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Old 06-30-2009, 11:19 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Is the fuel gauge REALLY tied to the ABS system? How? Why?

I sporadically run into anecdotal evidence that the fuel gauge is tied to the ABS unit operation but I can't, for the life of me, understand why that would be.

When I look at the wiring diagrams for the Bosch 5.7 ABS system, I see no connection to the fuel gauge.

And, I don't see why wheel, yaw, steering angle, or brake-pedal and brake-pressure sensors that are tied to the ABS would have anything to do with the fuel gauge.

Yet, there is ample sporadic evidence that the fuel gauge sometimes goes haywire when the ABS system does.

How can that be?

What possible connection is there between the ABS and the fuel gauge?

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