RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0598792 AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE)) J

HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE)) Weak Blower Output

DESCRIPTION

If the airflow from the registers is weak regardless of the blower speed setting displayed on the air conditioning control assembly, the following factors may be the cause.

Symptom	Factor
· Airflow volume is constantly low · Airflow volume sometimes becomes low	· ECO mode control of air conditioning system is enabled · Blower motor with fan sub-assembly malfunction · Clogged clean air filter · Clogged No. 1 cooler evaporator sub-assembly or heater radiator unit sub-assembly fins · Evaporator temp. sensor (No. 1 cooler thermistor) not connected properly · Aspirator pipe not connected properly

PROCEDURE

1.CHECK AIR CONDITIONING SYSTEM

Operate the blower switch with the following conditions met and check that the airflow volume changes.

Blower Speed	Condition
LO → HI	· Temperature setting: MAX COLD · Air outlet mode: FACE · A/C switch: Off

OK:: Airflow volume increases.

Result:

Proceed to
OK
NG

2.CHECK ECO MODE SETTING

GO TO OTHER DIAGNOSIS PROCEDURE (Blower Motor Circuit)

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HV Model (8ZR-FXE))>Blower Motor Circuit202304,202406,_58,_080733,_0598792,RM100000002B616,202406,999999,_58,_080733,_0598792,RM100000002N5ME,

2.CHECK ECO MODE SETTING

Confirm that ECO HEAT/COOL switch (air conditioning control assembly) is set to off.

Confirm that ECO drive mode is set to off.

HINT:

When the ECO drive mode is set to ON, the air conditioning amplifier assembly performs minimal air conditioning control in order to promote the improvement of fuel economy. Ensure that the customer understands that the airflow volume will be decreased compared to normal operation.

Control	Control Summary
Air Volume Control	Sets the blower level to less.

Result:

Proceed to
NEXT

3.CHECK CLEAN AIR FILTER

Visually check the clean air filter.

OK:: The clean air filter is not dirty or clogging.

Result:

Proceed to
OK
NG

4.CHECK EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR)

REPLACE CLEAN AIR FILTER

Click hereGeneral>MAINTENANCE>AIR CONDITIONING FILTER>REMOVAL202304,999999,_V1,_080956,_0393747,RM100000002B1PE,

4.CHECK EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR)

Check the installation condition of the evaporator temp. sensor (No. 1 cooler thermistor).

OK:: Evaporator temp. sensor (No. 1 cooler thermistor) is installed correctly.

Result:

Proceed to
OK
NG

5.CHECK ASPIRATOR PIPE

REINSTALL EVAPORATOR TEMP. SENSOR (NO. 1 COOLER THERMISTOR)

Click hereVehicle Interior>HEATING / AIR CONDITIONING>FRONT EVAPORATOR TEMPERATURE SENSOR (for HV Model)>INSTALLATION202304,202307,_58,_080733,_0393739,RM100000002B1IT,202307,999999,_58,_080733,_0393739,RM100000002DD4S,

5.CHECK ASPIRATOR PIPE

Check the installation condition of the aspirator pipe.

OK:: The aspirator pipe is installed correctly.

Result:

Proceed to
OK
NG

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY OR NO. 1 COOLER EVAPORATOR SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for HV Model)>REMOVAL202304,202307,_58,_080733,_0393728,RM100000002B27F,202307,999999,_58,_080733,_0393728,RM100000002CH88,

INSTALL ASPIRATOR PIPE

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for HV Model)>REASSEMBLY202304,202307,_58,_080733,_0393728,RM100000002B1HV,202307,999999,_58,_080733,_0393728,RM100000002CH8F,