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Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning >> Air Conditioning System >> Back-up Power Source Circuit >> Description
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Back-up Power Source Circuit: Description

This circuit supplies a back-up power source for the A/C amplifier. Power is supplied even if the ignition switch is OFF and is used for diagnostic trouble code memory, etc.

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