On-Vehicle Inspection

CHECK AIR CONDITIONING SOLAR SENSOR

Disconnect the A/C solar sensor connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
L1-3 (CLTE) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
L1-6 (CLTB) - L1-3 (CLTE)	Engine switch on (IG)	10 to 14 V

Fig 1: Identifying Air Conditioning Solar Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT SOLAR SENSOR

Remove the A/C solar sensor with the connector still connected.
Apply battery voltage between terminals 6 (CLTB) and 3 (CLTE) of the A/C solar sensor.

Measure the voltage according to the value(s) in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
1 (TSL) - 3 (CLTE)	Sensor is subjected to electric light	0.8 to 4.3 V
1 (TSL) - 3 (CLTE)	Sensor is covered by a cloth	Below 0.8 V

Fig 2: Identifying Solar Sensor Connector Terminals

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 2 and negative (-) lead to terminal 1 of the solar sensor.

HINT:

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