Idle Air Control Valve: 4Runner

For Idle Air Control (IAC) system testing procedures, see Fig 1 Figure and Fig 2 Figure . 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 .

Fig 1: Testing Idle Air Control System - Circuit Description & Steps 1-2 (4Runner)

Fig 2: Testing Idle Air Control System - Step 3 (4Runner)