Speedometer & Tachometer
WARNING: This page is about a different car, the 2001 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
Speedometer, odometer and tachometer receive information from Powertrain Control Module (PCM) over Standard Corporate Protocol (SCP) network. See Figure . When speedometer does not receive a vehicle speed signal, display defaults to 0.0 MPH. Odometer records total vehicle mileage and is equipped with a trip meter that can be reset by pushing a button. If odometer does not receive information from PCM, display will show all dashes. Tachometer is electronically operated and indicates engine speed of 0-8000 RPM. Tachometer receives a signal through SCP network from PCM. If RPM information sent is invalid or missing, instrument cluster will default tachometer to 0.0 RPM.