METER / GAUGE SYSTEM Fuel Lid Opener System Operation Message Display Malfunction

DESCRIPTION

The combination meter assembly (meter circuit plate) and ECM are connected via direct line. The combination meter assembly displays fuel lid opener system operation messages according to the fuel lid signals received from the ECM.

WIRING DIAGRAM

B006ITOE01
*1 LSTM
*2 Combination Meter Assembly (Meter Circuit Plate)

CAUTION / NOTICE / HINT

Note


  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

  • The following troubleshooting procedure is based on the assumption that the SFI system and fuel lid opener system are normal. Confirm that the SFI system and fuel lid opener system are not malfunctioning before performing the following procedure.

    SFI system (w/ Canister Pump Module): Click here

    SFI system (w/o Canister Pump Module): Click here

    Fuel lid opener system: Click here

PROCEDURE


  1. INSPECT COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE) (OUTPUT VOLTAGE)

    B006H9LC01
    *a

    Front view of wire harness connector

    (to ECM)

    1. Disconnect the A31 ECM connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A31-24 (LSTM) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE)) Click here

    OK

  2. INSPECT COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE) (INPUT WAVEFORM)

    B006IZDC25
    *a

    Component with harness connected

    (Combination Meter Assembly (Meter Circuit Plate))

    1. Check the input waveform.


      1. Connect the A31 ECM connector.

      2. Remove the combination meter assembly (meter circuit plate) with the connector(s) still connected.

      3. Connect an oscilloscope to terminal I6-37 (LST1) and body ground.

      4. Operate the fuel lid opener switch.

      5. Check the signal waveform according to the condition(s) in the table below.


        • B006I0MN01

          Waveform 1:

          Item Condition
          Tester Connection I6-37 (LST1) - Body ground
          Tool setting 5 V/DIV., 20 ms./DIV.
          Condition "Please Wait Now Opening" displayed on multi-information display

          Tech Tips

          This waveform is output when the internal pressure of the fuel tank is higher than the ambient pressure when the fuel lid opener switch is operated.

        • B006HMSN01

          Waveform 2:

          Item Condition
          Tester Connection I6-37 (LST1) - Body ground
          Tool setting 5 V/DIV., 20 ms./DIV.
          Condition "Refuel Ready" displayed on multi-information display
        • B006IKXN01

          Waveform 3:

          Item Condition
          Tester Connection I6-37 (LST1) - Body ground
          Tool setting 5 V/DIV., 20 ms./DIV.
          Condition "Close Fuel Lid" displayed on multi-information display

          Tech Tips

          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.

        OK
        All of the waveforms are output normally.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE) Click here

    NG

    REPLACE ECM Click here

  3. CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE))


    1. Disconnect the I6 combination meter assembly (meter circuit plate) connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A31-24 (LSTM) - I6-37 (LST1) Always Below 1 Ω
      A31-24 (LSTM) or I6-37 (LST1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR