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SFI SYSTEM Fuel Injector Circuit

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DTC Code DTC Name
  Fuel Injector Circuit
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DESCRIPTION

The fuel injector assemblies are located on the intake manifold. They inject fuel into the cylinders based on the signals from the ECM.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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PROCEDURE


  1. Click here

    CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)


    1. B001WIZE02

      Disconnect the fuel injector assembly connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Cylinder Tester Connection Switch Condition Specified Condition
      No. 1 C5-1 - Body ground Ignition switch ON 11 to 14 V
      No. 2 C16-1 - Body ground Ignition switch ON 11 to 14 V
      No. 3 C7-1 - Body ground Ignition switch ON 11 to 14 V
      No. 4 C14-1 - Body ground Ignition switch ON 11 to 14 V
      No. 5 C9-1 - Body ground Ignition switch ON 11 to 14 V
      No. 6 C12-1 - Body ground Ignition switch ON 11 to 14 V
      Table 1. Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel Injector Assembly)

    4. Turn the ignition switch off.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY (IG2) - FUEL INJECTOR ASSEMBLY)

  2. Click here

    INSPECT FUEL INJECTOR ASSEMBLY


    1. Inspect the fuel injector assembly (Click here).


  3. Click here

    CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)


    1. Disconnect the fuel injector assembly connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Table 2. for LHD
      Cylinder Tester Connection Condition Specified Condition
      No. 1 C5-2 - Body ground Always 10 kΩ or higher
      C5-2 - C45-86 (#10) Always Below 1 Ω
      No. 2 C16-2 - Body ground Always 10 kΩ or higher
      C16-2 - C45-109 (#20) Always Below 1 Ω
      No. 3 C7-2 - Body ground Always 10 kΩ or higher
      C7-2 - C45-85 (#30) Always Below 1 Ω
      No. 4 C14-2 - Body ground Always 10 kΩ or higher
      C14-2 - C45-108 (#40) Always Below 1 Ω
      No. 5 C9-2 - Body ground Always 10 kΩ or higher
      C9-2 - C45-84 (#50) Always Below 1 Ω
      No. 6 C12-2 - Body ground Always 10 kΩ or higher
      C12-2 - C45-107 (#60) Always Below 1 Ω
      Table 3. for RHD
      Cylinder Tester Connection Condition Specified Condition
      No. 1 C5-2 - Body ground Always 10 kΩ or higher
      C5-2 - C46-86 (#10) Always Below 1 Ω
      No. 2 C16-2 - Body ground Always 10 kΩ or higher
      C16-2 - C46-109 (#20) Always Below 1 Ω
      No. 3 C7-2 - Body ground Always 10 kΩ or higher
      C7-2 - C46-85 (#30) Always Below 1 Ω
      No. 4 C14-2 - Body ground Always 10 kΩ or higher
      C14-2 - C46-108 (#40) Always Below 1 Ω
      No. 5 C9-2 - Body ground Always 10 kΩ or higher
      C9-2 - C46-84 (#50) Always Below 1 Ω
      No. 6 C12-2 - Body ground Always 10 kΩ or higher
      C12-2 - C46-107 (#60) Always Below 1 Ω

    • OK

      REPLACE ECM (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR