RM36D0EC _58 Vehicle Interior _083104 HEATING / AIR CONDITIONING _0402828 AIR CONDITIONING SYSTEM(for Gasoline Model) J

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model)  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
·

Air inlet mode changes between recirculation/fresh randomly

·

Recirculation/fresh switch indicator is blinking


·

Customize setting (for Automatic Air Conditioning System)

·

Change in ambient air temperature

·

Decrease in refrigerant pressure

·

Pressure sensor circuit malfunction

·

Engine coolant temperature (high)



PROCEDURE

1.CHECK CUSTOMIZE SETTING
a.

Use the following customize setting methods to check if the automatically 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 Gasoline Model)>CUSTOMIZE PARAMETERS

·

Check setting using GTS

·

Check setting by multi-display


OK:

Customize setting is "OFF".



Result:
Proceed to
OK
NG



OK

2.READ VALUE USING GTS

NG

CHANGE CUSTOMIZE SETTING IS ON

2.READ VALUE USING GTS
a.

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 temperature -327.68°C (-557.82°F) to 327.67°C (621.81°F) Ambient temperature of thermistor assembly -
Body Electrical > Air Conditioner > Data List
Tester Display
Ambient Temperature Sensor
50003 450 101
OK:

The value of the display does not change frequently.



Result:
Proceed to
OK
NG



OK

3.READ VALUE USING GTS

NG

GO TO AMBIENT TEMPERATURE DISPLAY SYSTEM

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Gasoline Model)>Ambient Temperature Display System


3.READ VALUE USING GTS
a.

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.: 215°C (419°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 FAN SYSTEM

for M20C-FKS:Engine / Hybrid System>M20C-FKS (COOLING)>COOLING FAN SYSTEM>ON-VEHICLE INSPECTION

for M20D-FKS:Engine / Hybrid System>M20D-FKS (COOLING)>COOLING FAN SYSTEM>ON-VEHICLE INSPECTION



4.CHECK REFRIGERANT PRESSURE
a.

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 Refrigerant gas pressure on high pressure side -32.768 MPaG to 32.767 MPaG Actual refrigerant pressure displayed
·

Refrigerant line (gas leak etc.)

·

Air conditioning pressure sensor circuit


Body Electrical > Air Conditioner > Data List
Tester Display
Regulator Pressure Sensor
50003 450 106

b.

Install a manifold gauge set.


c.

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 doors Fully open
Temperature setting MAX COLD
Blower speed HI
A/C switch On
Recirculation/fresh switch RECIRCULATION
Interior temperature 25 to 35°C (77 to 95°F)



d.

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 Gasoline Model)>ON-VEHICLE INSPECTION


NG

REPLACE AIR CONDITIONING PRESSURE SENSOR

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING PRESSURE SENSOR>REMOVAL