Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIB1
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: Fuel Injector Circuit; 2016 MY Sienna [12/2015 - 08/2016]

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 connectors.

(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

B7-2 - Body ground

Ignition switch ON

11 to 14 V

B8-2 - Body ground

Ignition switch ON

11 to 14 V

B9-2 - Body ground

Ignition switch ON

11 to 14 V

B10-2 - Body ground

Ignition switch ON

11 to 14 V

B11-2 - Body ground

Ignition switch ON

11 to 14 V

B12-2 - 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 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE FUEL: FUEL INJECTOR: INSPECTION ).

HINT:

Perform "Inspection After Repair" after replacing the fuel injector assembly (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

NG

REPLACE FUEL INJECTOR ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

(a) Disconnect the B7, B8, B9, B10, B11 and B12 fuel injector assembly connectors.

(b) Disconnect the B1 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

B7-1 - B1-86 (#10)

Always

Below 1 Ω

B8-1 - B1-109 (#20)

Always

Below 1 Ω

B9-1 - B1-85 (#30)

Always

Below 1 Ω

B10-1 - B1-108 (#40)

Always

Below 1 Ω

B11-1 - B1-84 (#50)

Always

Below 1 Ω

B12-1 - B1-107 (#60)

Always

Below 1 Ω

B7-1 or B1-86 (#10) - Body ground

Always

10 kΩ or higher

B8-1 or B1-109 (#20) - Body ground

Always

10 kΩ or higher

B9-1 or B1-85 (#30) - Body ground

Always

10 kΩ or higher

B10-1 or B1-108 (#40) - Body ground

Always

10 kΩ or higher

B11-1 or B1-84 (#50) - Body ground

Always

10 kΩ or higher

B12-1 or B1-107 (#60) - 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

4.

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

(a) Disconnect the B7, B8, B9, B10, B11 and B12 fuel injector assembly connectors.

(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:

Tester Connection

Condition

Specified Condition

B7-2 - 3 (IG2 relay holder)

Always

Below 1 Ω

B8-2 - 3 (IG2 relay holder)

Always

Below 1 Ω

B9-2 - 3 (IG2 relay holder)

Always

Below 1 Ω

B10-2 - 3 (IG2 relay holder)

Always

Below 1 Ω

B11-2 - 3 (IG2 relay holder)

Always

Below 1 Ω

B12-2 - 3 (IG2 relay holder)

Always

Below 1 Ω

B7-2 or 3 (IG2 relay holder) - Body ground

Always

10 kΩ or higher

B8-2 or 3 (IG2 relay holder) - Body ground

Always

10 kΩ or higher

B9-2 or 3 (IG2 relay holder) - Body ground

Always

10 kΩ or higher

B10-2 or 3 (IG2 relay holder) - Body ground

Always

10 kΩ or higher

B11-2 or 3 (IG2 relay holder) - Body ground

Always

10 kΩ or higher

B12-2 or 3 (IG2 relay holder) - Body ground

Always

10 kΩ or higher

OK

CHECK ECM POWER SOURCE CIRCUIT

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR