The supply for fan
N11
arrives directly
from the battery from the line for the maxifuse FAN 1 of
B99
:
the fan therefore works when it receives an earth command.
The relay
J30
has a coil supplied
directly by the line controlled by the ignition (15/54) protected
by fuse
F4
of the additional fuse box
B98A
.
It is energized by an earth signal coming
from the engine control unit
M10
.
If the engine coolant reaches a high temperature,
the control unit
M10
sends an earth signal to the relay
J30
which
energizes the coil. The relay then sends an earth which operates
the fan
N11
.