Sfi System - Fuel Injector Circuit

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1UR-FE ENGINE CONTROL

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUEL INJECTOR ASSEMBLY (POWER SOURCE)

INSPECT FUEL INJECTOR ASSEMBLY

CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - ECM)

INSPECT NO. 1 INTEGRATION RELAY (IG2)

SFI SYSTEM - 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

Refer to DTC P0300 ().


INSPECTION PROCEDURE

  • NOTICE:
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.INSPECT FUEL INJECTOR ASSEMBLY (POWER SOURCE)
Sfi System - Fuel Injector Circuit. 1UR-FE ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the fuel injector connector.

Turn the engine switch on (IG).

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

  • Standard Voltage:
  • CylinderTester ConnectionSwitch ConditionSpecified Condition
    No. 1a5-2 - Body groundEngine switch on (IG)11 to 14 V
    No. 2a1-2 - Body groundEngine switch on (IG)11 to 14 V
    No. 3a6-2 - Body groundEngine switch on (IG)11 to 14 V
    No. 4a2-2 - Body groundEngine switch on (IG)11 to 14 V
    No. 5a7-2 - Body groundEngine switch on (IG)11 to 14 V
    No. 6a3-2 - Body groundEngine switch on (IG)11 to 14 V
    No. 7a8-2 - Body groundEngine switch on (IG)11 to 14 V
    No. 8a4-2 - Body groundEngine switch on (IG)11 to 14 V
Text in Illustration
*aFront view of wire harness connector
(to Fuel Injector Assembly)
NG
Go to step 4
OK
2.INSPECT FUEL INJECTOR ASSEMBLY

Inspect the fuel injector assembly ().

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

Disconnect the fuel injector connector.

Disconnect the ECM connector.

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

  • Standard Resistance:
  • for RHD
    CylinderTester ConnectionConditionSpecified Condition
    No. 1a5-1 - Body groundAlways10 kΩ or higher
    a5-1 - C46-86 (#10)AlwaysBelow 1 Ω
    No. 2a1-1 - Body groundAlways10 kΩ or higher
    a1-1 - C46-109 (#20)AlwaysBelow 1 Ω
    No. 3a6-1 - Body groundAlways10 kΩ or higher
    a6-1 - C46-85 (#30)AlwaysBelow 1 Ω
    No. 4a2-1 - Body groundAlways10 kΩ or higher
    a2-1 - C46-108 (#40)AlwaysBelow 1 Ω
    No. 5a7-1 - Body groundAlways10 kΩ or higher
    a7-1 - C46-84 (#50)AlwaysBelow 1 Ω
    No. 6a3-1 - Body groundAlways10 kΩ or higher
    a3-1 - C46-107 (#60)AlwaysBelow 1 Ω
    No. 7a8-1 - Body groundAlways10 kΩ or higher
    a8-1 - C46-83 (#70)AlwaysBelow 1 Ω
    No. 8a4-1 - Body groundAlways10 kΩ or higher
    a4-1 - C46-106 (#80)AlwaysBelow 1 Ω
  • for RHD
    CylinderTester ConnectionConditionSpecified Condition
    No. 1a5-1 - Body groundAlways10 kΩ or higher
    a5-1 - C45-86 (#10)AlwaysBelow 1 Ω
    No. 2a1-1 - Body groundAlways10 kΩ or higher
    a1-1 - C45-109 (#20)AlwaysBelow 1 Ω
    No. 3a6-1 - Body groundAlways10 kΩ or higher
    a6-1 - C45-85 (#30)AlwaysBelow 1 Ω
    No. 4a2-1 - Body groundAlways10 kΩ or higher
    a2-1 - C45-108 (#40)AlwaysBelow 1 Ω
    No. 5a7-1 - Body groundAlways10 kΩ or higher
    a7-1 - C45-84 (#50)AlwaysBelow 1 Ω
    No. 6a3-1 - Body groundAlways10 kΩ or higher
    a3-1 - C45-107 (#60)AlwaysBelow 1 Ω
    No. 7a8-1 - Body groundAlways10 kΩ or higher
    a8-1 - C45-83 (#70)AlwaysBelow 1 Ω
    No. 8a4-1 - Body groundAlways10 kΩ or higher
    a4-1 - C45-106 (#80)AlwaysBelow 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM ()
4.INSPECT NO. 1 INTEGRATION RELAY (IG2)

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

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