Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000025R1X
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

PROBLEM SYMPTOMS TABLE

NOTICE:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.

VEHICLE CHECK ITEMS

HINT:

  • You can reduce the number of systems to check by using the results of the following operation check.
  • Perform the following checks based on Customer Feedback and the vehicle condition.
  • The customer's opinion may not be consistent with the actual problem (eg: the cooling performance of the air conditioner is bad → actually, the wind volume is weak). It is important to check the problem symptoms accurately and judge correctly based on various sources of information.
  • Judgment as to whether the air conditioner panel is normal or abnormal can be judged by checking if the indicator illuminates or turns off when the switch is operated.
  • During servo motor initialization, the AUTO indicator light comes on, and then goes off when initialization has finished.
  • If the performance of the air conditioner is poor or there is a foul odor, check for clogging in the clean air filter.

Malfunction Operation/Function:

Common Function of Cool and Heater Function

Only Cool Air Function

Only Heater Function

Suspected Area

A/C Switch Operation

Blower Operation

Recirculation/Fresh Function

Air Outlet Changing Function

x

o

o

o

x

x

Go to "Problem Symptoms Table: Air Conditioning Control"

o

o

o

o

x

o

Go to "Problem Symptoms Table: Cooling Function"

o

o

o

o

o

x

Go to "Problem Symptoms Table: Heater Function"

o

x

o

o

x

x

Go to "Problem Symptoms Table: Blower Control"

o

o

x

o

x

x

Go to "Problem Symptoms Table: Air Inlet Control"

o

o

o

x

x

x

Go to "Problem Symptoms Table: Air Outlet Control"

x

x

x

x

x

x

Air Conditioning Amplifier Assembly or Air Conditioning Assembly is Defective

AIR CONDITIONING CONTROL

Symptom

Suspected Area

Link

Air conditioning system cannot be operated using air conditioning control assembly

  • (With the exception of the switch indicators, no inputs are reflected when other switches operated)
  • Air conditioning amplifier assembly
  • Air conditioning control assembly
  • Harness or connector

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Operation not Accepted Even If Air Conditioning Switch is Operated

Air conditioning system cannot be operated using air conditioning control assembly

  • (Air conditioning system display operates)

Air conditioning control assembly

2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING PANEL: REMOVAL

Air conditioning system cannot be operated using air conditioning control assembly immediately after starting the engine

  • (Air conditioning system display operates)
  • (Only AUTO indicator illuminates)
  • (A/C switch indicator does not illuminate)

Refer to "INITIALIZATION"

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): INITIALIZATION

A/C switch indicator does not illuminate

  • Air conditioning amplifier assembly
  • Air conditioning control assembly
  • A/C switch
  • A/C switch indicator
  • Servo motor
  • Damper and damper link
  • Refrigerant pressure
  • Ambient temperature

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): A/C Switch Indicator does not Turn On

COOLING FUNCTION

Symptom

Suspected Area

Link

No cool air comes out

  • (Blower control is normal)
  • Compressor assembly with pulley
  • Refrigerant pressure
  • Refrigerant volume
  • Cooler condenser assembly
  • Cooling fan system
  • Damper and damper link
  • No. 1 cooler thermistor
  • High inlet air temperature

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): No Cool Air Comes Out

  • Cooling effectiveness is poor
  • Cooling response is slow
  • ECO switch assembly (air conditioning control assembly)
  • Compressor assembly with pulley
  • Refrigerant volume
  • Cooler condenser assembly
  • Cooling fan system
  • Damper and damper link
  • Automatic light control sensor
  • High inlet air temperature
  • Harness or connector

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Cooling is Poor

HEATER FUNCTION

Symptom

Suspected Area

Link

  • No warm air comes out

    (Blower control is normal)

  • Outlet air temperature does not increase

    (Blower control is normal)

  • Engine coolant temperature
  • No. 1 air conditioning radiator damper servo sub-assembly
  • Damper and damper link
  • Warm-up control
  • Blockage in heater radiator unit sub-assembly
  • Heater radiator unit sub-assembly
  • Flow shutting valve*

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): No Warm Air Comes Out

  • *: w/ Flow Shutting Valve

BLOWER CONTROL

Symptom

Suspected Area

Link

Blower motor does not operate at all

  • (Air does not blow from registers)
  • Air conditioning amplifier assembly
  • Blower motor with fan sub-assembly
  • Warm-up control
  • Engine coolant temperature sensor
  • Harness or connector

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Blower Motor does not Operate

Airflow volume cannot be changed

  • Air conditioning amplifier assembly
  • Blower motor with fan sub-assembly
  • Harness or connector

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Blower Motor Circuit

  • Airflow volume is constantly low
  • Airflow volume sometimes becomes low
  • Blower motor with fan sub-assembly
  • ECO switch assembly (air conditioning control assembly)
  • Clean air filter
  • No. 1 evaporator sub-assembly or heater radiator unit sub-assembly fins
  • No. 1 cooler thermistor
  • Aspirator

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Weak Blower Output

AIR INLET CONTROL

Symptom

Suspected Area

Link

  • Air inlet mode changes between recirculation/fresh randomly
  • Recirculation/fresh switch indicator is blinking
  • Customize setting
  • Ambient temperature
  • Refrigerant pressure
  • Air conditioner pressure sensor circuit
  • Engine coolant temperature

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Recirculated/Fresh Air Modes Switch without User Input

  • Air inlet mode cannot be changed between recirculation/fresh
  • Air inlet mode does not change between recirculation/fresh automatically
  • No. 1 blower damper servo sub-assembly
  • Damper link
  • Air inlet damper mechanically locked
  • Air conditioner unit assembly
  • Engine coolant temperature

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Recirculated/Fresh Air Modes do not Switch

AIR OUTLET CONTROL

Symptom

Suspected Area

Link

Air outlet mode cannot be changed

  • (Air outlet display changes)
  • No. 1 air conditioning radiator damper servo sub-assembly
  • Damper link
  • Air conditioner unit assembly

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Air Vent cannot be Switched

Air outlet mode cannot be changed

  • (Air outlet display does not change)

Air conditioning control assembly

2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING PANEL: REMOVAL

DEFROSTER CONTROL

Symptom

Suspected Area

Link

Windshield frequently fogs up

  • Compressor assembly with pulley
  • Refrigerant volume
  • Cooler expansion valve
  • No. 1 air conditioning radiator damper servo sub-assembly
  • Damper and damper link

2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): Front Window Fogging