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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 358 (Air Conditioning System - Diagnostics) >> Circuit Inspection >> PTC Heater Circuit (Quick Heater) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

A/C amplifier switches the HTR3 relay ON by signal from the A/C amplifier. It supplies power to PTC heater (Quick heater).