Integration Relay Inspection

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Uz-Fe Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190

  1. INSPECT INTEGRATION RELAY

Integration Relay -- Inspection



1. INSPECT INTEGRATION RELAY



Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System.Integration Relay Inspection



    Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System.Integration Relay Inspection

  1. Measure the resistance of the C/OPN relay.

    1. Connect the positive (+) battery lead to terminal 2A-8 and negative (-) lead to terminal 2B-3. Using an ohmmeter, check the resistance between the terminals when battery voltage is applied between the terminals.

      Standard resistance:
      Tester Connection
      		Specified Condition
      2C-1 - 2B-7
      		Below 1 Ω
      2C-1 - 2B-8
      		10 kΩ or higher

    2. Connect the positive (+) battery lead to terminal 2A-8 and 2C-1 and the negative (-) lead to terminal 2B-3 and 2B-7. Using an ohmmeter, check the resistance between terminals 2C-1 and 2B-8 when battery voltage is applied between the terminals.

      Standard resistance:
      Tester Connection
      		Specified Condition
      2C-1 - 2B-8
      		Below 1 Ω
      (when battery voltage is applied between 2A-8 and 2B-3, and 2C-1 and 2B-7)
      If the resistance is not as specified, replace the integration relay.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System.Integration Relay Inspection

  1. Measure the resistance of the EFI MAIN relay.

    1. Disconnect the EFI fuse. Using an ohmmeter, measure the resistance between the terminals.

      Standard resistance:
      Tester Connection
      		Specified Condition
      2A-6 - 2A-7
      		Below 1 Ω
      EFI fuse terminal 2 - 2A-8
      		10 kΩ or higher

    2. Connect the positive (+) battery lead to terminal 2A-6 and negative (-) lead to terminal 2A-7. Using an ohmmeter, check the resistance between the EFI fuse terminal 2 and terminal 2A-8 when battery voltage is applied between the terminals.

      Standard resistance:
      Tester Connection
      		Specified Condition
      EFI fuse terminal 2 - terminal 2A-8
      		Below 1 Ω
      (when battery voltage is applied between 2A-6 and 2A-7)
      If the resistance is not as specified, replace the integration relay.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System.Integration Relay Inspection

  1. Measure the resistance of the EFI 2 relay.

    1. Measure the resistance between the terminals.

      Standard resistance:
      Tester Connection
      		Specified Condition
      2B-3 - 2A-8
      		Below 1 Ω
      2B-7 - 2C-1
      		10 kΩ or higher

    2. Connect the positive (+) battery lead to terminal 2A-8 and negative (-) lead to terminal 2B-3. Using an ohmmeter, measure the resistance between terminals 2B-7 and 2C-1 when battery voltage is applied between the terminals.

      Standard resistance:
      Tester Connection
      		Specified Condition
      2B-7 - 2C-1
      		Below 1 Ω
      (when battery voltage is applied between 2B-3 and 2A-8)
      If the resistance is not as specified, replace the integration relay.