Bonneville V8-4.6L VIN Y (2004)
Speedometer Head: Description and Operation
SPEEDOMETER
The IPC displays the vehicle speed based on the information from the PCM. The PCM converts the data from the vehicle speed sensor to a 4000
pulses/mile signal. The IPC uses the vehicle speed signal circuit from the PCM in order to calculate the vehicle speed. The speedometer defaults to 0
mph (0 km/h) if a malfunction in the vehicle speed signal circuit exists. The speedometer displays either miles or kilometers as requested by the
activation of the English/metric button. The associated indicator km/h or MPH) illuminates.
