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Home >> Lexus >> 1997 >> SC 400 >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - Theory & Operation) >> Computerized Engine Controls >> ECM Power Source >> Back-Up (Constant) Power

Back-Up (Constant) Power

WARNING: This page is about a different car, the 1997 Lexus SC 300. However, it is still accessible from the selected car via links, so may be relevant.

Battery power is supplied at all times to the ECM through the EFI fuse.

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