A control system called SELESPEED supervises
and governs the operation of the manual gearbox via an electrohydraulic
device.An electronic control unit manages a complex
operating logic which enables the gearbox to be used in both 'semi-automatic'
conditions, in which the driver manages the engagement of the gears
using the lever or the two steering wheel buttons, and automatic
'CITY' mode which delegates gear change management to the electronic
system.The electronic control unit dialogues with
the engine management control unit via two dedicated lines (CAN),
and receives the rpm, engine torque and engine temperature signals.The control unit drives, by means of a complex
operating logic, an electrohydraulic unit located on the gearbox,
via a specific electric pump.
For greater detail, see
Characteristic of working principle 2127 ELECTRO-HYDRAULIC SELECTION.
GEARBOX EXTERNAL. CONTROLS
.
The system is also controlled by means of
two relays located near the control unit.The supply lines to the control unit and
the various system components (sensors and actuators) are protected
by two specific maxifuses and other jumper fuses, located next to
the junction unit.