SFI SYSTEM(w/ EGR System) Fuel Injector Circuit

DTC Code DTC Name
Fuel Injector Circuit

DESCRIPTION

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

WIRING DIAGRAM

A312551E06

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)

    A201049C87

    *a

    Front view of wire harness connector

    (to Fuel Injector Assembly)

    1. Disconnect the fuel injector assembly connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      B19-1 - Body ground

      Power switch on (IG)

      11 to 14 V

      B17-1 - Body ground

      Power switch on (IG)

      11 to 14 V

      W5-1 - Body ground

      Power switch on (IG)

      11 to 14 V

      W6-1 - Body ground

      Power switch on (IG)

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (IG2 RELAY - FUEL INJECTOR ASSEMBLY)Click here

    OK

  2. INSPECT FUEL INJECTOR ASSEMBLY

    1. Inspect the fuel injector assembly.

      Click here

      Tip:

      Perform "Inspection After Repair" after replacing the fuel injector assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FUEL INJECTOR ASSEMBLY

    Click here

    OK

  3. 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

      Tester Connection

      Condition

      Specified Condition

      B19-2 - B75-20 (#10)

      Always

      Below 1 Ω

      B17-2 - B75-17 (#20)

      Always

      Below 1 Ω

      W5-2 - B75-18 (#30)

      Always

      Below 1 Ω

      W6-2 - B75-19 (#40)

      Always

      Below 1 Ω

      B19-2 or B75-20 (#10) - Body ground and other terminals

      Always

      10 kΩ or higher

      B17-2 or B75-17 (#20) - Body ground and other terminals

      Always

      10 kΩ or higher

      W5-2 or B75-18 (#30) - Body ground and other terminals

      Always

      10 kΩ or higher

      W6-2 or B75-19 (#40) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. CHECK HARNESS AND CONNECTOR (IG2 RELAY - FUEL INJECTOR ASSEMBLY)

    1. Remove the IG2 relay from the engine room relay block and junction block assembly.

    2. Disconnect the fuel injector assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      5 (IG2 relay) - B19-1

      Always

      Below 1 Ω

      5 (IG2 relay) - B17-1

      Always

      Below 1 Ω

      5 (IG2 relay) - W5-1

      Always

      Below 1 Ω

      5 (IG2 relay) - W6-1

      Always

      Below 1 Ω

      5 (IG2 relay) or B19-1 - Body ground and other terminals

      Always

      10 kΩ or higher

      5 (IG2 relay) or B17-1 - Body ground and other terminals

      Always

      10 kΩ or higher

      5 (IG2 relay) or W5-1 - Body ground and other terminals

      Always

      10 kΩ or higher

      5 (IG2 relay) or W6-1 - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    GO TO ECM POWER SOURCE CIRCUIT

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR