Air Conditioning Solenoid Valve
On vehicles equipped with A/C, a solenoid valve delivers additional air to compensate for drop in idle speed when air conditioner is activated. The solenoid is electrically actuated through the compressor clutch circuit to apply vacuum to a circuit behind throttle plate.
The applied vacuum opens the vacuum diaphragm, which opens the additional air circuit. The diameter of the air circuit is 0.12" (3.0 mm) on manual transmission models and 0.14" (3.5 mm) on automatic transmission models. See Fig 1 .