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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 >> DTC 21: Solar Sensor 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.

A photo diode in the solar sensor detects solar radiation and sends signals to the integration control and panel.

Fig 1: Solar Radiation And Photo Diode Resistance Variation Graph
G02839058Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: DTC Detection Chart
G02839059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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