ECM Code EO24: Speed Sensor Circuit Problem: Action:

ECM turns on SERVICE ENGINE SOON light and disables Viscous Converter Clutch (VCC) and cruise control. The Vehicle Speed Sensor (VSS) is a permanent magnet pulse generator mounted in the transaxle. The ECM uses VSS input for VCC apply-and release determinations, to select between RPM and throttle angle control of ISC, and as a test condition for many codes.

Test Number 1)  Speed sensor provides a voltage signal to ECM depending upon vehicle speed. With tires moving, signal to ECM should be at least .5 volt AC.