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Home >> Plymouth >> 1989 >> Horizon Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 2.2L/2.5L SPFI Tests/Code >> Operation >> Automatic Idle Speed (AIS) Motor

Automatic Idle Speed (AIS) Motor

AIS motor adjusts idle speed to compensate for engine load and ambient temperature. The AIS motor varies the amount of air by-pass through throttle body. SMEC uses coolant temperature, distance (speed) sensor, throttle position sensor, and various switch inputs to adjust AIS to obtain optimum idle conditions.