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.

2011 Acura MDXFACTORY OEM SERVICE PROCEDURE

Headlight Washer

The relay control module controls the headlight washer based on inputs from each switch.

	Input	Output
Relay control module	IG1 power supply Headlight low beam relay Headlight relay circuit (HIGH)	Headlight washer relay
B-CAN	Headlight washer switch Washer switch (FR WASH)

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.