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Home >> Lexus >> 1991 >> ES 250 Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Control Unit >> Notes
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Control Unit: Notes

The Electronic Control Unit (ECU) is a microprocessor that controls all engine and transmission management functions. ECU receives signals from sensors, switches, ignition system and starting system. The ECU is located under center section of dash panel on ES250 and below glove box on LS400.

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