October 30, 2019 Service bulletin

Flash reprogramming allows the Electric Control Unit (ECU) software to be updated without replacing the...

Toyota technical service bulletin T-SB-0151-19 for 2020 Toyota Supra.

Bulletin number: T-SB-0151-19
Component: Electrical system
Summary: TSB: Flash reprogramming allows the Electric Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for the Supra are released as field-fix procedures described in individual service bulletins. This bulletin details the ECU flash reprogramming process and outlines use of the Toyota-ISTA Diagnostic Software. BEFORE beginning any reprogramming, ensure that the latest version of Toyota-ISTA is downloaded and installed from TIS. 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

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