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October 23, 2014 Service bulletin

Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash calibration...

Lexus technical service bulletin L-SB-0021-14 Rev for 2007-2015 Lexus ES350, 2007-2015 Lexus RX350 and 2001-2003 Lexus RX300 and others.

Bulletin number
L-SB-0021-14 Rev
Component
Equipment: electrical
Summary
TSB: Flash reprogramming allows the 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.

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