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 MANUALSHYUNDAI1999ELANTRA WAGON L4-2.0LREPAIR AND DIAGNOSISSTARTING AND CHARGINGSTARTING SYSTEMIGNITION SWITCHDESCRIPTION AND OPERATION
1999 Hyundai Elantra Wagon L4-2.0L
Ignition Switch: Description and Operation
1999 Hyundai Elantra Wagon L4-2.0LSECTION Description and Operation
IGNITION SWITCH-ST AND TRANSAXLE RANGE SWITCH [A/T]
When the ignition switch is in the ST position, the battery voltage is applied through the ignition switch and inhibitor switch to the ECM. If the selector lever is not in P or N position, the battery voltage will not reach the ECM.
Based on this signal, the ECM determines the automatic transaxle load and drives the idle speed control actuator to maintain optimum idle speed.
IGNITION SWITCH-ST [M/T]
The ignition switch-ST inputs a high signal to the ECM while the engine is cranking. The ECM provides fuel injection control, etc. at engine Start-up based on this signal.
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.