Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001CNZQ
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 09/2022]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): HOW TO PROCEED WITH TROUBLESHOOTING; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the air conditioning system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
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2.

CUSTOMER PROBLEM ANALYSIS

HINT:

  • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
  • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
  • The following 5 items are important points for problem analysis:

    What

    Vehicle model, system name

    When

    Date, time, occurrence frequency

    Where

    Road conditions

    Under what conditions?

    Driving conditions, weather conditions

    How did it happen?

    Problem symptoms
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3.

INSPECT BATTERY VOLTAGE

(a) Inspect the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

NEXT

4.

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for CAN communication system DTCs.

Click here 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2020 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2021 - 2022 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM

Result

Proceed to

CAN communication system DTCs are not output

A

CAN communication system DTCs are output

B
B

GO TO CAN COMMUNICATION SYSTEM

A

5.

CHECK FOR DTC*

(a) Check for DTCs and note any codes that are output.

Body Electrical > Air Conditioner > Trouble Codes

(b) Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs

(c) Recheck for DTCs. Based on the DTCs output above, try to force output of the air conditioning system DTC by simulating the operation indicated by the DTC.

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO DIAGNOSTIC TROUBLE CODE CHART 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): DIAGNOSTIC TROUBLE CODE CHART 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): DIAGNOSTIC TROUBLE CODE CHART

A

6.

CHECK AIR CONDITIONING CONTROL ASSEMBLY

(a) Operate each switch on the air conditioning control assembly and check that the switches of the air conditioning system operate normally.

NG

GO TO PROBLEM SYMPTOMS TABLE 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE

OK

7.

CHECK BLOWER CONTROL

(a) Operate the blower switch on the air conditioning control assembly and check that the blower control operates normally.

NG

GO TO PROBLEM SYMPTOMS TABLE 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE

OK

8.

CHECK AIR INLET CONTROL

(a) Operate the recirculation/fresh switch on the air conditioning control assembly and check that the air inlet control operates normally.

NG

GO TO PROBLEM SYMPTOMS TABLE 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE

OK

9.

CHECK AIR OUTLET CONTROL

(a) Operate the air outlet mode switch on the air conditioning control assembly and check that the air outlet control operates normally.

NG

GO TO PROBLEM SYMPTOMS TABLE 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE

OK

10.

CHECK COOLING FUNCTION

(a) Operate the temperature adjustment switches on the air conditioning control assembly and check that cool air is blown from the registers.

NG

GO TO PROBLEM SYMPTOMS TABLE 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE

OK

11.

CHECK HEATER FUNCTION

(a) Operate the temperature adjustment switches on the air conditioning control assembly and check that warm air is blown from the air registers.

NG

GO TO PROBLEM SYMPTOMS TABLE 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): PROBLEM SYMPTOMS TABLE

OK

12.

USE SIMULATION METHOD TO CHECK

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

NEXT

13.

CONFIRMATION TEST
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END