Tire pressure control (rdc) – BMW 2006 bmw 325i User Manual

Page 86

Tire Pressure Control (RDC)

The concept

RDC monitors the tire pressures at all
four wheels, even when the vehicle is
moving. The system provides an alert
whenever the inflation pressure drops
significantly below the specified pres-
sure in one or more tires.

In order for the system to "learn" the
correct tire inflation pressure, check the
inflation pressure in all tires. Refer to
the table of "Tire inflation pressures"
(page

) and correct the pressures if

necessary. Then activate the system.

This indicator lamp in the instru-
ment cluster will inform you if
the tire pressure is not correct.

Activate the system

Depending on the type of equipment,
the switch either has the letters RDC on
it or the RDC-symbol.

1 Turn the ignition key to position 2

(do not start the engine).

2 Press the switch long enough for the

yellow indicator lamp in the instru-
ment cluster to light up for a few
seconds.

3 After a few minutes driving time, RDC

sets the current inflation pressure in
the tires as the target values to be
monitored.

You will only have to repeat this proce-
dure following a correction of the tire
inflation pressure. Otherwise, RDC
functions automatically when the igni-
tion key is in position 2, and thus oper-
ates whenever the vehicle is driven.

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In the event of loss in tire
pressure

If the inflation pressure has dropped
significantly over a long period of time
(which is normal for any tire), the indi-
cator lamp will come on with a yellow
lamp.

This alerts you to have the tires inflated
to the specified pressures as soon as
possible.

If you are prompted to check the
tire pressure shortly after a

correction has been made, this indi-
cates that the corrected values were
not accurate. Please check the inflation
pressure again and make corrections
according to the inflation pressure
table. Then activate the system once
again.