SFI SYSTEM (w/ Secondary Air Injection System) Fuel Injector Circuit

DESCRIPTION

The fuel injectors are located on the cylinder head. They inject fuel into the cylinders based on the signals from the ECM.

WIRING DIAGRAM

A01J3ZIE01

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. INSPECT FUEL INJECTOR ASSEMBLY (POWER SOURCE)

    A01J7ITE25
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Fuel Injector Assembly)

    1. Disconnect the fuel injector 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 F4-1 - Body ground Ignition switch ON 11 to 14 V
      No. 2 F5-1 - Body ground Ignition switch ON 11 to 14 V
      No. 3 F6-1 - Body ground Ignition switch ON 11 to 14 V
      No. 4 F7-1 - Body ground Ignition switch ON 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - IGNITION SWITCH) Click here

    OK

  2. INSPECT FUEL INJECTOR ASSEMBLY


    1. Inspect the fuel injector assembly Click here.


    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - ECM)


    1. Disconnect the fuel injector connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Cylinder Tester Connection Condition Specified Condition
      No. 1 F4-2 - Body ground Always 10 kΩ or higher
      F4-2 - E10-6 (#10) Always Below 1 Ω
      No. 2 F5-2 - Body ground Always 10 kΩ or higher
      F5-2 - E10-5 (#20) Always Below 1 Ω
      No. 3 F6-2 - Body ground Always 10 kΩ or higher
      F6-2 - E10-2 (#30) Always Below 1 Ω
      No. 4 F7-2 - Body ground Always 10 kΩ or higher
      F7-2 - E10-1 (#40) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here

  4. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - IGNITION SWITCH)


    1. Disconnect the fuel injector connector.

    2. Disconnect the ignition switch connector.

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

      Standard Resistance
      Cylinder Tester Connection Condition Specified Condition
      No. 1 F4-1 - Body ground Always 10 kΩ or higher
      F4-1 - I8-6 (IG2) Always Below 1 Ω
      No. 2 F5-1 - Body ground Always 10 kΩ or higher
      F5-1 - I8-6 (IG2) Always Below 1 Ω
      No. 3 F6-1 - Body ground Always 10 kΩ or higher
      F6-1 - I8-6 (IG2) Always Below 1 Ω
      No. 4 F7-1 - Body ground Always 10 kΩ or higher
      F7-1 - I8-6 (IG2) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch assembly Click here.


    NG

    REPLACE IGNITION SWITCH ASSEMBLY Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)