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Home >> Lexus >> 2019 >> UX 200 Base >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Continuously Variable Transaxle (CVT) System (K120) (Diagnostic Codes) (2 Of 2) & Circuit Tests) >> Continuously Variable Transaxle System >> ECU Power Source Circuit [10/2018 - 07/2022] >> Description

ECU Power Source Circuit [10/2018 - 07/2022]: Description

When the engine switch is turned on (IG), auxiliary battery voltage is applied to terminal MREL of the ECM through the coil of the EFI-MAIN relay. This causes the EFI-MAIN relay to close, which supplies power to terminal +B of the TCM.

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