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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 60 (Fuel Lid Opener System - Diagnostics & Symptom Tests) >> FUEL LID OPENER SYSTEM (except Gasoline Model) >> Fuel Lid Opener does not Operate [09/2023 - 12/2023] >> Procedure

Fuel Lid Opener does not Operate [09/2023 - 12/2023]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+ and 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTC 
    1. Using the GTS, check that DTCs related to the close tank valve assembly or vapor pressure sensor are not output.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      DTCs related to the close tank valve assembly or vapor pressure sensor are not output A
      DTCs related to the close tank valve assembly or vapor pressure sensor are output B

    Result: 

    B 

    GO TO RELEVANT DIAGNOSTIC TROUBLE CODE PROCEDURE. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2023 - ] 

    Result: 

    A 

    See step  2

  2. PERFORM ACTIVE TEST USING GTS 
    1. Perform the Active Test according to the display on the GTS.

      Powertrain > Engine > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Activate the Fuel Filler Opener Activate fuel lid with motor lock assembly OFF or ON -

      Powertrain > Engine > Active Test 

      Tester Display
      Activate the Fuel Filler Opener

      OK

      The fuel lid with motor lock assembly operates normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  11

    Result: 

    OK 

    See step  3

  3. INSPECT FUEL LID OPENER SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY) 

    Refer to INSPECTION [09/2023 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FUEL LID OPENER SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY). Refer to  REMOVAL [09/2023 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (FUEL LID OPENER SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY) - ECM AND BODY GROUND) 
    1. Disconnect the D23 fuel lid opener switch (integration control and panel assembly) connector.
    2. Disconnect the B77 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D23-3 (B) - B77-51 (FUEL) Always Below 1 Ω
      D23-6 (L) - Body ground Always Below 1 Ω
      D23-3 (B) or B77-51 (FUEL) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. INSPECT FUEL LID WITH MOTOR LOCK ASSEMBLY (FUEL LID COURTESY SWITCH) 

    Refer to INSPECTION [09/2023 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FUEL LID WITH MOTOR LOCK ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (FUEL LID WITH MOTOR LOCK ASSEMBLY - ECM AND BODY GROUND) 
    1. Disconnect the J10 fuel lid with motor lock assembly connector.
    2. Disconnect the B77 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J10-3 (B) - B77-23 (LIDO) Always Below 1 Ω
      J10-2 (E) - Body ground Always Below 1 Ω
      J10-3 (B) or B77-23 (LIDO) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK CLOSE TANK VALVE ASSEMBLY OR FUEL TANK VENT HOSE 
    1. Check the close tank valve assembly or fuel tank vent hose for clogging.

      Refer to ON-VEHICLE INSPECTION [09/2023 - ]

      OK

      The close tank valve assembly or fuel tank vent hose is not clogged.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REMOVE THE CLOGGING 

    Result: 

    OK 

    See step  8

  8. INSPECT CLOSE TANK VALVE ASSEMBLY 

    Refer to INSPECTION [09/2023 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE CLOSE TANK VALVE ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    OK 

    See step  9

  9. REPLACE VAPOR PRESSURE SENSOR 
    1. Replace the vapor pressure sensor with a new or known good one.

      Refer to REMOVAL [09/2023 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  10

  10. CHECK FUEL LID OPENER OPERATION 
    1. Check the fuel lid opener operation.

      Refer to OPERATION CHECK [09/2023 - ] 

      OK

      Fuel lid opener operates normally.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (VAPOR PRESSURE SENSOR WAS DEFECTIVE) 

    Result: 

    NG 

    REPLACE ECM. Refer to  REMOVAL [09/2023 - ] 

  11. INSPECT FUEL LID WITH MOTOR LOCK ASSEMBLY 

    Refer to INSPECTION [09/2023 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FUEL LID WITH MOTOR LOCK ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    OK 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (FUEL LID WITH MOTOR LOCK ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND) 
    1. Disconnect the J10 fuel lid with motor lock assembly connector.
    2. Disconnect the J48 power distribution box assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J10-1 (B) - J48-29 Always Below 1 Ω
      J10-2 (E) - Body ground Always Below 1 Ω
      J10-1 (B) or J48-29 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - ECM) 
    1. Disconnect the B58 power distribution box assembly connector.
    2. Disconnect the C27 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B58-16 - C27-15 (FREL) Always Below 1 Ω
      B58-16 or C27-15 (FREL) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  14

  14. CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - BATTERY) 
    1. Disconnect the B58, B57 and D62 power distribution box assembly connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      B57-1 - Body ground Ignition switch off 11 to 14 V
      B58-1 - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      D62-36 - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  15

  15. INSPECT POWER DISTRIBUTION BOX ASSEMBLY (FUEL OPN RELAY) 
    GTY1231352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the power distribution box assembly.

      Refer to REMOVAL [09/2023 - ]

    2. Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

      Refer to REMOVAL [09/2023 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      B57-1 - J48-29 Voltage applied between terminals B58-1 and B58-16 Below 1 Ω
      B57-1 - J48-29 Voltage not applied between terminals B58-1 and B58-16 10 kΩ or higher
      D62-36 - J48-29 Voltage not applied between terminals B58-1 and B58-16 Below 1 Ω
      D62-36 - J48-29 Voltage applied between terminals B58-1 and B58-16 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [09/2023 - ] 

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