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
   Ambient Temp Sensor (Ambi Temp Sens)	Ambient temperature sensor / Min -23 3°C (-9 94°F), Max 65 95°C (150 71°F)	Actual ambient temperature is displayed	Open in circuit -23 3°C (-9 94°F) Short in circuit 65 95°C (150 71°F)

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

   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 ambient temperature sensor
2. Disconnect the ambient 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
   B5-1 - B5-2	10°C (50°F)	3 00 to 3.73 kΩ
   B5-1 - B5-2	15°C (59°F)	2.45 to 2 88 kΩ
   B5-1 - B5-2	20°C (68°F)	1 95 to 2.30 kΩ
   B5-1 - B5-2	25°C (77°F)	1.60 to 1.80 kΩ
   B5-1 - B5-2	30°C (86°F)	1.28 to 1.47 kΩ
   B5-1 - B5-2	35°C (95°F)	1 00 to 1.22 kΩ
   B5-1 - B5-2	40°C (104°F)	0.80 to 1.00 kΩ
   B5-1 - B5-2	45°C (113°F)	0.65 to 0.85 kΩ
   B5-1 - B5-2	50°C (122°F)	0.50 to 0.70 kΩ
   B5-1 - B5-2	55°C (131°F)	0 44 to 0.60 kΩ
   B5-1 - B5-2	60°C (140°F)	0.36 to 0.50 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 Ambient Temperature Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE AMBIENT TEMPERATURE SENSOR  (See REMOVAL  )

OK: Go to next step 

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
   J58-36 (TAM) - B5-1	Always	Below 1 Ω
   J58-37 (SG) - B5-2	Always	Below 1 Ω
   J58-36 (TAM) - Body ground	Always	10 kΩ or higher
   J58-37 (SG) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying B5 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE A/C AMPLIFIER  (See REMOVAL  )