Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSTOYOTA2009SEQUOIA LIMITED, 5.7 Y, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 28 (ENGINE CONTROL SYSTEM (2UZ-FE) - COMPONENT AND SYSTEM TESTING, ON-VEHICLE INSPECTION, REMOVAL, INSPECTION & INSTALLATION)FUEL INJECTOR CIRCUITINSPECTION PROCEDURE

2009 Toyota Sequoia Limited, 5.7 Y, RWD

Inspection Procedure

2009 Toyota Sequoia Limited, 5.7 Y, RWDSECTION Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)

Disconnect the fuel injector connector.
Turn the ignition switch to ON.

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

Standard Voltage

VOLTAGE SPECIFIED CONDITION

Cylinder No.	Tester Connection	Switch Condition	Specified Condition
No. 1	D60-1 - Ground	Ignition switch ON	11 to 14 V
No. 2	D67-1 - Ground	Ignition switch ON	11 to 14 V
No. 3	D61-1 - Ground	Ignition switch ON	11 to 14 V
No. 4	D66-1 - Ground	Ignition switch ON	11 to 14 V
No. 5	D62-1 - Ground	Ignition switch ON	11 to 14 V
No. 6	D65-1 - Ground	Ignition switch ON	11 to 14 V
No. 7	D63-1 - Ground	Ignition switch ON	11 to 14 V
No. 8	D64-1 - Ground	Ignition switch ON	11 to 14 V

Fig 1: Identifying Fuel Injector Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : Go to step 4

OK : Go to next step

INSPECT FUEL INJECTOR ASSEMBLY
1. Inspect the fuel injector (See INSPECTION ).
  NG : REPLACE FUEL INJECTOR ASSEMBLY (See FUEL INJECTOR )
  
  OK : Go to next step

CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

Disconnect the fuel injector connector.
Disconnect the ECM connector.

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

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Cylinder	Tester Connection	Condition	Specified Condition
No. 1	D60-2 - Body ground	Always	10 kΩ or higher
No. 1	D60-2 - D56-86 (#10)	Always	Below 1 Ω
No. 2	D67-2 - Body ground	Always	10 kΩ or higher
No. 2	D67-2 - D56-109 (#20)	Always	Below 1 Ω
No. 3	D61-2 - Body ground	Always	10 kΩ or higher
No. 3	D61-2 - D56-85 (#30)	Always	Below 1 Ω
No. 4	D66-2 - Body ground	Always	10 kΩ or higher
No. 4	D66-2 - D56-108 (#40)	Always	Below 1 Ω
No. 5	D62-2 - Body ground	Always	10 kΩ or higher
No. 5	D62-2 - D56-84 (#50)	Always	Below 1 Ω
No. 6	D65-2 - Body ground	Always	10 kΩ or higher
No. 6	D65-2 - D56-107 (#60)	Always	Below 1 Ω
No. 7	D63-2 - Body ground	Always	10 kΩ or higher
No. 7	D63-2 - D56-83 (#70)	Always	Below 1 Ω
No. 8	D64-2 - Body ground	Always	10 kΩ or higher
No. 8	D64-2 - D56-106 (#80)	Always	Below 1 Ω

Fig 2: Identifying Fuel Injector Connector And D56 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : REPLACE ECM (See REMOVAL )

INSPECT FUSE (INJ, IG2 MAIN)

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

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

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
INJ fuse	Always	Below 1 Ω
IG2 fuse	Always	Below 1 Ω

Fig 3: Identifying INJ And IG2 Main Fuses

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

OK : Go to next step

INSPECT INTEGRATION RELAY (IG2)
1. Inspect the integration relay (See ON-VEHICLE INSPECTION ).
  NG : REPLACE INTEGRATION RELAY
  
  OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (INTEGRATION RELAY - FUEL INJECTOR ASSEMBLY)

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.