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.
Component Inspection
2009 Hyundai Sonata SE, 3.3 FSECTION Component Inspection
WARNING: This page is about a different variant/trim than selected.
- Ignition "OFF".
- Remove "A/T CONTROL RELAY"
- Measure the resistance between each terminal of the sensorRESISTANCE REFERENCE
Item Terminal No Resistance 1 (red) - 3 (black) INFINITE 2 (black) - 4 (red) Supply (B+) to number 4 and supply (B-) to number 2. 1 (red) - 3 (black) 0 Ω - Is resistance within specifications?
YES
- Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Replace ATM CONTROL RELAY and then go to "VERIFICATION OF VEHICLE REPAIR " procedure
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.