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Home >> Lexus >> 2000 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Removal, Overhaul, Installation >> Air Induction System >> Intake Air Control Valve >> Removal (SC300)
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Removal (SC300)

  1. Intake Air Control (IAC) valve is mounted underneath middle of air intake chamber. See Figure. Remove engine oil dipstick. Remove bolt and A/T oil dipstick and guide. Remove A/T oil dipstick guide "O" ring. Remove bolt and disconnect engine wiring harness protector from air intake chamber. Disconnect brake booster vacuum hose from intake chamber. Remove union bolt, brake booster union and gaskets.
  2. Remove intake air connector-to-air intake chamber bolts and nuts. Disconnect Power Steering (PS) hose and No. 2 vacuum pipe hose from air intake chamber. Disconnect Intake Air Control (IAC) valve (ACIS actuator) hose. See Figure. Disconnect Data Link Connector (DLC) No. 1 from air intake chamber. Remove bolts, nuts, air intake chamber and gaskets. Remove IAC valve.
  3. If servicing vacuum tank or ACIS vacuum switching valve, remove bolt and accelerator cable clamp. Disconnect ACIS vacuum switching valve connector. Disconnect vacuum hoses from vacuum tank and remove ACIS vacuum switching valve. Remove nuts and vacuum tank from intake manifold.
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