Vehicle Speed Sensor (VSS)

ECM receives vehicle speed signal from ABS control module 29 times per 1 wheel rotation. On M/T vehicles, this is used to limit torque applied in reverse and 1st gears by controlling throttle angle, regardless of gas pedal position. On all models, in gears 2, 3, 4 and 5, ECM uses VSS to activate fuel shutoff on deceleration. It is also used to limit top speed, and to prevent idle speed control when vehicle is moving.