ELECTRIC CIRCUIT
5 - 14
CASE TRAINING CENTER
AUGUST 2000
3) Mode selector switch
a) When the ignition is switched on, "S" is selected by default (unless auto mode auto was selected when the
ignition was switched off)
b) Every time the travel mode switch (1) is pressed, the mode changes:
S ® H ® L ® S ® H
c) If the auto mode switch (2) is operated, the mode changes to auto mode. If the auto mode switch is pressed
again, the mode changes to "S" mode.
d) When auto mode is running, if the work mode switch (1) is pressed, the mode does not change.
e) If the ignition is switched off in auto mode, the mode stays in auto when the ignition is switched on again.
4) Operation
1. The mode switch signal (1 and 2) is managed by the main electronic control box (4) which changes the mode
in accordance with the input signal.
2. The electronic control box (4) transmits the selected mode to the control screen (LCD) via series communications
(9). The control screen shows the mode selected.
3. The main electronic control box (4) transmits the selected mode to the engine electronic control box (6) via CAN
communications which controls the electronic acceleration (7).
The engine electronic control box (6) transmits the mode and the data concerning the number of revolutions to the
main electronic control box (4) via CAN communications.
4. The main electronic control box (4) calculates the proportioning valve current (5) based on the mode selected and
the data concerning the real number of revolutions of the engine and the target number of revolutions.
5. The main electronic control box (4) transmits the new data to the display screen (LCD) via series communications.
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