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 MANUALSHYUNDAI1991SONATA V6-3.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE FULL CLOSE SWITCHTESTING AND INSPECTION
1991 Hyundai Sonata V6-3.0L
Throttle Full Close Switch: Testing and Inspection
1991 Hyundai Sonata V6-3.0LSECTION Testing and Inspection
Idle Switch:
To test the Idle Switch, located on the throttle body, proceed as follows.
Trottle Position Sensor (TPS) Connector Location:
Idle Switch Test Hook-up:
1. Disconnect the TPS (throttle position sensor) connector.
2. Check for continuity between terminal 1 and the body ground.
Terminal 1: Idle Switch
3. Depress the accelerator off the idle position and check for continuity, there should be none (infinite ohm). Release the throttle to the idle position and test for continuity again, there should be continuity (0 ohm).
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.