Toyota Venza manuals

Toyota Venza: 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.

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

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)


NG

GO TO STEP 4


OK

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 ).



NG

REPLACE FUEL INJECTOR ASSEMBLY


OK

3.

CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

(a) Disconnect the fuel injector assembly connector.

(b) Disconnect the ECM connector.

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

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


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

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.

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

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


OK

CHECK ECM POWER SOURCE CIRCUIT


NG

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

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