SOLAR SENSOR (for Automatic Air Conditioning System): Inspection

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT SOLAR SENSOR

Using an ohmmeter, connect the positive lead to terminal 2 and the negative lead to terminal 1, then measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Connection	Specified Condition
1 - 2	Sensor subject to electric light	Except ∞ Ω
1 - 2	Sensor covered with a cloth	∞ Ω

Fig 1: Identifying Solar Sensor Connectors

NOTE: The connection procedure for using a digital tester such as a TOYOTA electrical tester is shown above. When using an analog tester, connect the positive (+) lead to terminal 1 and the negative (-) lead to terminal 2 of the A/C solar sensor.

HINT:

As the inspection light is moved away from the sensor, the voltage increases.
Use an incandescent lamp for inspection. Bring it within 30 cm (11.8 in.) of the A/C solar sensor.

If the result is not as specified, replace the solar sensor.