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.
1989 Suzuki Swift GLX, AutomaticFACTORY OEM SERVICE PROCEDURE
ISC Solenoid
- Disconnect solenoid wire harness connector and measure resistance between terminals. Resistance should be 30-33 ohms.
- If ISC solenoid resistance is within specification, remove vacuum hoses and apply low pressure air through lower port. Air should NOT pass through. Apply 12 volts to ISC solenoid and apply low pressure air through lower port. Air should pass through. If different results are obtained, replace ISC solenoid.
- If ISC valve still does not function but performance was acceptable in step 2), check Red/White wire to ECM for poor connections, open circuit or short to ground. If circuit is okay, substitute a known good ECM and recheck.
Factory Service Tools
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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.
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