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.
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HOMESERVICE MANUALSHYUNDAI2009SONATA SE, 3.3 FREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLESC (ELECTRONIC STABILITY CONTROL) SYSTEMTROUBLESHOOTING FOR DTCC1503 TCS/ESP SWITCH ERRORMONITOR SCANTOOL DATA
2009 Hyundai Sonata SE, 3.3 F
Monitor Scantool Data
2009 Hyundai Sonata SE, 3.3 FSECTION Monitor Scantool Data
- Connect scantool to Data Link Connector (DLC).
- Ignition "ON" & Engine "OFF".
- Press the ESC SWITCH.
- Monitor the "ESP OFF SWITCH" parameter on the scantool.
Normal Data
- Whenever the switch is pushed up/down, is the esp off switch's scantool data changed ON/OFF?
YES
- Fault is intermittent caused by poor connection in esp switch line or was repaired and HECU memory was not cleared. 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
- Go to "W/HARNESS INSPECTION " 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.