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.

2021 Lexus GX 460 BaseFACTORY OEM SERVICE PROCEDURE

Inspection [08/2015 - ]: Procedure

INSPECT THROTTLE BODY ASSEMBLY

Check the throttle valve.
1. Check that the throttle valve opens and closes smoothly.
2. Check that there is no sludge accumulating around the throttle body.

Check the throttle control motor.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

Tester Connection	Condition	Specified Condition
1 (M-) - 2 (M+)	20°C (68°F)	0.3 to 100 Ω

TEXT IN ILLUSTRATION

*a	Component without harness connected (Throttle Body)

If the result is not as specified, replace the throttle body assembly.

Factory Service Tools

Use the Manual With the Right Hardware

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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.