Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Select the item below in the Data List, and read the display on the Techstream

   Data List / Air Conditioner 

   DATA LIST / AIR CONDITIONER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Evaporator Temp Sensor (Evap Temp)	Evaporator temperature sensor / Min -29 7°C (-21 46°F) Max 59 55°C (139 19°F)	Actual evaporator temperature is displayed	Open in circuit -29 7°C (-21 46°F) Short in circuit 59 55°C (139 19°F)

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

   Result 

   RESULT DESCRIPTION
   
   

   Result	Proceed to
   NG	A
   OK (When troubleshooting according to the Problem Symptoms Table)	B
   OK (When troubleshooting according to the DTC)	C

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

C: REPLACE A/C AMPLIFIER  (See REMOVAL  )

A: Go to next step 

1. Remove the evaporator temperature sensor.
2. Disconnect the evaporator temperature sensor connector.
3. Measure the resistance according to the value(s) in the table below

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATIONS
   
   

   Tester Connection	Condition	Specified Condition
   e2-1 - e2-2	-10°C (14°F)	7.30 to 9 10 kΩ
   e2-1 - e2-2	-5°C (23°F)	5.65 to 6.95 kΩ
   e2-1 - e2-2	0°C (32°F)	4.40 to 5.35 kΩ
   e2-1 - e2-2	5°C (41°F)	3.40 to 4.15 kΩ
   e2-1 - e2-2	10°C (50°F)	2 70 to 3 25 kΩ
   e2-1 - e2-2	15°C (59°F)	2 14 to 2.58 kΩ
   e2-1 - e2-2	20°C (68°F)	1.71 to 2.05 kΩ
   e2-1 - e2-2	25°C (77°F)	1.38 to 1.64 kΩ
   e2-1 - e2-2	30°C (86°F)	1 11 to 1.32 kΩ

   NOTE:

   • Hold the sensor only by its connector. Touching the sensor may change the resistance value.
   • When measuring, the sensor temperature must be the same as the ambient temperature.

   HINT.

   As the temperature increases, the resistance decreases (see the graph).

Fig 1: Identifying Evaporator Temperature Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE EVAPORATOR TEMPERATURE SENSOR  (See REMOVAL  )

OK: Go to next step 

1. Remove the air conditioning harness.
   1. Disconnect the A/C amplifier connector.
      Fig 2: Identifying A/C Amplifier Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATIONS
   
   

   Tester Connection	Condition	Specified Condition
   e1-6 (TE) - e2-2	Always	Below 1 Ω
   e1-5(SG) - e2-1	Always	Below 1 Ω
   e1-6 (TE) - Body ground	Always	10 kΩ or higher
   e1-5 (SG) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying E2 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE AIR CONDITIONING HARNESS  (See REMOVAL  )

OK: REPLACE A/C AMPLIFIER  (See REMOVAL  )