P0500 No Vehicle Speed Sensor Signal

SYMPTOM
P-0500 NO VEHICLE SPEED SENSOR SIGNAL

WHEN MONITORED
With engine running more than 31 seconds, engine temperature greater than 180 degrees F, transmission not in park or neutral, brakes not applied, engine rpm greater than 1800, and MAP vacuum less than 11".

SET CONDITION
No signal from the vehicle speed sensor for more than 11 seconds.

POSSIBLE CAUSES
- Shows EATX codes or pinion factor not programmed
- VSS sig circuit shows > 0 MPH when jumped to ground
- 8-volt supply circuit not above 7.0 volts
- VSS defective
- VSS ground circuit open
- VSS signal circuit open
- Speedometer pinion gear observable defect
- VSS signal circuit open
- VSS signal circuit short to ground
- PCM Defective
- PCM terminal observable defect
- VSS wiring harness observable defect
- VSS signal circuit open
- VSS signal circuit short to ground