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 12 (STARTING SYSTEM (2UZ-FE))RELAYON-VEHICLE INSPECTION

2009 Toyota Sequoia Limited, 5.7 Y, RWD

On-Vehicle Inspection

2009 Toyota Sequoia Limited, 5.7 Y, RWDSECTION On-Vehicle Inspection

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

INSPECT STARTER RELAY

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

Fig 1: Identifying Starter Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

RESISTANCE REFERENCE

Terminal Connection	Condition	Specified Condition
3 - 5	Battery voltage is not applied to terminals 1 and 2	10 kΩ or higher
3 - 5	Battery voltage is applied to terminals 1 and 2	Below 1 Ω

If the result is not as specified, replace the relay.

INSPECT MAIN BODY ECU (ACC RELAY)

Fig 2: Identifying Main Body ECU Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the ACC relay circuit.

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

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
DD47-DD8	Battery voltage is not applied to terminals DD45 and DD62	10 kΩ or higher
DD47-DD8	Battery voltage is applied to terminals DD45 and DD62	Below 1 Ω

If the result is not as specified, replace the main body ECU.

INSPECT ACC CUT RELAY

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

Fig 3: Identifying Acc Cut Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
3 - 4	Battery voltage is not applied to terminals 1 and 2	Below 1 Ω
3 - 4	Battery voltage is applied to terminals 1 and 2	10 kΩ or higher

If the result is not as specified, replace the relay.

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.