An electronic management system supervises
and governs the operation of the AISIN automatic transmission.An electronic control unit manages a complex
operating logic which enables the transmission to be used either
in totally "assisted" conditions, typical of a conventional
automatic transmission, and in manual mode which allows sequential
engagement of the gears and a more sporty style of driving.The electronic control unit dialogues with
the engine management control unit via two dedicated lines (CAN),
and receives the engine rpm, fuel injection, throttle position and
engine temperature signals.Several sensors on the gearbox provide data
on its operation and on the oil temperature: the control unit calculates
the most suitable gear ratio and the locked condition of the hydrodynamic
torque converter, sending the appropriate commands to the solenoids,
also located on the gearbox;It also drives, when necessary, a gearbox
oil cooling fan.
For more details,
see DESCRIPTION AND OPERATION: 2135 AUTOMATIC TRANSMISSION
EXTERNAL CONTROLS
.
The system is also controlled by means of
two relays located in the engine compartment near the battery.The supply lines to the control unit and
the various system components (sensors and actuators) are protected
by a specific maxifuse and other jumper fuses located next to the
junction unit.