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Home >> Lexus >> 1999 >> SC 400 V8-4.0L (1UZ-FE) >> Repair and Diagnosis >> Heating and Air Conditioning >> Control Assembly >> Testing and Inspection >> Related Diagnostic Procedures >> Automatic Control Switch Circuit
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Automatic Control Switch Circuit

CIRCUIT DESCRIPTION




The SW contact is ON while the automatic control SW is pushed, and turns OFF when automatic control SW is released. When the SW is turned ON, the voltage at the SAUTO terminal of A/C control assembly is almost 0 V and the ECU begins fully automatic control of the blower speed, air inlet, air outlet and compressor operation.




WIRING DIAGRAM

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INSPECTION PROCEDURE