SOLAR SENSOR INSPECTION

PROCEDURE

1. INSPECT COOLER (SOLAR SENSOR) THERMISTOR (for Single Type)

   1. Check the wire harness

      1. Disconnect the E28 air conditioning amplifier assembly connector.

      2. Disconnect the F4 cooler (solar sensor) thermistor connector.

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         F4-1 (SS+) - E28-30 (S5-1)	Always	Below 1 Ω
         F4-2 (SS-) - E28-33 (TSD)	Always	Below 1 Ω
         F4-1 (SS+) - Body ground	Always	10 kΩ or higher
         F4-2 (SS-) - Body ground	Always	10 kΩ or higher

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

      4. Reconnect the E28 air conditioning amplifier assembly connector.

      5. Turn the ignition switch to ON.

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

         Standard Voltage

         Tester Connection	Condition	Specified Condition
         F4-1 (SS+) - F4-2 (SS-)	Ignition switch off	Below 1 V
         F4-1 (SS+) - F4-2 (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 (solar sensor) thermistor.

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

      2. Turn the ignition switch to ON.

      3. 

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

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

         Standard Voltage

         Tester Connection	Condition	Specified Condition
         F4-1 (SS+) - F4-2 (SS-)	Sensor is subjected to electric light	0.8 to 4.3 V
         F4-1 (SS+) - F4-2 (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 (solar sensor) thermistor.

         • 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 (solar sensor) thermistor.

         • 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 (solar sensor) thermistor.

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

2. INSPECT COOLER (SOLAR SENSOR) THERMISTOR (for Dual Type)

   1. Check the wire harness

      1. Disconnect the E28 air conditioning amplifier assembly connector.

      2. Disconnect the F1 cooler (solar sensor) thermistor connector.

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

         Standard Resistance

         Tester Connection	Condition	Specified Condition
         F1-1 (S5) - E28-30 (S5-1)	Always	Below 1 Ω
         F1-3 (TSD) - E28-33 (TSD)*A	Always	Below 1 Ω
         F1-2 (TSD) - E28-33 (TSD)*B	Always	Below 1 Ω
         F1-2 (TSP) - E28-32 (TSP)*A	Always	Below 1 Ω
         F1-3 (TSP) - E28-32 (TSP)*B	Always	Below 1 Ω
         F1-1 (S5) - Body ground	Always	10 kΩ or higher
         F1-3 (TSD) - Body ground*A	Always	10 kΩ or higher
         F1-2 (TSD) - Body ground*B	Always	10 kΩ or higher
         F1-2 (TSP) - Body ground*A	Always	10 kΩ or higher
         F1-3 (TSP) - Body ground*B	Always	10 kΩ or higher

         • *A: for LHD

         • *B: for RHD

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

      4. Reconnect the E28 air conditioning amplifier assembly connector.

      5. Turn the ignition switch to ON.

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

         Standard Voltage

         Tester Connection	Condition	Specified Condition
         F1-1 (S5) - F1-3 (TSD)*A	Ignition switch off	Below 1 V
         F1-1 (S5) - F1-3 (TSD)*A	Ignition switch ON	4.75 to 5.25 V
         F1-1 (S5) - F1-2 (TSD)*B	Ignition switch off	Below 1 V
         F1-1 (S5) - F1-2 (TSD)*B	Ignition switch ON	4.75 to 5.25 V
         F1-1 (S5) - F1-2 (TSP)*A	Ignition switch off	Below 1 V
         F1-1 (S5) - F1-2 (TSP)*A	Ignition switch ON	4.75 to 5.25 V
         F1-1 (S5) - F1-3 (TSP)*B	Ignition switch off	Below 1 V
         F1-1 (S5) - F1-3 (TSP)*B	Ignition switch ON	4.75 to 5.25 V

         • *A: for LHD

         • *B: for RHD

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

   2. Check the cooler (solar sensor) thermistor.

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

      2. Turn the ignition switch to ON.

      3. 

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

         

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

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

         Standard Voltage

         for LHD

         Tester Connection	Condition	Specified Condition
         F1-1 (S5) - F1-3 (TSD)	Sensor is subjected to electric light	0.8 to 4.3 V
         F1-1 (S5) - F1-3 (TSD)	Sensor is covered with a cloth	Below 0.8 V
         F1-1 (S5) - F1-2 (TSP)	Sensor is subjected to electric light	0.8 to 4.3 V
         F1-1 (S5) - F1-2 (TSP)	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 or 3 of the cooler (solar sensor) thermistor.

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

         Standard Voltage

         for RHD

         Tester Connection	Condition	Specified Condition
         F1-1 (S5) - F1-2 (TSD)	Sensor is subjected to electric light	0.8 to 4.3 V
         F1-1 (S5) - F1-2 (TSD)	Sensor is covered with a cloth	Below 0.8 V
         F1-1 (S5) - F1-3 (TSP)	Sensor is subjected to electric light	0.8 to 4.3 V
         F1-1 (S5) - F1-3 (TSP)	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 or 3 of the cooler (solar sensor) thermistor.

         • 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 (solar sensor) thermistor.

         • 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 (solar sensor) thermistor.

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