Manual Transaxle

Idle Speed Control System:

PURPOSE
System permits PCME control of bypass air through throttle body, improving starting, warm-up, idle smoothness, and driveability.

LOCATION
Bypass air control valve is on top of throttle body.

OPERATION
Bypass Air Control Valve (BAC) consists of a PCME controlled idle air control valve and an air valve that opens and closes according to engine coolant temperature. The air valve is open on cold start and closes by the time operating temperature is reached. The idle air control valve is PCME controlled to allow bypass air compensation according to a number of inputs (engine temperature, load from P/S, A/C, and A/T).