SOLAR SENSOR(for Automatic Air Conditioning System) INSPECTION

PROCEDURE

1. Click here

   INSPECT COOLER THERMISTOR (SOLAR SENSOR)

   
   
   1. 

      *a	Component without harness connected (Cooler Thermistor (Solar Sensor))
      *b	Component without harness connected (Air Conditioning Amplifier Assembly)

      Check the wire harness.

      
      

      1. Disconnect the G33 air conditioning amplifier assembly connector.

      2. Disconnect the H4 cooler thermistor (solar sensor) connector.

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

         Standard Resistance
         Tester Connection Condition Specified Condition H4-1 (SS+) - G33-30 (S5-3) Always Below 1 Ω H4-2 (SS-) - G33-33 (TSD) Always Below 1 Ω H4-1 (SS+) - Body ground Always 10 kΩ or higher H4-2 (SS-) - Body ground Always 10 kΩ or higher

         
         

         • If the resistance is not as specified, repair the wire harness.

      4. Reconnect the G33 air conditioning amplifier assembly connector.

      5. Turn the ignition switch to ON.

      6. 

         *a	Component with harness connected (Cooler Thermistor (Solar Sensor))

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

         Standard Voltage
         Tester Connection Condition Specified Condition H4-1 (SS+) - H4-2 (SS-) Ignition switch off Below 1 V H4-1 (SS+) - H4-2 (SS-) Ignition switch ON 4.75 to 5.25 V

         
         

         • If the voltage is not as specified, replace the air conditioning amplifier assembly.

   2. Check the cooler thermistor (solar sensor).

      
      

      1. Reconnect the connector to the cooler thermistor (solar sensor).

      2. Turn the ignition switch to ON.

      3. 

         *a	Component with harness connected (Cooler Thermistor (Solar Sensor))

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

         Standard Voltage
         Tester Connection Condition Specified Condition H4-1 (SS+) - H4-2 (SS-) Sensor is subjected to electric light 0.8 to 4.3 V H4-1 (SS+) - H4-2 (SS-) Sensor is covered with a cloth Below 0.8 V

         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 negative (-) lead to terminal 1 and the positive (+) lead to terminal 2 of the cooler thermistor (solar sensor).

         • Do not bring the positive and negative tester probes too close to each other as a short circuit may occur.

         Tip:
         

         • Use an incandescent light for inspection. Bring it within about 30 cm (11.8 in.) of the cooler thermistor (solar sensor).

         • As the inspection light is moved away from the sensor, the voltage decreases.

         • Check from the rear of the connector while it is connected to the cooler thermistor (solar sensor).

         
         

         • If the voltage is not as specified, replace the cooler thermistor (solar sensor).