Installer's handbook - 1/3 Types of installation - 2/3 Software guide ...

everything). If available, use always
the suitable fixing bracket.
Avoid too hot areas or subjected
to high thermal radiation. Even
though the ECU is waterproof,
avoid installing it in areas subjected
to continuos dripping water in case
of rain, so that the water does not
penetrate and stagnate in the harness
or sheaths.
No adjustment is programmed
on the ECU; it is therefore not
important it is easily accessible. It is
more important, instead, that the
cable going from the ECU with the
computer connection is placed in a
very accessible area and protected
by the cap from possible water infiltration.
5.13 CHANGE-OVER
SWITCH
Choose an easily accessible
and visible place for the driver and
fix the device with the screws supplied.
Substituting the label with the
spare one, the changeover switch
can also be installed in vertical
position. Eliminating the external
body, the changeover switch can be
directly built in the vehicle’s dashboard
using the special tool to drill,
code 90AV99000043.
Specific built-in changeover
switches are also available for
every single vehicle; they are to be
positioned in place of the original
switch-cover plates. Please refer to
the price list in force to know the
available models.
Make anyway sure it is always a
specific changeover switch in the
two-position version with buzzer.
5.14 HARNESS
The harness of the Sequent
system guarantees the correct transmission
of every inlet and outlet
signal of the ECU. From a “mechanical”
point of view, it is recommended
to place the harness very carefully
and to avoid forcing on the
connections (never pull the wires to
let the connector go through a hole
or to disconnect it!!!). Avoid making
too remarked folds, too strong
clamping, sliding against moving
parts, etc. Avoid certain pieces of
wires from being too stretched
when the engine is under stress.
Fix opportunely the pieces of wire
near the connectors, to prevent
their dangling from wearing them
out in the future. Avoid any contact
with sharp edges (burr the hole
rims and mount some wire-leads).
Avoid placing the wires of the
Sequent system too close to the
spark plug cables or to other parts
subjected to high voltage.
Each connector is polarised, for
this reason it is fitted without stress
only in the right direction.
Important: all not pre-cabled
connections should be carried out
through electric brazing (soft soldering)
and opportunely insulated.
The soldering should not be “cold”
and should not risk coming off in
the future. Any unused wire of the
harness should be shortened and
separately insulated. Never use
welders that are connected to the
battery of the same vehicle, or welders
of the quick type.
5.15 INSTALLATION TYPES
For various mechanical and
electrical installation types, please
refer to the specific handbook
2/3.
36
Picture 29
ECU installation in
the engine
compartment