SFI SYSTEM(w/ EGR System) Fuel Injector Circuit

DTC Code DTC Name
Fuel Injector Circuit

DESCRIPTION

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

WIRING DIAGRAM

A231457E06

CAUTION / NOTICE / HINT

Note:

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

PROCEDURE

  1. INSPECT FUEL INJECTOR ASSEMBLY (POWER SOURCE)

    A166988C03

    *a

    Front view of wire harness connector

    (to Fuel Injector Assembly)

    1. Disconnect the fuel injector connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage

      Cylinder

      Tester Connection

      Switch Condition

      Specified Condition

      No. 1

      E1-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 2

      n1-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 3

      E2-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 4

      n2-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 5

      E3-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 6

      n3-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 7

      E4-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      No. 8

      n4-2 - Ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    NG

    INSPECT NO. 1 INTEGRATION RELAY (IG2)Click here

    OK

  2. INSPECT FUEL INJECTOR ASSEMBLY

    1. Inspect the fuel injector assembly

      Click here

      Result

      Result

      OK

      NG
    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

      E1-1 - Body ground

      Always

      10 kΩ or higher

      E1-1 - C31-6 (#10)

      Always

      Below 1 Ω

      No. 2

      n1-1 - Ground

      Always

      10 kΩ or higher

      n1-1 - C31-1 (#20)

      Always

      Below 1 Ω

      No. 3

      E2-1 - Ground

      Always

      10 kΩ or higher

      E2-1 - C31-7 (#30)

      Always

      Below 1 Ω

      No. 4

      n2-1 - Ground

      Always

      10 kΩ or higher

      n2-1 - C31-2 (#40)

      Always

      Below 1 Ω

      No. 5

      E3-1 - Ground

      Always

      10 kΩ or higher

      E3-1 - C31-8 (#50)

      Always

      Below 1 Ω

      No. 6

      n3-1 - Ground

      Always

      10 kΩ or higher

      n3-1 - C31-3 (#60)

      Always

      Below 1 Ω

      No. 7

      E4-1 - Ground

      Always

      10 kΩ or higher

      E4-1 - C31-9 (#70)

      Always

      Below 1 Ω

      No. 8

      n4-1 - Ground

      Always

      10 kΩ or higher

      n4-1 - C31-4 (#80)

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    OK

    REPLACE ECM

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT NO. 1 INTEGRATION RELAY (IG2)

    1. Inspect the No. 1 integration relay (IG2)

      Click here

      Result

      Result

      OK

      NG
    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - FUEL INJECTOR)

    NG

    REPLACE NO. 1 INTEGRATION RELAY

    Click here