On-Board Instruments; High And Medium Instrument Panels - Alfa Romeo 159 Training Material

ELECTRICAL
SYSTEM

9.3 ON-BOARD INSTRUMENTS

Three versions of the panel are available:
HIGH
MEDIUM
BASIC
A auxiliary instrument panel is inserted in the middle of the dashboard. Four auxiliary instrument panels are available:
Petrol instrument panel (HIGH panel version)
Petrol instrument panel (MEDIUM panel version)
Diesel instrument panel (HIGH panel version)
Diesel instrument panel (MEDIUM panel version)

9.3.1 HIGH and MEDIUM instrument panels

Two analogue dials (speedometer and rev counter) in instrument body.
Three analogue indicators in the auxiliary instrument panel.
15 warning lights + 5 spare warning light positions (diesel versions) or 13 warning lights + 7 spare warning
light positions (petrol versions).
One buzzer.
One light sensor for automatically adjusting instrument brightness (day/night mode).
Interface with 7 external buttons fitted on steering wheel stalks and left-hand panel: 'MODE', 'MODE +',
'MODE –', 'TRIP', 'TRIP up', 'TRIP down' and 'km'.
One monochromatic reconfigurable matrix LCD with two-colour (red/amber) area.
Additional heater (versions with automatic/robotised transmission only).
Outfit-specific HIGH and MEDIUM panel variants
Petrol and Diesel (differences concern rev counter scale).
Left-hand drive and right-hand drive (differences concern speedometer scale: in kilometres for left-hand drive
versions and in miles for right-hand drive versions).
Automatic/robotised transmission and manual transmission (differences concern presence of additional heater
on display).
Speedometer (HIGH, MEDIUM and BASIC versions)
The system calculates the real vehicle speed on the basis of values provided by sensors on the drive wheels and
according to the real circumference of the wheels provided by the on-board computer. The electronic architecture
implements a microprocessor.
The speedometer dial is operated by a stepper motor. The scale is appropriate for left-hand and right-hand drive
versions with a clockwise angle of 270°.
The instrument panel slightly increases the real speed for safety reasons without exceeding the maximum tolerance
allowed in countries where the car is marketed. The speed value ranges are uniform.
The real speed value is provided also in the event of failures to one or both drive wheel sensors.
The indicator will point to home range in the event of a failure to the vehicle speed sensor. The maximum full scale
value is 260 km/h for kilometre panels and 160 mph for mile panels.
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