Test Notes

You should enter this pinpoint test only when directed here.

Verify that the speedometer is working properly before performing this test. If not, refer to Instrumental Panel, Gauges and Warning Indicators.

This pinpoint test is intended to diagnose:
- Vehicle Speed Sensor (VSS)
- Harness circuit: VSS
- Powertrain Control Module (PCM)

DESCRIPTION
The VSS, as it is turned by the speedometer pinion, generates an AC voltage that is sent to the speedometer. This AC voltage signal is developed into a 0.5 volt DC digital voltage at the speedometer and sent to the PCM.