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Old 09-25-2005, 11:54 AM   #7
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Join Date: Jul 2005
Location: Austin, TX
Posts: 22
Quote:
Originally Posted by SD987
The tire pressure monitoring system (RDK) uses a 433 mhz radio transmitter to relay pressures from each of the four wheels to a processor, which is then integrated into the display. I assume it can be checked using the OBC stalk control.
Interesting our 2006 BMW 530i tire pressure monitoring system monitors the RPMs of each of the four wheels. When one of the wheel's rpms drops due to a change in rolling radius (relative to the others), it indicates a tire pressure drop and the alarm light comes on.

This is a very practical method for monitoring tire pressure change since RPMs at each wheel are monitored anyway for ABS.

Surprised other mfgrs do this any differently.

Best regards,
Gordie
Austin, TX
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