Inspection Procedure

1. Use the Data List to check if the rear solar sensor is functioning properly.
   1. Intelligent tester

      AIR CONDITIONER 

      INTELLIGENT TESTER - AIR CONDITIONER REFERENCE CHART
      
      

      Tester Display	Measurement Item / Range	Normal Condition	Diagnostic Note
      REAR SOLAR SENS	Rear solar sensor / Min.: 0, Max.: 255	Rear solar sensor voltage increases as brightness increases	Open in circuit: 0 Short in circuit: 255

   2. Techstream

      Air Conditioner 

      TECHSTREAM - AIR CONDITIONER REFERENCE CHART
      
      

      Tester Display	Measurement Item / Range	Normal Condition	Diagnostic Note
      Rear Solar Sensor	Rear solar sensor / Min.: 0, Max.: 255	Rear solar sensor voltage increases as brightness increases	Open in circuit: 0 Short in circuit: 255

      OK: The display is as specified in the normal condition. 

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      NG	A
      OK (Checking from the PROBLEM SYMPTOMS TABLE)	B
      OK (Checking from the DTC)	C

B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

C: REPLACE AIR CONDITIONING AMPLIFIER (See  REMOVAL   ) 

A: GO TO NEXT STEP 

Fig 1: Inspecting Rear Solar Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the rear solar sensor (see REMOVAL  ).
2. Measure the resistance according to the value(s) in the table below.
3. Connect the positive (+) lead from the ohmmeter to terminal 1 and negative (-) lead to terminal 2 of the rear solar sensor.

   Standard resistance 

   REAR SOLAR SENSOR
   
   

   Tester Connection	Condition	Specified Condition
   1 - 2	Sensor is subjected to electric light	Below 1 Ω
   	Sensor is covered by a cloth	10 kΩ or higher

   HINT:

   • As the inspection light is moved away from the sensor, the voltage decreases.
   • Use an incandescent light for inspection. Bring it within 30 cm (11.8 in.) of the solar sensor.

NG: REPLACE REAR SOLAR SENSOR (See  REMOVAL   ) 

OK: GO TO NEXT STEP 

Fig 2: Checking Harness And Connector (Rear Solar Sensor - Rear Junction Block ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the v2 rear solar sensor connector.
2. Disconnect the S62 rear junction block ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   REAR SOLAR SENSOR - REAR JUNCTION BLOCK ECU
   
   

   Tester Connection	Condition	Specified Condition
   v2-1 - S62-26 (TSB)	Always	Below 1 Ω
   V2-2 - S62-18 (TSD)	Always	Below 1 Ω
   S62-26 (TSB) - Body ground	Always	10 kΩ or higher
   S62-18 (TSD) -Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)