The supply controlled by the ignition (INT)
for the instrument
E50
reaches pin 19 of connector A from
the line protected by fuse
F1
of the junction unit
B1
.
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.Pin 18 of connector A is earthed (electronic
earth).Pin 1 of connector B is earthed (power earth).
Pins 2 and 16 of connector A 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 18 of connector C from the earth signal coming from the sensor
K30
.
The signal from the sensor
K20
.
reaches pin 13 of connector C and lights up the brake pad wear warning
light.
Device
K32
measures the level of
the engine oil during starting: it receives a reference signal from
pin 14 of connector A of
E50
and sends a signal to pin 10.
Signals from handbrake switch
I40
and brake fluid level sensor
K25
. reach pin 11 of connector
A and pin 15 of connector C of
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
.
Pin 5 of connector B of
E50
receives
the 'doors open' signal coming from the integrated services control
unit
M40
, pin 7 of connector A
See E2510 COURTESY LIGHTS
The inertia switch
I50
intervention
signal reaches pin 3 of connector A of
E50
: under these
circumstances the instrument panel produces the appropriate signal.
The water in the filter sensor
K31
is supplied by the line for fuse
B41 See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
and
sends a signal to 7 of connector B of
E50
.
The speedometer sensor
K84
located
on the gearbox is supplied from the line of fuse
B41 See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
and
sends a signal to pin 5 of connector A of
E50
: this signal,
processed by the internal electronic device, operates the vehicle
speed indicator and the milometer and the output is available: from
pins 30, 31 and 32 of connector A for the engine management control
unit, the navigation system, the taxi-meter, etc.
The engine rpm signal arrives from the engine
management control unit
M10
at pin 6 of connector A of
E50
:
this signal, processed by the internal electronic device, operates
the rev counter.