EG–227 ENGINE – SFI SYSTEM (2JZ–GE) IAC VALVE REMOVAL 1. REMOVE THROTTLE BODY (See throttle body removal) 2. REMOVE IAC VALVE FROM THROTTLE BODY Remove the 2 screws, IAC valve and O–ring. P11467 IAC VALVE INSPECTION INSPECT IAC VALVE OPERATION (a) Apply battery voltage to terminals B1 and B2, and while repeatedly grounding S1–S2–S3–S4–S 1 in sequence, and check that the valve moves toward the closed position. Closed B1 S3 S1 S4 S2 B2 Battery P10701 (b) Apply battery voltage to terminals B1 and B2, and while repeatedly grounding S4–S3–S2–S1–S 4 in sequence, check that the valve moves toward the open position. If operation is not as specified, replace the IAC valve. Open B1 S3 S1 S4 S2 B2 Battery P10700 IAC VALVE INSTALLATION 1. INSTALL IAC VALVE TO THROTTLE BODY (a) Install a new O–ring on the throttle body. (b) Install the IAC valve with the 2 screws. 2. INSTALL THROTTLE BODY (See throttle body installation) New O-Ring P11468