The supply for the fan
N11
arrives
directly from the battery from the line for the VENT maxifuse of
B6
:
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
B25
.
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 (from pin 26)
to the relay
J30
which energizes the coil. The relay then
sends an earth which operates the fan
N11
.