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On-Vehicle Inspection

  1. INSPECT CIRCUIT OPENING RELAY (C/OPN) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying Terminals Of EFI NO. 2 Relay
      GTY144195Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

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

      If the result is not as specified, replace the relay.

  2. INSPECT INTEGRATION RELAY (IG2) 
    1. Measure the resistance of the IG2 MAIN fuse.
      1. Remove the IG2 MAIN fuse from the integration relay.
      2. 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.

      3. Install the IG2 MAIN fuse to the integration relay.
    2. Measure the resistance of the ignition relay No. 2 (IG2) circuit.
      Fig 2: Identifying Terminals Of Integration Relay
      GTY135077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        1C-1 - 1B-8 Battery voltage is not applied to terminals 1B-6 and 1B-7 10 kΩ or higher
        Battery voltage is applied to terminals 1B-6 and 1B-7 Below 1 Ω

        If the result is not as specified, replace the integration relay.

  3. INSPECT INTEGRATION RELAY (EFI) 
    1. Measure the resistance of the EFI MAIN fuse.
      1. Remove the EFI MAIN fuse from the integration relay.
      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

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

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

      3. Install the EFI MAIN fuse to the integration relay.
    2. Measure the resistance of the EFI relay circuit.
      Fig 3: Identifying Terminals Of Integration Relay
      GTY135077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        1C-1 - 1B-4 Battery voltage is not applied to terminals 1B-2 and 1B-3 10 kΩ or higher
        Battery voltage is applied to terminals 1B-2 and 1B-3 Below 1 Ω

        If the result is not as specified, replace the integration relay.

  4. INSPECT EFI NO. 2 RELAY 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 4: Identifying Terminals Of EFI NO. 2 Relay
      GTY144195Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

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

      If the result is not as specified, replace the relay.

  5. INSPECT INTEGRATION RELAY (A/F) 
    1. Measure the resistance of the A/F fuse.
      1. Remove the A/F fuse from the integration relay.
      2. 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.

      3. Install the A/F fuse to the integration relay.
    2. Measure the resistance of the A/F sensor heater relay circuit.
      Fig 5: Identifying Terminals Of Integration Relay
      GTY145409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        1C-1 - 1A-4 Battery voltage is not applied to terminals 1A-2 and 1A-3 10 kΩ or higher
        Battery voltage is applied to terminals 1 A-2 and 1A-3 Below 1 Ω

        If the result is not as specified, replace the integration relay.

  6. INSPECT MAIN BODY ECU (IG1 NO. 1) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 6: Identifying Terminals Of Main Body ECU
      GTY148695Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      2A-1 - 2B-17 Battery voltage is not applied to terminals 2B-5 and 2D-43 10 kΩ or higher
      Battery voltage is applied to terminals 2B-5 and 2D-43 Below 1 Ω

      If the result is not as specified, replace the main body ECU.

  7. INSPECT STARTER RELAY (ST)  . Refer to ON-VEHICLE INSPECTION - Step 1
  8. INSPECT STARTER CUT RELAY (ST CUT)  . Refer to ON-VEHICLE INSPECTION - Step 2
  9. INSPECT MAIN BODY ECU (ACC RELAY)  . Refer to ON-VEHICLE INSPECTION - Step 3
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