DP - Testing Notes

1994 Ford Taurus V6-182 3.0L DOHC SHOSECTION DP - Testing Notes

Vehicle Speed Sensor Schematic:





DESCRIPTION
The Vehicle Speed Sensor (VSS) is a variable reluctance sensor that generates a waveform with a frequency that is proportional to vehicle speed. When the vehicle is moving slowly, the sensor produces a low frequency signal. As the vehicle speed increases, the sensor produces a higher frequency signal. The Powertrain Control Module (PCM) uses this signal to control fuel injection, ignition timing and transmission/transaxle shift points.

NOTE:
You should enter this Pinpoint Test only when you have been directed here from Diagnostic Routines or from Pinpoint Test TG.

REMEMBER:
This Pinpoint Test is intended to diagnose only the following:

- VSS Harness Circuits

- Vehicle Speed Sensor

- PCM

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.