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)  Weak Blower Output  


DESCRIPTION

If the blower airflow volume is weak regardless of the air conditioning control assembly being normal, the following causes are possible.

Malfunction Status Factor
·

Blower airflow volume is continuously weak.

·

Blower airflow volume is sometimes weak.


·

Communication malfunction between air conditioning amplifier assembly and blower with fan motor sub-assembly

·

Blower with fan motor sub-assembly malfunction

·

Air conditioning amplifier assembly malfunction

·

Evaporator or heater core fin clogging

·

Clean air filter clogging

·

ECO drive mode function (air flow volume is restricted due to ECO drive mode being selected)

·

Aspirator dropped



PROCEDURE

1.CHECK BLOWER FAN OPERATION
a.

Prepare the vehicle according to the table below in manual mode.

Blower Switch Condition
LO → HI
·

Temperature setting: Max COLD

·

Mode switch: FACE

·

A/C switch: Off



OK:

Airflow volume is changed.



Result:
Proceed to
OK
NG



OK

2.CHECK ECO DRIVE MODE OPERATION

NG

GO TO BLOWER MOTOR CIRCUIT

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System)>Blower Motor Circuit


2.CHECK ECO DRIVE MODE OPERATION
a.

Confirm setup of the ECO drive mode and turn it off if it is on.

HINT:

When ECO drive mode is on, the air conditioning amplifier assembly ensures a minimum level of air conditioning control based on certain conditions, thereby contributing to improved fuel efficiency. Accordingly, explain to customers that the air volume will be weaker in these situations.

Control Control Summary
Airflow Control Automatically switches the air inlet port to the internal air circulation mode when the outside air temperature is equal to or higher than a predetermined temperature and reduces the power consumption.
Air Inlet Control Sets the blower level in AUTO mode lower than normal, and suppresses the power consumption.



Result:
Proceed to
NEXT



NEXT

3.CHECK CLEAN AIR FILTER
3.CHECK CLEAN AIR FILTER
a.

Visually check the clean air filter.

OK:

The clean air filter is not dirty or clogging.



Result:
Proceed to
OK
NG



OK

4.CHECK NO. 1 COOLER THERMISTOR

NG

REPLACE CLEAN AIR FILTER

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER UNIT>DISASSEMBLY


4.CHECK NO. 1 COOLER THERMISTOR
a.

Check the installation condition of the No. 1 cooler thermistor.

OK:

No. 1 cooler thermistor is installed correctly.



Result:
Proceed to
OK
NG



OK

5.CHECK ASPIRATOR

NG

REINSTALL NO. 1 COOLER THERMISTOR

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT EVAPORATOR TEMPERATURE SENSOR>INSTALLATION


5.CHECK ASPIRATOR
a.

Check the installation condition of the aspirator.

OK:

Aspirator is installed correctly.



Result:
Proceed to
OK
NG



OK

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY OR NO. 1 COOLER EVAPORATOR (HEATER RADIATOR UNIT SUB-ASSEMBLY OR NO. 1 COOLER EVAPORATOR WAS CLOGGING)

NG

REINSTALL ASPIRATOR

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT AIR CONDITIONING UNIT (for LHD)>REASSEMBLY