Toyota Tundra (2015 year). Manual — part 1312

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17.

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

(a) Check the fuel pump operation.

OK:

Malfunction has been repaired successfully.

NG

REPLACE ECM

OK

END

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Co...

Last Modified: 9-16-2014

6.6 J

Doc ID: RM000003302057X

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector Circuit; 2015 MY Tundra [08/2014 - ]

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

PROCEDURE

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector C...

OK

1.

INSPECT 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:

CYLINDER

TESTER

CONNECTION

SWITCH

CONDITION

SPECIFIED

CONDITION

No. 1

H1-2 - Ground

Ignition switch

ON

11 to 14 V

No. 2

F1-2 - Ground

Ignition switch

ON

11 to 14 V

No. 3

H2-2 - Ground

Ignition switch

ON

11 to 14 V

No. 4

F2-2 - Ground

Ignition switch

ON

11 to 14 V

No. 5

H3-2 - Ground

Ignition switch

ON

11 to 14 V

No. 6

F3-2 - Ground

Ignition switch

ON

11 to 14 V

No. 7

H4-2 - Ground

Ignition switch

ON

11 to 14 V

No. 8

F4-2 - Ground

Ignition switch

ON

11 to 14 V

NG

GO TO STEP 4

2.

INSPECT FUEL INJECTOR ASSEMBLY

(a) Inspect the fuel injector assembly

.

HINT:

Perform "Inspection After Repair" after replacing the fuel injector assembly

.

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector C...

OK

NG

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.

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

below.

Standard Resistance:

CYLINDER

TESTER

CONNECTION

CONDITION

SPECIFIED

CONDITION

No. 1

H1-1 - Ground

Always

10 kΩ or higher

H1-1 - D74-86 (#10)

Always

Below 1 Ω

No. 2

F1-1 - Ground

Always

10 kΩ or higher

F1-1 - D74-109

(#20)

Always

Below 1 Ω

No. 3

H2-1 - Ground

Always

10 kΩ or higher

H2-1 - D74-85 (#30)

Always

Below 1 Ω

No. 4

F2-1 - Ground

Always

10 kΩ or higher

F2-1 - D74-108

(#40)

Always

Below 1 Ω

No. 5

H3-1 - Ground

Always

10 kΩ or higher

H3-1 - D74-84 (#50)

Always

Below 1 Ω

No. 6

F3-1 - Ground

Always

10 kΩ or higher

F3-1 - D74-107

(#60)

Always

Below 1 Ω

No. 7

H4-1 - Ground

Always

10 kΩ or higher

H4-1 - D74-83 (#70)

Always

Below 1 Ω

No. 8

F4-1 - Ground

Always

10 kΩ or higher

F4-1 - D74-106

(#80)

Always

Below 1 Ω

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector C...