HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): Weak Blower Output; 2019 - 2024 MY RAV4 HV [11/2018

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM100000001FPHU
Model Year Start: 2019	Model: RAV4 HV	Prod Date Range: [11/2018 - ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): Weak Blower Output; 2019 - 2024 MY RAV4 HV [11/2018 - ]

Weak Blower Output

DESCRIPTION

If the blower airflow volume is weak regardless of the integration control and panel 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 Air conditioning amplifier assembly malfunction Blower with fan motor sub-assembly malfunction Clean air filter is clogging Evaporator or heater core fin 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.

GO TO 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.

If integration control and panel assembly (ECO switch) is malfunctioning, perform diagnosis on the ECO switch circuit.
Click here

3.	CHECK CLEAN AIR FILTER

(a) Visually check the clean air filter.

OK:

The clean air filter is not dirty or clogging.

REPLACE CLEAN AIR FILTER

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.

REINSTALL NO. 1 COOLER THERMISTOR

5.	CHECK ASPIRATOR

(a) Check the installation condition of the aspirator.

OK:

Aspirator is installed correctly.

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

REINSTALL ASPIRATOR