Vehicle Speed Sensor/Transducer - Cruise Control: Description and Operation

Vehicle speed signal
The cruise control ECU receives a road speed signal from the BeCM, which in turn receives the signal from the ABS ECU. The cruise control ECU compares the road speed signal with the required cruise speed and adjusts the output to the vacuum pump as necessary. Cruise control will not operate below the low speed threshold of 28 mph or above the high speed threshold of 125 mph.