Skylark L4-144 2.4L DOHC VIN T SFI (1997)
Speedometer Head: Description and Operation
The speedometer is a road speed indicator. All Instrument Clusters are equipped with both a trip odometer and a season odometer. A Vehicle Speed
Sensor (VSS) (permanent magnet generator) located on the transaxle inputs to the Powertrain Control Module (PCM) whenever the trans axle
differential carrier turns. The PCM then buffers the VSS signal and transmits it to the IPC, the Electronic Brake Control Module (EBCM), and the
Sensing Diagnostic Module (SDM) at 4000 pulses/mile via a hardwired connection (CKT 817).
