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.
1995 Lexus SC 300 AutomaticFACTORY OEM SERVICE PROCEDURE
ACIS System Check
- Connect vacuum gauge between IACV actuator and VSV. See Fig 1. See COMPONENT LOCATIONS under INTRODUCTION. Start engine. With engine idling, gauge needle should indicate no vacuum.
- While snapping throttle fully open and releasing it, IACV actuator rod should move, and gauge needle should quickly fluctuate to the following specification:
- About 10 in. Hg or more.
- System is okay if it operates as specified. If system does not operate as specified, perform ACIS CIRCUITS test.
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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