The electronic device inside the steering
column switch unit
H5
and the controls on the right lever
are supplied at pin 11 of connector A by the line 'controlled by
the ignition' (INT/A) of the relay T12 protected by the fuse F43,
both housed in the underdashboard control unit
B2
.
The electronic section of the steering column
switch unit
H5
which manages the rearscreen wiper function
is supplied at pin 2 of connector C from the same line 'controlled
by the ignition' (INT/A) for the relay T12 protected by the fuse
F52, housed in the underdashboard control unit
B2
.
Pin 7 of connector A and pin 5 of connector
C of
H5
are earthed.
When the rearscreen wiper function is switched
on, the steering column switch unit
H5
sends the control
signal to the rearscreen wiper motor
N16
from pin 3 of connector
C; pin 4, on the other hand, receives the earth signal coming from
the motor end of travel cam which stops the operation.
The motor
N16
is then earthed.
The windscreen/rearscreen washer switch,
when operated, sends two signals from pins 10 and 12 of connector
A which operate the windscreen/rearscreen washer pump
N22
directly.
Pin 3 of connector A receives the automatic
rearscreen wiper activation signal coming from the Body Computer
M1
,
pin 1 of connector A
See E2022 REVERSING LIGHTS
.
Functional description
When the rearscreen is open, an earth signal
leaves the actuator
N67 for pin 4 of connector A of H5 so that
the electronic device for the steering column switch unit H5 which manages
the rearscreen wiper function inhibits the operation of the actual
rearscreen wiper.