Circuit Description
WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle Speed Sensor (VSS) is a magnetic induction type. Gear teeth pressed on outside of output shaft induce an AC current in sensor as shaft rotates. Signal goes directly to Vehicle Control Module (VCM). VCM uses pulsed signal to calculate vehicle speed based on time between pulses.
Conditions required to set DTC are:
- No MAP DTCs set.
- Throttle angle less than 3.125 percent.
- ECT greater than 140°F (60°C).
- Engine speed 1400-4400 RPM.
- MAP less than 20 kPa.
- Vehicle speed is less than one MPH.