TCH-29-004 Service Bulletin/Repair Instructions

Technical Bulletin

Bulletin No: TCH-29-004 Rev 003
Subject:
Initial Release Date: 4/16/25
Revision Date: 12/11/25
Page: 1 of 3
Bendix™ FLC-25™ Parameter Update – PACCAR®
This bulletin provides instructions on how to download and run the Bendix ECU (Electronic Control Unit) Updater tool to

resolve incorrect parameter settings on FLC-25 cameras. This document is ONLY applicable for impacted Peterbilt® and

Kenworth® vehicles. Contact PACCAR® for information on affected vehicles.
SOFTWARE UPDATE INSTRUCTIONS

NOTE: To download the software and perform the update,

a Windows® PC (Windows 10 or 11 is recommended) with

the standalone update utility downloaded, a compatible

adapter, and the manufacturer’s Windows drivers for the

adapter are required.
7. Upon first use, select the option that corresponds

to the vehicle communication device configuration.

Once selected, click Save. See Figure 2.
1. Install the Bendix ECU Updater tool distributed by

PACCAR® by clicking the “setup” file and following

the prompts. See Figure 1 for folder contents.
Figure 1 – Bendix ECU Updater Tool Folder Contents

2. Place the “Update Packages” folder in a convenient

location on the laptop, such as the Desktop.
Figure 2 – Select Vehicle Configuration

8. Next, click Browse and navigate to the “Update

Packages” folder placed in a location on the

connected laptop in Step 2. See Figure 3.
3. Plug a compatible adapter to the diagnostic port

located under the steering wheel.

4. Connect the vehicle to a battery charger.

5. Key on the vehicle and inspect the vehicle dash

to see if any warning lamps are illuminated before

beginning the update process.

NOTE: Resolve all Bendix device Diagnostic

Trouble Codes (DTCs) before proceeding with the

Bendix ECU Updater tool installation.

6. Open the Bendix ECU Updater utility from the

connected laptop.

Figure 3 – Browse for Update Packages Folder
Bulletin No: TCH-29-004 Rev 003
Initial Release Date: 4/16/25
Revision Date: 12/11/25
9. Select the applicable update pack file that

corresponds with the vehicle and click Open. See

Figure 4.

•
For Kenworth vehicles, select:

“KW_EC80_005_0.pkg”
•
For Peterbilt vehicles, select:

“PB_EC80_004_0.pkg”
Page: 2 of 3
11. In the Settings window, click Next to start the

update. See Figure 6.
NOTE: The Kenworth (KW) software pack is used

as an example in these instructions. Select the

appropriate file that corresponds to the vehicle.
Figure 6 – Start Software Update

12. The software update will warn the user that changes

will be made to the ECU. To continue with the

software update, click Yes. See Figure 7.
Figure 4 – Select Update Pack

10. Once selected, click Next to load the software

update. See Figure 5.
Figure 7 – Update to ECU Message
Figure 5 – Load Software Update
Bulletin No: TCH-29-004 Rev 003
Initial Release Date: 4/16/25
Revision Date: 12/11/25
13. If the incorrect software update pack is selected

or if the software update is not compatible with the

vehicle VIN, the user will receive an error message

(Figure 8). Select the appropriate software update

pack to continue or contact PACCAR for more

information.
Page: 3 of 3
15. If the update is successful, the screen will show that

the software has been updated, and the procedure

is complete. See Figure 10. Follow PACCAR

guidelines to document the software update.
Figure 10 – Software Update Successful

Figure 8 – ECU Update Failed - Ineligible VIN

14. Once the update has started, the screen will show

the progress. See Figure 9.

NOTE: This process may take a couple of minutes

to complete.
16. To complete the software update, follow these

steps:

a. Key off the vehicle.

b. Wait at least ten (10) seconds.

c.
Key on the vehicle (engine crank not required).
d. Wait at least sixty (60) seconds and confirm that

there are no faults on the vehicle.

e. On the connected laptop, exit the software

update utility.

f.
Key cycle the vehicle again, start the engine,

and leave the vehicle running for at least sixty

(60) seconds to fully complete the update.
17. Disconnect the battery charger.
TECHNICAL SUPPORT

Figure 9 – Progress Screen
For support, first refer to the OEM instructions provided

by PACCAR®. Additional support is available from Bendix

by phone at 1-800-755-6888. Bendix representatives are

available Monday through Friday, 8:00 a.m. to 5:00 p.m. ET.
Any references in this document to PACCAR, PETERBILT, KENWORTH, and WINDOWS are solely for identification and cross reference purposes.

The trademarks are the property of their respective companies.

Unless otherwise indicated, the trademarks used in this document, including Bendix, are United States trademarks

owned by, or licensed to, Bendix Commercial Vehicle Systems LLC.

© 12/2025 Bendix Commercial Vehicle Systems LLC, a member of Knorr-Bremse • All Rights Reserved

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