Vehicle Speed Sensor: Description and Operation

1993 Dodge Colt L4-1468cc 1.5L SOHCSECTION Description and Operation









OPERATION
The vehicle speed sensor, which is located in the speedometer, converts the vehicle speed into a pulse signal and inputs it to the engine control module, which then provides the idle air control, etc., based on this signal.

The vehicle speed sensor generates the vehicle speed signal by repeatedly opening and closing between the voltage of about 5V applied from the engine control module and ground using a reed switch.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.