Rodeo (2WD) L4-2559cc 2.6L SOHC (4ZE1) (1991)
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Vehicle Speed Sensor: Description and Operation
PURPOSE
Informs the ECM of vehicle speed.
LOCATION
An integral part of the speedometer assembly.
OPERATION
The ECM applies and monitors a 12V signal to the sensor. When the drive wheels are turning, the sensor alternately grounds the circuit, creating a
pulsing action. The ECM calculates vehicle speed based on the time between pulses.
