DTC 21: Solar Sensor Circuit: Description
WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
A photodiode in the solar sensor detects solar radiation and sends signals to the A/C amplifier.
DETECTION ITEM AND TROUBLE AREA
| DTC No. | Detection Item | Trouble Area |
|---|---|---|
| 21 | Open or short in solar sensor circuit Please note that display of diagnostic trouble code 21 is not abnormal when the sensor is not receiving solar radiation |
|