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Normal Operation

WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle speed signal (VSS) is generated in the anti-lock brake system (ABS) and sent to the powertrain control module (PCM). The PCM transmits the VSS data to the instrument cluster over the communication network. If the instrument cluster fails to receive the VSS input from the PCM, the instrument cluster indicates 0 km/h (0 mph) on the speedometer.

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