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.
How to Enter the Diagnosis Mode (From Normal Operation Mode): Procedure
2003 Acura MDX TouringSECTION Procedure
- Start with the ignition switch in the OFF (0) position
- Press and hold down the CALL ANSWER/CALL END button.
- Cycle the ignition switch from the OFF (0) position to the ACC (I) position 4 times within 6 seconds, and stop in the ACC (I) position on the fourth cycle.
- Release the CALL ANSWER/CALL END button to enter the diagnosis mode.
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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.