Silhouette FWD V6-3.4L VIN E (2004)
Speedometer Head: Description and Operation
SPEEDOMETER
The IPC displays vehicle speed as determined by the PCM. The IPC receives a class 2 message from the PCM. The Vehicle Speed Sensor (VSS)
discrete signal is pulled up to ignition voltage in the PCM. The IPC uses the VSS data received from the PCM and a software program to determine the
proper vehicle speed to display.
