250; also referenced: ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, QSB6.7 CM2250 |
| System/Group | ISB6.7 CM2250 (2010-12) / DTCs; Transmission Output Shaft Speed Circuit |
| Publication no. | Not stated in the file extract; associated bulletin numbers include 4022254, 4022257, 4022250, 2883445, 4022256, and 4022255 |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting steps Last Modified: 08-Dec-2010 |
| Pages | 13 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- FAULT CODE 3328 – Transmission Output Shaft Speed – Abnormal Update Rate
- 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 for ECM communication with the INSITE™ electronic service tool
- Guided Step 3 – Check the OEM VECU and engine ECM for proper multiplexing configuration
- Guided Step 4 – Check the service data link harness
- Guided Step 5 – Check the OEM harness
- Guided Step 6 – Check ECM calibration and clear fault codes
Applicable truck models
This file applies to Cummins CM2250 engine diagnostics where the engine ECM receives multiplexed component data from an OEM VECU or transmission ECU over SAE J1939. The extract identifies ISB6.7 CM2250 coverage and also lists ISX11.9 CM2250, ISC8.3 and ISL9 CM2250, ISX15 CM2250, GX CM2250, QSL9 CM2250, and QSB6.7 CM2250 in the associated ECM calibration code procedures. The procedure addresses the transmission output shaft speed message, the OEM harness, the service data link connector, VECU source addresses, connector pin condition, J1939 resistance checks, inactive fault verification, and ECM calibration revision checks. For official manufacturer information, visit Cummins official website.
Who needs this Cummins 3328 troubleshooting manual manual
Workshop owners, diesel mechanics, and fleet technicians need this Cummins 3328 troubleshooting manual when an amber CHECK ENGINE lamp or MIL is linked to Fault Code 3328 and the truck requires J1939 communication diagnosis. It is most useful when verifying OEM VECU multiplexing setup, inspecting harness and connector faults, checking 50 ohms to 70 ohms data link resistance, and confirming whether an ECM calibration update is needed.
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