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Integration Relay: Inspection

  1. INSPECT INTEGRATION RELAY 
    NOTE:
    • Some relays are built into the integration relay (unit: A). The integration relay cannot be disassembled. If there is a malfunction in the circuit of the integration relay, replace the integration relay.
    • The internal circuit of the integration relay is as shown in the illustration. Inspect the integration relay using the following procedures.
      Fig 1: Identifying Relay Inner Diagram
      G05316269Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance of the C/OPN relay.
      1. Using an ohmmeter, measure the resistance between terminal.

        Standard resistance 

        RESISTANCE SPECIFIED CONDITION

        Tester Connection Specified Condition
        2B-5 - 2B-8 10 kΩ or higher
        Fig 2: Identifying Integration Relay Backside
        G05316270Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Connect the battery's positive (+) lead to terminals 2B-5 and negative (-) lead to terminal 2B-7. Using an voltmeter, measure the resistance between terminal.

        Standard voltage 

        VOLTAGE SPECIFIED CONDITION

        Tester Connection Specified Condition
        2B-7 - 2B-8 10 - 14 V
    2. Measure the resistance of the EFI MAIN relay.
      1. Remove the EFI fuse. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance 

        RESISTANCE SPECIFIED CONDITION

        Tester Connection Specified Condition
        EFI fuse terminal 2 - 2A-8 10 kΩ or higher
      2. Connect the battery's positive (+) lead to terminal 2A-6 and negative (-) lead to terminal 2A-7. Using an ohmmeter, measure the resistance between terminal.

        Standard resistance 

        RESISTANCE SPECIFIED CONDITION

        Tester Connection Specified Condition
        EFI fuse terminal 2 - terminal 2A-8 Below 1 Ω
        Fig 3: Identifying Integration Relay - EFI Fuse
        G05316271Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance of the EFI NO. 2 relay.
      1. Remove the F/PMP fuse. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance 

        RESISTANCE SPECIFIED CONDITION

        Tester Connection Specified Condition
        F-PMP fuse terminal 2 - 2B-4 10 kΩ or higher
      2. Connect the battery's positive (+) lead to terminal 2A-8 and negative (-) lead to terminal 2B-3. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance 

        RESISTANCE SPECIFIED CONDITION

        Tester Connection Specified Condition
        F-PMP fuse terminal 2 - 2B-4 Below 1 Ω
        Fig 4: Identifying Integration Relay - F/PMP Fuse
        G05316272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Measure the resistance of the EFI INJ relay.
      Fig 5: Identifying Integration Relay - INJ Fuse
      G05316273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Remove the INJ fuse. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance 

        RESISTANCE SPECIFIED CONDITION

        Tester Connection Specified Condition
        INJ fuse terminal 2 - 2A-4 10 kΩ or higher
      2. Connect the battery's positive (+) lead to terminal 2A-2 and negative (-) lead to terminal 2A-3. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance 

        RESISTANCE SPECIFIED CONDITION

        Tester Connection Specified condition
        INJ fuse terminal 2 - terminal 2A-4 Below 1 Ω
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