3315689 - E4090 NAVIGATOR - Functional description
Functional description
ICS display
E60
displays the navigator
and on-board computer functions.
The navigation system is controlled by a
special navigator control unit
M90
.
The on-board computer function is performed
by the electronic circuitry of display
E60
, which receives
the necessary information from other devices on the car.
Navigator control unit
M90
is supplied
directly by the battery. (maxifuse CENTR of
B5
) - to pin
14 - through fuse F18 of junction unit
B1
.
Pin 1 of
M90
is earthed.
Pin 3 receives a speedometer signal from
instrument
E50
- pin 6 of connector B.
Pin 4 receives a reverse engagement signal
(see
See E2022 REVERSING LIGHTS
).
Control unit M90 communicates with
the ICS display E60 via numerous lines:
- pin 2 receives an ignition signal;
- pins 8, 9, 10, 22 and 23 control screen signals;
- pins 13 and 26 handle audio signals;
- all the other information is exchanged by serial lines
leading from pins 5 and 7.
Control unit
M90
is equipped with
a self-diagnostic system that can be used by connecting the unit
to connector
R10
. The unit receives signals from the serial
connection line between control unit
M90
and ICS display
E60
,
which is connected - pin 1 of connector B - to
R10
.
The on-board computer function is performed
by the electronic system of display
E60
, which processes
information form the various systems and the climate control unit
H80
.
Direct power line from the battery. (maxifuse
CENTR of
B5
) through fuse
F18
of junction unit
B1
and
supplies ICS display
E60
- to pins 13 and 26 of connector
A.
Ignition-operated power supply (INT/A) reaches
pin 2 of connector B of ICS display
E60
through fuse
F5
of junction unit
B1
.
Another ignition-operated supply (15/54)
reaches pin 3 of connector B of
E60
through fuse
F7
of
junction unit
B1
.
Climate control system
H80 and ICS display
E60 are connected from pin 6 of H80 to pin 15 of connector B of
E60 via a special serial connection line.
Pin 8 of climate control unit
H80 receives
a speedometer signal from instrument E50 - pin 6 of connector B.
The same signal is also directed to display E60 - pin 24 of connector
A.
Pins 4 and 3 of climate control unit
H80
receives signals from fuel level measuring device N40, that are
processed to compute fuel consumption.
(this involves the same
signals for the gauge in the instrument panel (
See E4010 INSTRUMENT PANEL
).
Pin 23 of connector A of
E60
receives
a fuel consumption signal if engine management unit
M10
allows for it.