Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1993E 350 VAN V8-7.3L DSLREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSDP - VEHICLE SPEED SENSOR (VSS)DP - TESTING NOTES
1993 Ford E 350 Van V8-7.3L DSL
DP - Testing Notes
1993 Ford E 350 Van V8-7.3L DSLSECTION DP - Testing Notes
NOTE: You should enter this Pinpoint Test only when you have been directed here from Quick Test or Pinpoint Test TG.
REMEMBER
This Pinpoint Test is intended to diagnose only the following:
- VSS Harness circuits
- Vehicle Speed Sensor
- Processor assembly
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 processor uses this signal to control fuel injection, ignition timing and transmission/transaxle shift points.
REMEMBER
This Pinpoint Test is intended to diagnose only the following:
- VSS Harness circuits
- Vehicle Speed Sensor
- Processor assembly
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 processor uses this signal to control fuel injection, ignition timing and transmission/transaxle shift points.
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.