Inspection Procedure

1. Connect Techstream to the DLC3.
2. Turn the ignition switch ON and turn Techstream ON.
3. Select the item below in the Data List, and read the value displayed on Techstream.

   Air conditioning amplifier 

   DATA LIST - AIR CONDITIONING AMPLIFIER
   
   

   Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
   Solar Sensor (D side)	Driver side solar sensor / Min.: 0, Max.: 255	Driver side temperature increases as brightness increases	-

   OK: 

   The display is as specified in the normal condition column. 

   Result 

   RESULT REFERENCE
   
   

   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 

C: REPLACE AIR CONDITIONING AMPLIFIER 

A: Go to next step 

1. Remove the solar sensor.
2. Measure the resistance of the sensor.
   Fig 1: Identifying Solar Sensor TSD And S5 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect the ohmmeter's positive (+) lead to terminal 1 and the negative (-) lead to terminal 3 of the solar sensor.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   1 (S5) - 3 (TSD)	Sensor exposed to electric light	Except ∞ Ω
   1 (S5) - 3 (TSD)	Sensor covered with cloth	∞ Ω (No continuity)

   NOTE: The connection procedure for using a digital tester such as an electrical tester is shown above. When using an analog tester, connect the positive (+) lead to terminal 3 and the negative (-) lead to terminal 1 of the solar sensor.

   HINT:

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

NG: REPLACE SOLAR SENSOR 

OK: Go to next step 

1. Disconnect the F1 sensor connector.
2. Disconnect the E37 amplifier connector.
   Fig 2: Identifying F1 And E37 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   E37-33 (TSD) - F1-3 (TSD)	Below 1 Ω
   E37-31 (S5-4) - F1-1 (S5)	Below 1 Ω
   E37-33 (TSD) - Body ground	1 MΩ or higher
   E37-31 (S5-4) - Body ground	1 MΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE AIR CONDITIONING AMPLIFIER