LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2009 >> Highlander Base, 3.5 S, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FE) - System And Component Testing, Removal, Inspection And Installation >> Integration Relay >> Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Integration Relay: Inspection

  1. INSPECT ENGINE ROOM JUNCTION BLOCK ASSEMBLY 
    Fig 1: Engine Room Junction Block Assembly Circuit Diagram
    G05414095Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Inspect the EFI No. 1 fuse.
      1. Remove the EFI No. 1 fuse.
      2. Using an ohmmeter, measure the resistance of the fuse.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        EFI No. 1 fuse Always Below 1 Ω
    2. Inspect the A/F fuse.
      1. Remove the A/F fuse.
      2. Using an ohmmeter, measure the resistance of the fuse.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        A/F fuse Always Below 1 Ω
    3. Inspect EFI relay.
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        2E-12 - 2E-7 No battery voltage applied 10 kΩ or higher
        2E-12 - 2E-7 Battery voltage applied to terminals 2E-10 and 2E-9 Below 1 Ω
        NOTE: While using the battery for the inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.
        Fig 2: Identifying Engine Room Junction Block Assembly Connector Terminals (EFI Relay)
        G05415083Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Inspect the C/OPN relay.
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        2E-13 - 2E-7 No battery voltage applied 10 kΩ or higher
        2E-13 - 2E-7 Battery voltage applied to terminals 2E-8 and 2D-12 Below 1 Ω
        NOTE: While using the battery for the inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.
        Fig 3: Identifying Engine Room Junction Block Assembly Connector Terminals (C/OPN Relay)
        G05414097Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Inspect the A/F relay.
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Condition Specified Condition
        2A-4 - 2C-1 No battery voltage applied 10 kΩ or higher
        2A-4 - 2C-1 Battery voltage applied to terminals 2E-10 and 2E-7 Below 1 Ω
        NOTE: While using the battery for the inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.
        Fig 4: Identifying Engine Room Junction Block Assembly Connector Terminals (A/F Relay)
        G05414098Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals