Circuit Description

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 VCM. VCM uses pulsed signal to calculate vehicle speed based on time between pulses.

Conditions for setting DTC:

• 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.
• Conditions met for 5 seconds.