Inspecting Idle Speed

Start the engine and let it warm up until the cooling fan comes on. Ensure all accessories are off.
Connect a tachometer to the test tachometer connector. Connect power for tachometer to jump start terminal located in the engine compartment fuse/relay box. See Fig 1 .

Fig 1: Connecting Test Tachometer
Courtesy of AMERICAN HONDA MOTOR CO., INC.
For engine idle speed, see ENGINE IDLE SPEED .
For adjustment procedures, see 1991-2001 ON-VEHICLE ADJUSTMENTS -- NSX & NSX-T article.

ENGINE IDLE SPEED