BMW SERIE 3 CONVERTIBLE 2000 Bedienungshandbuch PDF herunterladen (Seite 178)

178n

Self-diagnostics

All of the important electrical and elec-

tronic systems in the vehicle are tested

regularly and automatically; the driver

does not have to perform any extra

operations or adjustments.

The indicator lamps come on briefly

when the ignition is switched on.

While you are driving, the functional

status of the actuator motors (for the

windshield wipers, power windows,

seats, etc.) is constantly analyzed by

current measurements in their relays.

46cde052

In the same manner, the electrical re-

sistance of the airbag ignition genera-

tors and all of the remaining airbag

components is measured at all times.

Any fault in this system would be de-

tected immediately by a current fluctua-

tion that would necessarily accompany

it. The fault would be indicated immedi-

ately by the airbag warning lamp.

Even after you shut off the engine, the

overall functional status of your vehicle

is being monitored. For example, all of

the flaps for the heating and ventilation

system travel to the nearest limit posi-

tion. This action ensures that in any

case, the defrosting function will remain

intact, even if a malfunction in the auto-

matic climate control should occur dur-

ing the night while the vehicle is parked.

A calibration cycle runs every tenth time

the engine is shut off. During this cycle,

the actuator motors of all the heating

and ventilation flaps travel to their limit

stops in both directions. The limit posi-

tions and the return travel paths are

checked in this manner in order to en-

sure that appropriate adjustments for

the operating elements can be made at

any time.

The sounds the automatic climate con-

trol makes as it carries out its self-diag-

nostics are noticeable because of the

noise that the ventilation flaps make af-

ter the ignition has been switched off.

All of the other self-diagnostics func-

tions operate silently in the back-

ground.

Any possible defects detected during

these self-diagnostics can be read out

by your BMW center and quickly cor-

rected during the vehicle's next regu-

larly scheduled maintenance.

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