1998 BMW 740I ignition

82n
Digital clockTo enter the first activation timeBefore you can enter data, the ignition
key must be at position 1 and the digital
clock must be visible in the display.
1 Press the keys as shown in the
illustration
2 Press the SET key.
TIME 1 flashes in the display.
3 Use the – HRS + and – MIN + keys to
enter the correct time
4 Confirm your entry by pressing the
SET key.
An asterisk appears next to the time
and the LED to the right of the BC key
comes on.380us184
To enter the second activation
timeThe procedure is the same as that for
setting the first activation time, except
you will press TIME 2 for your selection.To correct the timeTo enter a different time, press the keys
in the sequence described for the first/
second activation times.Calling up a preselected time>For the first activation time, press the
keys in the sequence shown in the il-
lustration on the left
>For the second activation time, follow
the same key sequence and press
TIME 2 key for your selection.
Activating/deactivating
switch-on timesAfter pressing the digital-clock function
key, the entered activation times can be
activated and deactivated by pressing
the keys TIME 1 or TIME 2.
When active, the LED to the right of the
BC key comes on and an asterisk ap-
pears at the left next to the time.
The times remain stored until they are
replaced by subsequent entries.

83n
RepairsIndexOverview Controls Car care Technology Data
Digital clockVentilation modeDuring ventilation, the LED to the right
of the BC key flashes and AIR OFF ap-
pears in the display. Pressing this key
switches off the ventilation mode and
the LED goes out.
When a preselected activation
time is set, the independent venti-
lation system is operational at outside
temperatures above 607 (166), or by
direct switch activation. It cannot be
switched on when the vehicle is mov-
ing.<
Direct controlAvailable only with ignition key at posi-
tion 1.
Press the keys (AIR ON/AIR OFF) in the
sequence shown in the illustration.380us185

88n
Onboard computerCodeYou can program a code into the on-
board computer for supplementary pro-
tection against unauthorized attempts
to start the engine or tamper with the
vehicle. This feature provides you with
an extra measure of security extending
beyond that furnished by the vehicle im-
mobilization system (refer to page 31).
The system prevents the engine from
starting.
A code number is used to arm the sys-
tem. The code is then required for sub-
sequent starting attempts. Therefore:
Always remember the code number.
With the ignition key in position 1, press
the keys in the sequence shown in the
illustration.
"CODE – – – –" will appear in the dis-
play.380us687
Turn the ignition key to position 1
to set1 Use the 0 – 9 keys to enter the code
2 Press the SET key
3 Turn the ignition key to position 0 or
remove it.
If you press a different key of the on-
board computer before you turn the ig-
nition key to the 0 position, or if you turn
the key to position 2, the code which
has been entered will be deleted.
Code numbers from "0000" to "9999"
can be entered.
The code must be re-entered each time
the system is armed.
You can make corrections of the en-
tered numbers with the CLR key.380us688
To cancel with the ignition key at
position 1 or 2A gong and the "CODE – – – –" display
prompt the code entry.
1 Use the keys to enter the code
number
2 Press the SET key.
The system responds to attempts to
start the vehicle using an incorrect/no
code by preventing the engine from
starting.
The time automatically appears after
you enter the correct code and then
confirm it by pressing SET.
Three incorrect entries will cause the
alarm to sound for 30 seconds.

92n
ASC+T/DSC
*
Automatic Stability Control plus
Traction (ASC+T)/Dynamic
Stability Control (DSC)
*
These systems help provide additional
dynamic stability, particularly when ac-
celerating and cornering.
The DSC system enhances the benefits
of the ASC+T. In addition to optimizing
vehicle stability and traction when ac-
celerating or starting from a standstill,
another benefit is realized in cornering
stability. Of course, this is subject to the
limits imposed by the laws of physics.
The system activates automatically
each time you start the engine.380de621
Indicator lamp
The indicator light in the instru-
ment cluster goes out shortly af-
ter you switch on the ignition.
Refer to page 21.
Indicator lamp flashes:
The system is actively regulating drive
torque in response to monitored vehicle
operating conditions.
If the indicator lamp fails to go out after
the engine is started, or if it comes on
during normal driving:
If the system has not been deactivated,
there is a system malfunction. The vehi-
cle remains operational, but without
ASC+T/DSC. Consult your authorized
BMW center for repair.
To deactivate the systemPress the button. The indicator lamp
will come on.
Depending on equipment options, the
button is marked with ASC or DSC.
With deactivated ASC+T/DSC you are
driving with conventional, unregulated
torque transfer.
We recommend that you deactivate the
system for increased traction:
>When rocking the vehicle or starting
off in deep snow or on loose surfaces
>or when driving with snow chains.
Refer also to page 129.To reactivate the systemPress the button again; the indicator
lamp goes out.
The laws of physics cannot be re-
pealed, even with ASC+T/DSC.
Any consequences arising from traction
loss due to excessive vehicle speed re-
main the responsibility of the driver. For
this reason, do not take risks, using the
additional safety margin provided by the
system as an excuse.<
For additional details concerning
ASC+T/DSC, please refer to the chap-
ter describing "Advanced technology"
on page 185.

93n
RepairsIndexOverview Controls Car care Technology Data
Electronic Damper Control (EDC)
*
The system automatically ensures
damping of the running gear on de-
mand and thus increases comfort and
driving safety.Automatic adaptationAutomatic adaptation is activated after
every engine start. It can be maintained
throughout the entire vehicle speed
range and for all load conditions. If op-
erating parameters (road-surface qual-
ity, driving conditions such as steering,
braking, others) change, the damping
system adapts automatically to the new
factors in fractions of a second.380de620
Sport programWith the ignition key in position 2, press
the EDC button (arrow). The indicator
lamp next to the S comes on.
The Sport program should be invoked
when you wish to have strictly perfor-
mance-oriented tuning of the running
gear under all operating conditions.
To switch to automatic adaptation:
Press the button again; the indicator
lamp goes out.

94n
Tire Pressure Control (RDC)
*
The conceptRDC 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 RDC to "learn" the cor-
rect tire inflation pressure, check the in-
flation pressure in all tires. Refer to the
table of "Tire inflation pressures" on
page 26 and make corrections if neces-
sary. Then activate the system.
The Check Control will inform you if the
tire pressure is not correct.
Activate the system1 Turn the ignition key to position 2
(do not start the engine)
2 Press and hold the button (arrow) un-
til the message "SET TIRE PRES-
SURE" appears in the Check Control
3 After you have driven for a few min-
utes, the RDC will import the current
inflation pressure in the tires as the
target values which the system will
monitor.
You will only have to repeat this proce-
dure if the tire inflation pressure must
be corrected. Otherwise, the RDC func-
tions automatically when the ignition
key is in position 2, and thus operates
whenever the vehicle is driven.380de658
Loss of tire pressureIf, after a certain period of time, the air
pressure has gone down significantly
(which is normal for any tire), the mes-
sage "CHECK TIRE PRESSURE" ap-
pears in the Check Control.
This alerts you that you should have the
tires inflated to the specified pressures
as soon as possible.
If you are prompted to check the
tire pressure shortly after a cor-
rection has been made, this indicates
that the corrected values were not ac-
curate. Please check the inflation pres-
sure again and make corrections ac-
cording to the inflation pressure table.<

96n
Parking lamps/Low beams Instrument panel lightingSide lamps (side marker lamps)
With the switch in this position,
vehicle lighting is illuminated on
both sides. For lighting on one
side while parking, refer to page 97.
Low beams/Xenon lamps
*
When you switch the ignition off
with the low beam headlamps
on, only the side lamps (side
marker lamps) will remain on.
When the low beams are switched on,
the interior door handles are lighted.
The brightness is controlled by the in-
strument panel lighting.
380de034
You can adjust the "Follow-Me-
Home" function: The low beams
will then remain on for a brief period af-
ter you park the vehicle if you actuate
the headlamp flasher.<
Xenon lamps
*
For additional details, refer to page 190."LIGHTS ON" warningIn ignition key position 0, a message
appears in the Check Control after the
driver's door is opened if the head-
lamps have not been switched off
.
Daytime-driving light switch
*
The headlamps are automatically
switched on for daylight driving at igni-
tion key position 2.
Turn the rotary dial to adjust the illumi-
nation intensity.380us036

97n
RepairsIndexOverview Controls Car care Technology Data
High beams/Parking lampsFog lamps Interior lamps1 High beam
(blue indicator lamp)
2 Headlamp flasher
(blue indicator lamp)
3 Parking lamp
(not released at this time)Parking lamp, left or right
*
With the ignition key in position 0, en-
gage the lever in the appropriate turn-
signal position.380de629
Front fog lamps
A green indicator light appears in
the instrument cluster to indicate
that the front fog lamps are on.
If the high beam is switched on, the fog
lamps go out.
380us037
The interior lamps operate automati-
cally.Switching interior lamps on
and offPress the button (arrow).
If you want the interior lamps to remain
off continuously, maintain pressure on
the button for approximately 3 seconds.
Press the button briefly to revert to nor-
mal operation.
The orientation lamps on the right and
left of the button for interior lamps
come on when the side lamps are
switched on.380us640