Recirculated/Fresh Air Modes Switch without User Input [08/2023 - ]: Procedure

1. Read the Data List according to the display on the GTS.

   Body Electrical > Air Conditioner > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Efficient Ventilation Mode	Function to automatically change ambient air induction and room circulation is set.	OFF / ON	Customized value displayed	-

   Body Electrical > Air Conditioner > Data List 

   Tester Display
   Efficient Ventilation Mode

   Result

   Result	Proceed to
   Efficient Ventilation Mode is set to "OFF"	A
   Efficient Ventilation Mode is set to "ON"	B

Result: 

B 

CUSTOMIZE SETTING (Efficient Ventilation Mode to "OFF") 

Result: 

A 

See step  2

Result

Result: 

B 

See step  6

Result: 

A 

See step  3

1. Read the Data List according to the display on the GTS.

   Body Electrical > Air Conditioner > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Ambient Temperature Sensor	Ambient temp. sensor (thermistor assembly)	-327.68 to 327.67°C	Actual ambient temperature displayed	Ambient temp. sensor (thermistor assembly) circuit malfunction

   Body Electrical > Air Conditioner > Data List 

   Tester Display
   Ambient Temperature Sensor

   OK

   The value of the display does not change frequently.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO OTHER DIAGNOSIS PROCEDURE (Ambient Temperature Display System). Refer to  Ambient Temperature Display System [08/2023 - ]  

Result: 

OK 

See step  4

1. Read the Data List according to the display on the GTS.

   Powertrain > Engine > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature	Min.: -40°C (-40°F) Max.: 140°C (284°F)	75 to 100°C (167 to 212°F): After warming up	This is the engine coolant temperature. HINT:  After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F). After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal. If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted. Check if the engine overheats if the value indicated is higher than 135°C (275°F).

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

   OK

   The value of the display does not change frequently.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO COOLING SYSTEM. Refer to  ON-VEHICLE INSPECTION [10/2022 - ] 

Result: 

OK 

See step  5

1. Install a manifold gauge set.

   Refer to ON-VEHICLE INSPECTION [10/2022 - ]

2. Prepare the vehicle according to the table below.
   MEASUREMENT CONDITION:
   
   

   Item	Condition
   Doors	Fully open
   A/C Switch	On
   Recirculation/fresh Control Switch	Recirculation
   Set Temperature	MAX COLD
   Blower Speed	HI
   Air Conditioning Air Inlet Temperature	25 to 35°C (77 to 95°F)

3. Compare the values displayed in the Data List and on the manifold gauge.

   Body Electrical > Air Conditioner > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Regulator Pressure Sensor	Air conditioning pressure sensor	-32768 to 32767 kPa(gauge) (-32.768 to 32.767 MPaG)	Actual refrigerant pressure displayed	Refrigerant line (gas leak etc.) Air conditioning pressure sensor circuit malfunction

   Body Electrical > Air Conditioner > Data List 

   Tester Display
   Regulator Pressure Sensor

   OK

   The values displayed in the Data List and on the manifold gauge match.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET. Refer to  ON-VEHICLE INSPECTION [10/2022 - ] 

Result: 

NG 

REPLACE AIR CONDITIONING PRESSURE SENSOR. Refer to  REMOVAL [08/2023 - ] 

1. Read the Data List according to the display on the GTS.

   Body Electrical > Air Conditioner > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Emission Gas HC/CO Sensor	Displays the exhaust gas (CO, HC) detection status of the smog ventilation sensor	0 to 5 V	Changes in accordance with the concentration of exhaust gas (CO, HC) around the smog ventilation sensor	Smog ventilation sensor circuit malfunction
   Emission Gas NOx Sensor	Displays the exhaust gas (NOx) detection status of the smog ventilation sensor	0 to 5 V	Changes in accordance with the concentration of exhaust gas (NOx) around the smog ventilation sensor	Smog ventilation sensor circuit malfunction

   Body Electrical > Air Conditioner > Data List 

   Tester Display
   Emission Gas HC/CO Sensor
   Emission Gas NOx Sensor

   OK

   Data List value changes in accordance with the concentration of exhaust gas around the smog ventilation sensor

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

OK 

See step  7

Refer to INSPECTION [10/2022 - ]

Result

Result: 

OK 

See step  3

Result: 

NG 

REPLACE SMOG VENTILATION SENSOR. Refer to  REMOVAL [10/2022 - ]