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.
Power Circuit Inspection
2009 Hyundai Sonata SE, 3.3 FSECTION Power Circuit Inspection
- Ignition "ON" & Engine "OFF".
- Disconnect the "ATT CONTROL RELAY" connector
- Measure the voltage between terminal "1" of the "A/T CONTROL RELAY" harness (JC101) connector and chassis ground.
Specification : Approx. B+
- Is voltage within specifications?
YES
- Go to "SIGNAL CIRCUIT INSPECTION " procedure
NO
- Check that A/T-20A Fuse in engine room junction is installed or not blown.
- Check for open in harness. Repair as necessary and Go to "VERIFICATION 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.