Operation CHARM
: Car repair manuals for everyone.
Home
>>
Buick
>>
1998
>>
Park Avenue Ultra V6-3.8L SC VIN 1
>>
Repair and Diagnosis
>>
Instrument Panel, Gauges and Warning Indicators
>>
Testing and Inspection
>>
Component Tests and General Diagnostics
>>
Gauge Functions
>>
Vehicle Speed
Vehicle Speed
Vehicle speed is obtained over a discrete input from the Powertrain Control Module
(PCM)
. This vehicle speed pulse train is expressed as
4000 pulses per mile
.