Idle Up Control Valve: Description and Operation

Idle Speed Adjustment:

PURPOSE
The fast idle control device (FICD) allows additional air to bypass the throttle plate during air conditioning operation.

LOCATION
The FICD is located near the firewall on the right side of the engine compartment.

OPERATION
When the A/C compressor is turned ON, the ECU responds to the increased engine load by energizing the fast idle solenoid. When energized, the solenoid opens an idle bypass passage, allowing additional air around the throttle valve and raising the idle speed. An adjusting screw regulates the amount of bypass air. A faulty fast idle solenoid does not set a trouble code.