FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

Speedometer

The vehicle speed is calculated by the IPC based on the discrete vehicle speed input (CKT 817 (DK GRN)) from the Powertrain Control Module (PCM). This input is a filtered pulse width modulated signal, consisting of 4000 pulses per mile.

The vehicle speed offset from the actual vehicle speed may indicate a vehicle configured for non-American application.

A flashing vehicle speed display at high speeds may indicate a vehicle configured for non-North American (Export) application.