Operation CHARM: Car repair manuals for everyone.
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Fuel Gauge

The PCM averages the fuel tank level reading from the fuel level sensor over time and will also average the value if a circuit fault were to occur. The PCM sends this averaged information to the BCM over the Class II link. The BCM averages the information for fuel tank sloshing (vehicle speed) and sends this averaged fuel level to the I/P cluster over the link. The I/P cluster then positions the gauge.