3023416 - E4010 INSTRUMENT PANEL - Description
Description
The gauges and warning lights which
form the instrument panel are grouped in a single instrument containing:
- electronic speedometer
- electronic rev counter
- coolant temperature gauge, with overheating warning light
- fuel gauge, with reserve warning light
- warning lights.
Depending on the version, the instrument
panel is supplied in two models:
- 'LOW', fitted with: two LCD displays: one for the odometer,
indication of the headlamp adjustmer, etc., the other for the clock,
external temperature, etc.
- 'HIGH' version with the second LCD display, is of the
active matrix type; also contains information relating to the trip
computer etc.
The instrument panel is a node on the CAN
network through which it exchanges information with the Body Computer
and the other electronic units.Speedometer: the function displays the vehicle
speed on the instrument panel: this information comes from the ABS
control unit, via the Body Computer.Engine rpm: the function displays the engine
rpm on the instrument panel, via the message sent on the CAN network
from the engine management control unit.Odometer: this function displays and memorises
the total mileage counter and trip recorder: the distance travelled
information is processed by the Body Computer via a counter; the
specific button located on the panel beside the steering wheel resets
the trip recorder.Fuel gauge: the Body Computer receives the
signal from the sensor integrated in the pump unit in the fuel tank
and processes it so as to ensure appropriate filtering / damping
to the instrument panel gauge, and also controls the lighting up
of the 'reserve' warning light.Engine water temperature: the function displays
the water temperature on the instrument panel and lights up the
water overheating warning light by means of the messages sent via the
CAN network from the engine management control unit.Minimum engine oil pressure: the function
lights up the minimum oil pressure warning light on the instrument
panel via the message sent on the CAN network from the engine management
control unit.Brake pad wear: the function lights up the
specific warning light: the Body Computer detects the state of the
brake pad wear associated with the presence of braking (signal from
the brake pedal) which is prolonged (intermittent indications are
ignored).Inertial switch state: the instrument panel
receives a signal from the switch, lights up the relevant warning
light and communicates the activation to the other nodes via the
CAN network.Driver's seat belt not fastened: the instrument
panel receives a signal from the seat belt unfastened switch and
lights up the relevant warning light.Handbrake on: the warning light relating
to the handbrake state is controlled by the specific switch; in
addition, if this signal is associated with a particular speed threshold being
surpassed, an acoustic signal is activated: the signal is sent via
the CAN from the Body Computer. Low brake fluid: the function lights up
the 'low brake fluid level' warning light on the instrument panel:
the signal is sent via the CAN from the Body Computer.Other warning lights are located
on the instrument panel, but managed directly by other electronic
units:
- Air Bag failure warning light;
- passenger Air Bag disablement warning light;
- i.e. failure warning light (EOBD)
For the 'HIGH' instrument panel, the active
matrix LCD display also displays some commands or messages relating
to the use of the radio, telephone
See E3570 INTEGRATED RADIO PHONE
or
navigator
See E4091 CONNECT
coming from
the integrated radio-telephone-navigator.
For more details
Characteristic of working principle 5560 INSTRUMENT PANEL
.
This diagram illustrates the operation
of the warning lights not contained in other functions; the others
are described and illustrated in the diagrams of the components
to which they refer: