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Idle Air Control Thermal Valve: 3.5RL

WARNING: This page is about a different car, the 2004 Acura 3.5RL, 2003 Acura 3.5RL, 2003 Acura 3.2TL, and 2003 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove idle air control thermal valve cover.
  2. Start engine. Place finger over valve seat area, and ensure there is air flow with engine cold (engine coolant temperature below 86°F (30°C) and idling. See Fig 1 . If no air flow is present, replace idle air control thermal valve and retest.
  3. Start engine and hold at 3,000 RPM with no loads and transmission in park or neutral until radiator fan comes on, then let idle.
  4. Ensure that valve is completely closed. If any air flow is felt, valve is leaking. Check engine coolant level and for air in cooling system. If cooling system is okay, replace idle air control thermal valve and recheck.
NOTE: If idle air control thermal valve was removed, perform PCM reset procedure. See PCM RESET PROCEDURE/CLEARING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - 3.5RL article.
Fig 1: Identifying Fast Idle Thermo Valve Seat (3.5RL)
G96A10066Courtesy of AMERICAN HONDA MOTOR CO., INC.
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