Circuit Description
WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
A toothed wheel mounted on output shaft of transmission generates an AC voltage pulse as it moves past Vehicle Speed Sensor (VSS). VSS contains a permanent magnet surrounded by a coil of wire, which produces a magnetic field. As toothed ring interrupts magnetic field, an AC pulse is generated. As vehicle speed increases, AC voltage pulse also increases.
DTC will set when the following conditions are present:
- DTCs P0107, P0108, P0117, P0118, P0121, P0122, P0123, P0125, P0506 and P0507 are not set.
- ECT greater than 95°F (35°C).
- Engine speed greater than 1000 RPM.
- TP sensor angle between 5-100 percent.
- MAP between 40-100 kPa with A/C off.
- MAP between 45-100 kPa with A/C on.
- Conditions met for 2 seconds.
- PCM detects vehicle speed at zero MPH for 100 seconds.