Sfi System Fuel Injector Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

INSPECT FUEL INJECTOR ASSEMBLY

CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

INSPECT NO. 1 INTEGRATION RELAY (IG2)

SFI SYSTEM - Fuel Injector Circuit


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

Refer to DTC P0300 (LandCruiser RM000000XH3129X_07.html).

INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)
Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System.Sfi System Fuel Injector Circuit

  1. Disconnect the fuel injector assembly connector.

  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
    		Engine switch on (IG)
    		11 to 14 V
    C2-1 - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    C3-1 - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    C4-1 - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    C5-1 - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    C6-1 - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    Text in Illustration
    *a
    		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

  1. Inspect the fuel injector assembly (LandCruiser RM000000WQQ0BHX.html).

    HINT:
    for Automatic Transmission
    Perform "Inspection After Repair" after replacing the fuel injector assembly (LandCruiser RM000004NJC03SX.html).


NG
REPLACE FUEL INJECTOR ASSEMBLY (LandCruiser RM000000Q480CHX.html)
OK


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

  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 - C37-6 (#10)
    		Always
    		Below 1 Ω
    C2-2 - C37-1 (#20)
    		Always
    		Below 1 Ω
    C3-2 - C37-7 (#30)
    		Always
    		Below 1 Ω
    C4-2 - C37-2 (#40)
    		Always
    		Below 1 Ω
    C5-2 - C37-8 (#50)
    		Always
    		Below 1 Ω
    C6-2 - C37-3 (#60)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    C1-2 or C37-6 (#10) - Body ground
    		Always
    		10 kΩ or higher
    C2-2 or C37-1 (#20) - Body ground
    		Always
    		10 kΩ or higher
    C3-2 or C37-7 (#30) - Body ground
    		Always
    		10 kΩ or higher
    C4-2 or C37-2 (#40) - Body ground
    		Always
    		10 kΩ or higher
    C5-2 or C37-8 (#50) - Body ground
    		Always
    		10 kΩ or higher
    C6-2 or C37-3 (#60) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the fuel injector assembly connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (LandCruiser RM00000329203TX.html)

4.INSPECT NO. 1 INTEGRATION RELAY (IG2)

  1. Inspect the No. 1 integration relay (LandCruiser RM000003BLB03QX_01_0002.html).



NG
REPLACE NO. 1 INTEGRATION RELAY (IG2)
OK

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