TSBs

Toyota Updates Trailer Brake Control

Jan. 23, 2023

Some owners of 2016-2017 Toyota Tundra trucks have expressed dissatisfaction with the braking feel of the integrated trailer brake controller. Revised software for the trailer brake control ECU has been developed to provide an alternative trailer braking feel. Toyota notes that the brake control relay with bracket should not be replaced as part of this repair procedure.

Information courtesy of Mitchell 1,

Mike Mavrigian

Choose the desired ECU group(s) in the Health Check dialog box.

Check for the existing calibration ID.
|Photo Credit: Mitchell 1

Toyota says to use Techstream with software version 12.10.018 or later. Do not use Techstream Lite or the TDT diagnostic tester for the reprogramming. With Techstream connected (and GR8 battery station for maintaining correct voltage), click the Health button on the system select tab. Click Next. Click “continue” to view Health Check results. Is the calibration ID listed in the ECU the latest? If yes, continue with normal diagnostics. If no, flash reprogram the trailer brake control ECU. Previous calibration IDs may be 8954F0C011 or 8954F0C012. The new calibration ID is 8954F0C013.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.