Toyota Venza: Fuel Injector Circuit

Toyota Venza Service Manual / 1ar-fe Engine Control / Sfi System / Fuel Injector Circuit

DESCRIPTION

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.	CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

(a) Disconnect the fuel injector assembly connector.

(b) Turn the ignition switch to ON.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
B44-1 - Body ground	Ignition switch ON	11 to 14 V
B45-1 - Body ground	Ignition switch ON	11 to 14 V
B46-1 - Body ground	Ignition switch ON	11 to 14 V
B47-1 - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration

*a	Front view of wire harness connector (to Fuel Injector Assembly)

GO TO STEP 4

2.	INSPECT FUEL INJECTOR ASSEMBLY

(a) Inspect the fuel injector assembly (See page ).

HINT:

Perform "Inspection After Repair" after replacing the fuel injector assembly (See page ).

REPLACE FUEL INJECTOR ASSEMBLY

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

(a) Disconnect the fuel injector assembly connector.

(b) Disconnect the ECM connector.

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
B44-2 - B58-85 (#10)	Always	Below 1 Ω
B45-2 - B58-84 (#20)	Always	Below 1 Ω
B46-2 - B58-83 (#30)	Always	Below 1 Ω
B47-2 - B58-82 (#40)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
B44-2 or B58-85 (#10) - Body ground	Always	10 kΩ or higher
B45-2 or B58-84 (#20) - Body ground	Always	10 kΩ or higher
B46-2 or B58-83 (#30) - Body ground	Always	10 kΩ or higher
B47-2 or B58-82 (#40) - Body ground	Always	10 kΩ or higher

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

4.	CHECK HARNESS AND CONNECTOR (IG2 RELAY - FUEL INJECTOR ASSEMBLY)

(a) Disconnect the fuel injector assembly connector.

(b) Remove the IG2 relay from the engine room relay block.

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
B44-1 - 5 (IG2 relay terminal)	Always	Below 1 Ω
B45-1 - 5 (IG2 relay terminal)	Always	Below 1 Ω
B46-1 - 5 (IG2 relay terminal)	Always	Below 1 Ω
B47-1 - 5 (IG2 relay terminal)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
B44-1 or 5 (IG2 relay terminal) - Body ground	Always	10 kΩ or higher
B45-1 or 5 (IG2 relay terminal) - Body ground	Always	10 kΩ or higher
B46-1 or 5 (IG2 relay terminal) - Body ground	Always	10 kΩ or higher
B47-1 or 5 (IG2 relay terminal) - Body ground	Always	10 kΩ or higher

CHECK ECM POWER SOURCE CIRCUIT

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - FUEL INJECTOR ASSEMBLY)

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