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Home >> Lexus >> 2005 >> GX 470 >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Air Conditioning System - Diagnostics) >> Circuit Inspection >> Back-up Power Source Circuit >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2005 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

This is the back-up power source for the A/C amplifier. Power is supplied even when the ignition switch is off and is used for diagnostic trouble code memory, etc.

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