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Home >> Toyota >> 2002 >> 4Runner Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic HVAC Systems >> Circuit Inspection >> Back Up Power Source Circuit >> Circuit Description

Circuit Description

This is the back-up power source for the A/C control assembly. Power is supplied even when the ignition switch is off and is used for DTC memory, etc.

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