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Home >> Lexus >> 2007 >> LS 460 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Automatic Transmission System >> TCM Power Source Circuit >> Description

TCM Power Source Circuit: Description

When the engine switch is turned on (IG), voltage from the ECM's MREL terminal is applied to the EFI MAIN 2 relay. This causes the contacts of the EFI MAIN 2 relay to close, which supplies power to terminal +B of the TCM.

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