СИСТЕМА SFI Fuel Injector Circuit

Информация добавлена 08-08-2017

DESCRIPTION

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

WIRING DIAGRAM

A01A4ZOE02

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

    B001UWDC01
    *a

    Front view of wire harness connector

    (to Fuel Injector Assembly)

    1. Disconnect the fuel injector assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C48-1 - Body ground Engine switch on (IG) 11 to 14 V
      C49-1 - Body ground Engine switch on (IG) 11 to 14 V
      C50-1 - Body ground Engine switch on (IG) 11 to 14 V
      C51-1 - Body ground Engine switch on (IG) 11 to 14 V
      C52-1 - Body ground Engine switch on (IG) 11 to 14 V
      C53-1 - Body ground Engine switch on (IG) 11 to 14 V

    3. Reconnect the fuel injector assembly connector.

      Result
      Proceed to
      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
      Proceed to
      OK
      NG

    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

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


    1. Disconnect the C48, C49, C50, C51, C52 and C53 fuel injector assembly connectors.

    2. Disconnect the C31 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C48-2 - C31-6 (#10) Always Below 1 Ω
      C49-2 - C31-1 (#20) Always Below 1 Ω
      C50-2 - C31-7 (#30) Always Below 1 Ω
      C51-2 - C31-2 (#40) Always Below 1 Ω
      C52-2 - C31-8 (#50) Always Below 1 Ω
      C53-2 - C31-3 (#60) Always Below 1 Ω
      C48-2 or C31-6 (#10) - Body ground Always 10 kΩ or higher
      C49-2 or C31-1 (#20) - Body ground Always 10 kΩ or higher
      C50-2 or C31-7 (#30) - Body ground Always 10 kΩ or higher
      C51-2 or C31-2 (#40) - Body ground Always 10 kΩ or higher
      C52-2 or C31-8 (#50) - Body ground Always 10 kΩ or higher
      C53-2 or C31-3 (#60) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      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
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE NO. 1 INTEGRATION RELAY (IG2) Click here