The supply controlled by the ignition (INT)
for the instrument
E50
reaches pin 2 of connector A from
the line protected by fuse
F1
of the junction unit
B1
.
Pins 3 and 4 of connector A are earthed.
The instrument
E50
is also supplied
directly by the battery - pin 1 of connector A - via the line for
the maxifuse
J/B1
of
B5
protected by fuse
F10
of the junction unit
B1
(supply for internal clock).
Pins 4 and 5 of connector B receive signals
coming from the fuel gauge, located in the electric pump unit
N40
:
these signals, processed by the internal electronic device, operate the
fuel gauge and the reserve warning light.
Insufficient engine oil pressure is signalled
to pin 2 of connector C from the earth signal coming from the sensor
K30
.
The signal from the sensor
K20
reaches
pin 5 of connector C and lights up the brake pad wear warning light.
Switch
I45
signals the failed insertion
of the seat belt in the special housing and lights up the appropriate
warning light (function only present on some right hand drive markets).
Signals from handbrake switch
I40
and brake fluid level sensor
K25
. reach pin 8 of connector
B and pin 13 of connector C for
E50
, respectively and light
up the insufficient brake fluid level/handbrake warning light. The
same warning light is on - together with the ABS failure warning
light - if the ABS control unit detects problems involving the EBD
function (
See E7020 ABS
).
The speedometer sensor
K84
, located
on the gearbox, sends signals to the instrument panel
E50
to pins 8 and 9 of connector C: these signals, processed by the
internal electronic device, operate the vehicle speed indicator
and the milometer and the output is available: from pin 10 of connector
C for the engine management control unit (
See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
or
See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
),
from pin 3 of connector B for the navigation system control unit
(
See E4090 NAVIGATOR
).