Step "D"

Turn headlights off. Turn blower motor to high speed with A/C on. Allow engine to idle and check idle speed after one minute. See IDLE SPEED SPECIFICATIONS (PRELUDE)  table. If engine idle speed is not as specified, go to TROUBLE SHOOTING - NO CODES article.

Fig 1: Locating Throttle Body Components & Idle Adjusting Screw (Accord 3.0L Shown; Other Models Are Similar)

Courtesy of AMERICAN HONDA MOTOR CO., INC.