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.
ACIS Vacuum Switching Valve (VSV)
Disconnect vacuum hoses and electrical connector from VSV. See Figure and Figure. Remove VSV if necessary. Replace VSV if it does not operate as follows.
- Resistance across terminals is about 39-45 ohms.
- There is no continuity between VSV case (ground) and each terminal of VSV connector (this checks for an internal short).
- Blow through port "E". See Figure. Air comes out of filter, but not out of port "F".
- Apply battery voltage across terminals. Blow through port "E". Air comes out of port "F".
Use the Manual With the Right Hardware
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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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