2001-2020 Toyota Model Year Vehicles Techstream ECU Flash Reprogramming Procedure T-SB-0134-16 Revision 2


For the reprogramming procedure, please see T-SB-0134-16 Revision 2 here

The information contained in this bulletin supersedes SB No. T-SB-0012-13. Service Bulletin No. T-SB-0012-13 is obsolete and any printed versions should be discarded. Be sure to review the entire content of this bulletin before proceeding.

Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream ECU flash reprogramming process and outlines use of the Technical Information System (TIS) and the Calibration Update Wizard (CUW). Flash calibration updates can only be applied to the vehicle/ECU combination for which they are intended. ECUs have internal security that will not allow them to be programmed with another ECU’s information.

NOTE ECU is a Toyota term used to describe integrated computerized devices responsible for managing the operation of a system or subsystem. For the purposes of this bulletin, the term “ECU” is used as a generic label for the following SAE J1930 standard references:

Powertrain Control Module (PCM)
Engine Control Module (ECM)
Transmission Control Module (TCM)
Any other Toyota specific control unit

giorvy leyva

i have a blank 2018 yaris IA and it's not letting me lad the calibration file into it