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.
Throttle Switch (Swift SOHC M/T)
Throttle switch consists of 2-contact points (idle switch and wide open switch) connected to throttle valve shaft on throttle body and detects throttle valve opening. Throttle opening during idle is detected by idle switch which turns on at idle. Wide open throttle is detected by wide open throttle switch which turns on during wide open throttle. By monitoring on/off signals, ECM detects throttle valve opening. ECM uses on/off signals from throttle switch to help determine control of fuel injector, Idle Speed Control (ISC) solenoid, shift-up indicator light and EGR vacuum switching valve.
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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.