Fuel Injector Circuit 1GR-FE

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

INSPECT FUEL INJECTOR ASSEMBLY

CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

INSPECT FUSE (INJ, IG2 MAIN)

INSPECT INTEGRATION NO.1 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

Inspection procedure

1.CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

1. Disconnect the fuel injector connector.

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

   Standard Voltage:

   Cylinder	Tester Connection	Switch Condition	Specified Condition
   No. 1	C5-1 - Ground	Ignition switch ON	11 to 14 V
   No. 2	C16-1 - Ground	Ignition switch ON	11 to 14 V
   No. 3	C7-1 - Ground	Ignition switch ON	11 to 14 V
   No. 4	C14-1 - Ground	Ignition switch ON	11 to 14 V
   No. 5	C9-1 - Ground	Ignition switch ON	11 to 14 V
   No. 6	C12-1 - Ground	Ignition switch ON	11 to 14 V

NG	Go to step 4

OK

2.INSPECT FUEL INJECTOR ASSEMBLY

1. Inspect the fuel injector .

NG	REPLACE FUEL INJECTOR ASSEMBLY

OK

3.CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - 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:

   for LHD

   Cylinder	Tester Connection	Condition	Specified Condition
   No. 1	C5-2 - Body ground	Always	10 k? or higher
   	C5-2 - C45-45 (#10)	Always	Below 1 ?
   No. 2	C16-2 - Body ground	Always	10 k? or higher
   	C16-2 - C45-85 (#20)	Always	Below 1 ?
   No. 3	C7-2 - Body ground	Always	10 k? or higher
   	C7-2 - C45-44 (#30)	Always	Below 1 ?
   No. 4	C14-2 - Body ground	Always	10 k? or higher
   	C14-2 - C45-84 (#40)	Always	Below 1 ?
   No. 5	C9-2 - Body ground	Always	10 k? or higher
   	C9-2 - C45-43 (#50)	Always	Below 1 ?
   No. 6	C12-2 - Body ground	Always	10 k? or higher
   	C12-2 - C45-83 (#60)	Always	Below 1 ?

   for RHD

   Cylinder	Tester Connection	Condition	Specified Condition
   No. 1	C5-2 - Body ground	Always	10 k? or higher
   	C5-2 - C46-45 (#10)	Always	Below 1 ?
   No. 2	C16-2 - Body ground	Always	10 k? or higher
   	C16-2 - C46-85 (#20)	Always	Below 1 ?
   No. 3	C7-2 - Body ground	Always	10 k? or higher
   	C7-2 - C46-44 (#30)	Always	Below 1 ?
   No. 4	C14-2 - Body ground	Always	10 k? or higher
   	C14-2 - C46-84 (#40)	Always	Below 1 ?
   No. 5	C9-2 - Body ground	Always	10 k? or higher
   	C9-2 - C46-43 (#50)	Always	Below 1 ?
   No. 6	C12-2 - Body ground	Always	10 k? or higher
   	C12-2 - C46-83 (#60)	Always	Below 1 ?

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE ECM

4.INSPECT FUSE (INJ, IG2 MAIN)

1. Remove the INJ fuse and IG2 MAIN fuse from the engine room relay block.

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   INJ fuse	Always	Below 1 ?
   IG2 MAIN fuse	Always	Below 1 ?

NG	CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE

OK

5.INSPECT INTEGRATION NO.1 RELAY (IG2)

1. Inspect the integration relay.

NG	REPLACE INTEGRATION NO.1 RELAY

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