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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 254 (Information Center - Instrumentation, Message Center, And Warning Chimes) >> Description And Operation >> Instrument Panel Cluster (IPC) >> System Operation >> Speedometer

System Operation: Speedometer

WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

The PCM  calculates the vehicle speed from the transaxle OSS sensor input and from the tire size and axle ratio configuration in the PCM  VID block. The PCM  provides the IPC  with a vehicle speed data message to command the speedometer pointer.

The IPC  provides a tolerance which allows the gauge to display between 3% lower and 7% higher than the actual vehicle speed. This means that with an actual vehicle speed of 96.6 kmh (60 mph), the speedometer may indicate between 93.7 kmh (58.2 mph) and 103.3 kmh (64.2 mph), which is normal.

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