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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 65 (Air Conditioning System - Diagnostic Codes & Symptom Tests (Hybrid)) >> AIR CONDITIONING SYSTEM (for HV Model) >> Circuit Tests >> ECO Switch Circuit [04/2018 -] >> Procedure

ECO Switch Circuit [04/2018 -]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Air Conditioner > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      ECO Switch ECO switch assembly (electric parking brake switch assembly) OFF or ON OFF: ECO switch assembly (electric parking brake switch assembly) not pushed
      ON: ECO switch assembly (electric parking brake switch assembly) pushed and held      		 ECO switch assembly (electric parking brake switch assembly) circuit malfunction

      Body Electrical > Air Conditioner > Data List 

      Tester Display
      ECO Switch

      OK

      ECO switch assembly (electric parking brake switch assembly) condition displayed on the Techstream changes with the actual switch operation.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 -] 

    Result: 

    NG 

    See step  2

  2. INSPECT ECO SWITCH ASSEMBLY (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) 
    1. Remove the ECO switch assembly (electric parking brake switch assembly).

      Refer to REMOVAL [04/2018 -]

    2. Inspect the ECO switch assembly (electric parking brake switch assembly).

      Refer to INSPECTION [04/2018 -]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE ECO SWITCH ASSEMBLY (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY). Refer to  REMOVAL [04/2018 -] 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BODY GROUND) 
    1. Disconnect the G36 air conditioning amplifier assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G24-11 (ECU) - G36-20 (ECOS) Always Below 1 Ω
      G24-16 (GND1) - Body ground Always Below 1 Ω
      G24-11 (ECU) or G36-20 (ECOS) - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 -] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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