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On-Vehicle Inspection [10/2015 - ]: Procedure

WARNING: This page is about a different car, the 2019 Lexus GS 300, 2018 Lexus GS 300, 2017 Lexus GS 200t, and 2016 Lexus GS 200t. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT NO. 1 INTEGRATION RELAY (EFI MAIN1) 
    1. Check the EFI MAIN1 fuse.
      1. Measure the resistance according to the value (s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        EFI MAIN1 fuse Always Below 1 Ω

        If the result is not as specified, replace the EFI MAIN1 fuse.

    2. Check the EFI NO. 2 fuse.
      1. Measure the resistance according to the value (s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        EFI NO. 2 fuse Always Below 1 Ω

        If the result is not as specified, replace the EFI NO. 2 fuse.

    3. Measure the resistance according to the value (s) in the table below.
      GTY683296Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      2D-1 - 2E-16 Battery voltage not applied to terminals 2E-6 and 2E-10 10 kΩ or higher
      Battery voltage applied to terminals 2E-6 and 2E-10 Below 1 Ω
      *a Component without harness connected
      (No. 1 Integration Relay)

      If the result is not as specified, replace the No. 1 integration relay.

  2. INSPECT NO. 1 INTEGRATION RELAY (INJ) 
    1. Check the EDU fuse.
      1. Measure the resistance according to the value (s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        EDU fuse Always Below 1 Ω

        If the result is not as specified, replace the EDU fuse.

    2. Measure the resistance according to the value (s) in the table below.
      GTY683296Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      2D-1 - 2F-11 Battery voltage not applied to terminals 2F-10 and 2E-19 10 kΩ or higher
      Battery voltage applied to terminals 2F-10 and 2E-19 Below 1 Ω
      *a Component without harness connected
      (No. 1 Integration Relay)

      If the result is not as specified, replace the No. 1 integration relay.

  3. INSPECT NO. 1 INTEGRATION RELAY (IG2) 
    1. Check the IG2 MAIN fuse.
      1. Measure the resistance according to the value (s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        IG2 MAIN fuse Always Below 1 Ω

        If the result is not as specified, replace the IG2 MAIN fuse.

    2. Measure the resistance according to the value (s) in the table below.
      GTY683296Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      2D-1 - 2F-2 Battery voltage not applied to terminals 2E-2 and 2E-10 10 kΩ or higher
      Battery voltage applied to terminals 2E-2 and 2E-10 Below 1 Ω
      *a Component without harness connected
      (No. 1 Integration Relay)

      If the result is not as specified, replace the No. 1 integration relay.

  4. INSPECT NO. 1 INTEGRATION RELAY (A/F) 
    1. Check the A/F fuse.
      1. Measure the resistance according to the value (s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        A/F fuse Always Below 1 Ω

        If the result is not as specified, replace the A/F fuse.

    2. Measure the resistance according to the value (s) in the table below.
      GTY683296Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      2D-1 - 2F-4 Battery voltage not applied to terminals 2E-16 and 2E-10 10 kΩ or higher
      Battery voltage applied to terminals 2E-16 and 2E-10 Below 1 Ω
      *a Component without harness connected
      (No. 1 Integration Relay)

      If the result is not as specified, replace the No. 1 integration relay.

  5. INSPECT NO. 3 EFI MAIN RELAY (EFI MAIN 3) 
    1. Measure the resistance according to the value (s) in the table below.
      GTY373106Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 - 5 Battery voltage not applied between terminals 1 and 2 Below 1 Ω
      Battery voltage applied between terminals 1 and 2 10 kΩ or higher

      If the result is not as specified, replace the No. 3 EFI main relay.

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