Avalon, Highlander & Sienna (Preliminary Inspection)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Throttle body lever adjustment must be performed if throttle body or Idle Air Control (IAC) valve is replaced, or if throttle body or IAC valve is removed and reinstalled. Perform preliminary inspection to determine if throttle body lever adjustment must be performed. Throttle stop screws and throttle opener are preset. DO NOT alter throttle stop screw or throttle opener adjustment.
- Using vacuum pump, apply 15.7 in. Hg of vacuum to throttle opener. Perform STEP 1 in illustration. See Fig 1.
- Ensure clearance exists at tip throttle opener and no clearance exists between throttle stop screws and throttle levers. Perform STEP 1 in illustration. See Fig 1.
- Note location of No. 1 and 2 throttle bodies on No. 1 intake air control valve. Perform STEP 2 in illustration. See Fig 1.
- With 15.7 in. Hg of vacuum still applied to throttle opener, using feeler gauge, check that a clearance of about.0051" (.130 mm) exists between close side adjusting screw and throttle lever on No. 1 throttle body, and a clearance of about.0087" (.220 mm) clearance exists between open side adjusting screw and throttle lever on No. 1 throttle body. Perform STEP 3 in illustration. See Fig 1.
- Release vacuum and disconnect vacuum pump. Fully open throttle lever on No. 2 throttle body and use feeler gauge to measure clearance between close side adjusting screw and throttle lever on No. 1 throttle body. Perform STEP 4 in illustration. See Fig 1. Clearance between close side adjusting screw and throttle lever on No. 1 throttle body should be.0098-.0177" (.250-.450 mm).
- If all clearances are as specified, throttle body lever adjustment is not required. If any clearance is not as specified, throttle body lever adjustment procedure must be performed. Proceed to adjustment procedure.