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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different car >> Section 353 (Meter / Gauge System (Except 12.3 Inch) Symptom Tests (2 Of 2) & Circuit Tests) >> METER / GAUGE SYSTEM (except 12.3 Inch Display) >> Fuel Lid Opener System Operation Message Display Malfunction [09/2022 - ] >> Procedure

Fuel Lid Opener System Operation Message Display Malfunction [09/2022 - ]: Procedure

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  1. INSPECT COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE) 
    GTY1112920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to ECM)
    1. Disconnect the A46 ECM connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A46-30 (LSTM) - Body ground Ignition switch off 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  3

    Result: 

    OK 

    See step  2

  2. INSPECT COMBINATION METER ASSEMBLY (INPUT WAVEFORM) 
    GTY1118380Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component with harness connected
    (Combination Meter Assembly)
    1. Connect the ECM connector.
    2. Operate the fuel lid opener switch.
    3. Check the signal waveform according to the condition(s) in the table below.
      NOTE:

      Perform the inspection from the back of the connector with the connector connected.

      1. Waveform 1:
        Item Condition
        Tester Connection I4-28 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition The following message (interrupt display) being displayed on the multi-information display:
        1. "Ready to Refuel"
        GTY704448Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2:
        Item Condition
        Tester Connection I4-28 (LST1) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition The following message (interrupt display) being displayed on the multi-information display:
        1. "Close Fuel Lid"
        GTY734467Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        This waveform is output when the fuel lid opener switch is operated if the fuel lid is open and any of the following conditions are met:

        • The vehicle has been driven for 1 km (0.6 mile) or more at a speed of 50 km/h (31 mph) or more.
        • 30 minutes or more have elapsed since the fuel lid opener switch was operated.

      Result

      Result Proceed to
      All of the waveforms are output normally A
      A waveform is not output normally B

    Result: 

    A 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [09/2022 - 11/2022] , or refer to REMOVAL [11/2022 - 09/2024] , or refer to REMOVAL [09/2024 - ]

    Result: 

    B 

    REPLACE ECM 

    Refer to REMOVAL [09/2022 - 11/2022] , or refer to REMOVAL [11/2022 - ]

  3. CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY) 
    1. Disconnect the I4 combination meter assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A46-30 (LSTM) - I4-28 (LST1) Always Below 1 Ω
      A46-30 (LSTM) or I4-28 (LST1) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [09/2022 - 11/2022] , or refer to REMOVAL [11/2022 - 09/2024] , or refer to REMOVAL [09/2024 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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