Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001R3ZD
Model Year Start: 2021 Model: Camry Prod Date Range: [10/2020 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): Weak Blower Output; 2021 - 2024 MY Camry [10/2020 -        ]

Weak Blower Output

DESCRIPTION

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

Symptom

Factor
  • Airflow volume is constantly low
  • Airflow volume sometimes becomes low
  • Communication malfunction between air conditioning amplifier assembly and blower motor with fan sub-assembly
  • Air conditioning amplifier assembly malfunction
  • Blower motor with fan sub-assembly malfunction
  • Clogged clean air filter
  • Clogged No. 1 evaporator sub-assembly or heater radiator unit sub-assembly fins
  • ECO mode control of air conditioning system is enabled
  • Aspirator not connected properly

PROCEDURE

1.

CHECK AIR CONDITIONING SYSTEM

(a) 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.

NG

GO TO OTHER DIAGNOSIS PROCEDURE (Blower Motor Circuit)

OK

2.

CHECK ECO MODE CONTROL OPERATION

(a) Check that ECO mode control is disabled (ECO mode indicator is not illuminated).

(b) Operate the ECO switch assembly (electric parking brake switch assembly) and check that the ECO mode indicator illuminates and the blower speed is reduced.

HINT:

  • When ECO mode control is operating, the air conditioning amplifier assembly controls the air conditioning system to enhance fuel efficiency. Therefore, explain to the customer that, when ECO mode control is operating, the blower speed will be reduced.

    Control

    Outline

    Blower Control

    When the air conditioning system is in AUTO mode, the blower speed will be reduced to a certain speed. Additionally, if warm-up control is operating, the blower speed will be further reduced.

    Air Inlet Control

    If the ambient temperature is a certain value or more, the air inlet mode will be changed to recirculation mode.
  • In some situations, ECO mode control may not operate even though it is enabled.

(c) Operate the ECO switch assembly (electric parking brake switch assembly) and check that the ECO mode indicator turns off and the blower speed returns to normal.

OK:

When the ECO switch assembly (electric parking brake switch assembly) is operated, ECO mode control is enabled/disabled and the blower speed is controlled.

NG

GO TO ECO Switch Circuit

OK

3.

CHECK CLEAN AIR FILTER

(a) Visually check the clean air filter.

Click here 2018 - 2024 MY Camry [03/2017 -        ]; MAINTENANCE: AIR CONDITIONING FILTER: REMOVAL

OK:

The clean air filter is not dirty or clogged.

NG

REPLACE CLEAN AIR FILTER

OK

4.

CHECK NO. 1 COOLER THERMISTOR

(a) Check the installation condition of the No. 1 cooler thermistor.

OK:

The No. 1 cooler thermistor is installed correctly.

NG

INSTALL NO. 1 COOLER THERMISTOR CORRECTLY

OK

5.

CHECK ASPIRATOR

(a) Check the installation condition of the aspirator.

OK:

The aspirator is installed correctly.

OK

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

NG

INSTALL ASPIRATOR CORRECTLY