Land Cruiser & Sequoia
For Idle Air Control (IAC) system testing procedures, see Fig 1 and Fig 2 . To check air induction system, see ACOUSTIC CONTROL INDUCTION SYSTEM in AIR INDUCTION SYSTEMS. To replace air induction system, see AIR INDUCTION SYSTEMS in REMOVAL & INSTALLATION - V6 & V8. To check throttle control system, see THROTTLE BODY . To replace throttle body, see THROTTLE BODY under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8. For circuit identification, see ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. See ENGINE CONTROL MODULE POWER & GROUND CIRCUITS under COMPUTERIZED ENGINE CONTROLS.