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 SWITCHADJUSTMENTS
1991 Hyundai Sonata V6-3.0L
Throttle Full Close Switch: Adjustments
1991 Hyundai Sonata V6-3.0LSECTION Adjustments
NOTE: Since the Idle Switch (Fixed SAS) is adjusted at the factory, it is not necessary to adjust during normal service except for replacement.
Accelerator Cable Adjustment:
1. Loosen the tension of the accelerator cable.
Idle Switch:
2. Disconnect the idle switch connector.
Idle Switch Connector:
3. Loosen the idle switch lock nut.
4. Turn the idle switch counter clockwise until the throttle valve closes.
5. Connect an ohmmeter between the terminal of the idle switch and the throttle body.
6. Screw in the idle switch until continuity is found between the switch terminal and the throttle body. Screw in the idle switch an additional 1 and 1/4 turns from that point.
7. Tighten the lock nut and connect the idle switch connector.
NOTE: Insure that the idle switch does not move while tightening the lock nut.
8. Adjust the curb idle speed, see IDLE SPEED ADJUSTMENT SCREW (SAS).
9. Adjust the accelerator cable, see SPECIFICATIONS.
10. Adjust the TPS, see THROTTLE POSITION SENSOR (TPS).
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.