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Home >> Toyota >> 2004 >> Matrix Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 557 (Air Conditioning System - Diagnostics) >> Circuit Inspection >> Back - Up Power Source Circuit >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

This is the back up power source for the integration control and panel. Power is supplied even when the ignition switch is off and is used for diagnostic trouble code memory, etc.

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