Pathfinder & Pickup

Start engine and warm to normal operating temperature. Run engine at 2000 RPM for 2 minutes.
Perform self-diagnostic procedure. See G - TESTS W/ CODES article. Check for smooth engine operation. Check ignition timing. With ignition timing correctly set, locate ECU under passenger's seat.
Check idle speed (auto. trans. in Neutral). See V6 IDLE SPEED & CO LEVEL TABLE . If idle speed is correct, go to step 5). If idle speed is incorrect, disconnect Auxiliary Air Control (AAC) valve harness connector.
Adjust idle speed by turning idle speed adjusting screw. See Fig 1 . Reconnect (AAC) valve harness connector. Recheck ignition timing and idle speed. With idle speed correctly set, check idle mixture.

Fig 1: Locating Idle Speed Adjusting Screw (Pathfinder & Pickup V6)

Courtesy of NISSAN MOTOR CO., U.S.A.