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Home >> Lexus >> 1990 >> LS 400 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Testing >> Back-Up Power Source Circuit >> Notes

Back-Up Power Source Circuit: Notes

Cruise control ECU back-up power source circuit provides power even when ignition switch is Off and is used for diagnostic code memory. DOME fuse in engine compartment fuse/relay block provides power to back-up power source circuit