SFI SYSTEM > Fuel Injector Circuit

for Preparation Click here


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


A240772E01


INSPECTION PROCEDURE

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

1.INSPECT POWER SOURCE CIRCUIT


    A200903E01

  1. Disconnect the fuel injector assembly connector.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C1-1 - Body ground
    		Ignition switch ON
    		11 to 14 V
    C2-1 - Body ground
    		Ignition switch ON
    		11 to 14 V
    C3-1 - Body ground
    		Ignition switch ON
    		11 to 14 V

    Text in Illustration 
    *1
    		Front view of wire harness connector:
    (to Fuel Injector Assembly)

  1. Reconnect the fuel injector assembly connector.



NG
Go to step 4
OK


2.INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME)

  1. Check the fuel injector injection and volume (Click here).



NG
REPLACE FUEL INJECTOR ASSEMBLY (Click here)
OK


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


    A200904E01

  1. Disconnect the fuel injector assembly connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    C1-2 - B8-86 (#10)
    		Always
    		Below 1 Ω
    C2-2 - B8-85 (#20)
    		Always
    		Below 1 Ω
    C3-2 - B8-84 (#30)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    C1-2 or B8-86 (#10) - Body ground
    		Always
    		10 kΩ or higher
    C2-2 or B8-85 (#20) - Body ground
    		Always
    		10 kΩ or higher
    C3-2 or B8-84 (#30) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector:
    (to Fuel Injector Assembly)
    *2
    		Front view of wire harness connector:
    (to ECM)

  1. Reconnect the fuel injector assembly connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE FUEL INJECTOR ASSEMBLY (Click here)  

4.INSPECT INTEGRATION NO.1 RELAY (IG2 RELAY)


    A201296E01

  1. Remove the integration relay (IG2 relay) from the engine room relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1A-1 - 1E-4
    		When battery voltage absent
    		10 kΩ or higher
    1A-1 - 1E-4
    		When battery voltage applied to terminals 1D-11 and 1C-3
    		Below 1 Ω

    Text in Illustration 
    *1
    		Component without harness connected:
    (Integration Relay)

  1. Reinstall the integration relay.



NG
REPLACE INTEGRATION NO.1 RELAY (Click here)
OK

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