Tercel Sedan 4-Door L4-1456cc 1.5L SOHC (3E-E) (1992)
Idle Up Control Valve: Description and Operation
Idle-Up Vacuum Switching Valve
Idle-Up Vacuum Switching Valve (VSV)
Whenever the ECU senses activation of the air conditioning compressor, the Idle-up VSV is activated to increase base idle speed. The Idle-up VSV is a
calibrated air bleed around the throttle valve and feeds air to the engine through vacuum hoses. The Idle-up VSV inputs the ECU through terminal
V-ISC.