RM35X0E _58 Vehicle Interior _079316 HEATING / AIR CONDITIONING _0386651 AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System) J

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Automatic Air Conditioning System)  Recirculated/Fresh Air Modes Switch without User Input  


DESCRIPTION

If fresh/recirculation mode changes unintentionally and without permission, the following causes are possible.

Malfunction Status Factor
·

Fresh/recirculation mode changes without permission.

·

Fresh/recirculation mode light blinks.


·

Automatic function set to ON in the customize setting

·

Change in fresh air temperature

·

Refrigerant pressure drop

·

Pressure sensor circuit

·

High engine coolant temperature



PROCEDURE

1.CHECK CUSTOMIZE SETTING
a.

Use the following customize setting methods to check if the automatic fresh/recirculation mode is "ON". If the setting is on, select the setting to "OFF".

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System)>CUSTOMIZE PARAMETERS

OK:

Customize setting is "OFF".



Result:
Proceed to
OK
NG



OK

2.READ VALUE USING GTS (AMBIENT TEMP SENSOR)

NG

CHANGE CUSTOMIZE SETTING IS ON

2.READ VALUE USING GTS (AMBIENT TEMP SENSOR)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Data List.


e.

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 Temp Sensor Thermistor assembly Min.: -23.30°C (-9.94°F)
Max.: 65.95°C (150.71°F) 		Actual ambient temperature displayed Thermistor assembly system malfunction
·

When open circuit: -23.30°C (-9.94°F)

·

When short circuit: 65.95°C (150.71°F)


Body Electrical > Air Conditioner > Data List
Tester Display
Ambient Temp Sensor
50003 121 2
OK:

The value of the display does not change frequently.



Result:
Result Proceed to
OK (except 1GD-FTV (w/ Exhaust Gas Temperature Sensor for EGR)) A
OK (for 1GD-FTV (w/ Exhaust Gas Temperature Sensor for EGR)) B
NG C



A

3.READ VALUE USING GTS (COOLANT TEMPERATURE)

B

5.READ VALUE USING GTS (COOLANT TEMPERATURE)

C

GO TO AMBIENT TEMPERATURE DISPLAY SYSTEM

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System)>Ambient Temperature Display System


3.READ VALUE USING GTS (COOLANT TEMPERATURE)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Engine / Data List.


e.

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

Powertrain > Engine
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
50003 372 205
OK:

The value of the display does not change frequently.



Result:
Proceed to
OK
NG



OK

4.CHECK REFRIGERANT PRESSURE

NG

GO TO COOLING SYSTEM

for 7GR-FKS:Engine / Hybrid System>7GR-FKS (COOLING)>COOLING SYSTEM>ON-VEHICLE INSPECTION

for 1GD-FTV:Engine / Hybrid System>1GD-FTV (COOLING)>COOLING SYSTEM>ON-VEHICLE INSPECTION



4.CHECK REFRIGERANT PRESSURE
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Data List.


e.

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
Regulator Pressure Sensor Air conditioner pressure sensor Min.: -0.4566 MPaG (gauge)
Max.: 3.2943 MPaG (gauge) 		Actual refrigerant pressure displayed
·

Refrigerant line (gas leak, etc.)

·

Air conditioner pressure sensor system malfunction


Body Electrical > Air Conditioner > Data List
Tester Display
Regulator Pressure Sensor
50003 121 51

f.

Install a manifold gauge set.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>REFRIGERANT>ON-VEHICLE INSPECTION


g.

Read the manifold gauge pressure when the following conditions are met.

i.

Prepare the vehicle according to the table below.

Measurement Condition:
Item Condition
Vehicle Condition Engine running
Doors Fully closed (windows also fully closed)
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)

Standard pressure:
Low pressure side:

150 to 250 kPa (1.5 to 2.5 kgf/cm2, 22 to 36 psi)

High pressure side:

1370 to 1570 kPa (14 to 16 kgf/cm2, 199 to 228 psi)




h.

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

OK:

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



Result:
Proceed to
OK
NG



OK

GO TO ON-VEHICLE INSPECTION (CHECK REFRIGERANT PRESSURE USING GAUGE)

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System)>ON-VEHICLE INSPECTION


NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


5.READ VALUE USING GTS (COOLANT TEMPERATURE)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Engine and Transmission / Data List.


e.

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

Powertrain > Engine and Transmission > 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 and Transmission > Data List
Tester Display
Coolant Temperature
50003 456 237
OK:

The value of the display does not change frequently.



Result:
Proceed to
OK
NG



OK

4.CHECK REFRIGERANT PRESSURE

NG

GO TO COOLING SYSTEM

Click hereEngine / Hybrid System>1GD-FTV (COOLING)>COOLING SYSTEM>ON-VEHICLE INSPECTION