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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 267 (HVAC - Diagnostics) >> Diagnostic Tests >> DTC 21: Solar Sensor Circuit >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 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: Graphing Photo Diode Resistance To Detected Solar Radiation Relationship
G01118893Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: DTC 21 Detected Conditions & Trouble Areas
G01118894Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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