Iveco DAILY M.Y. 2012, Body Builder Instructions

Page: 181 / 252

SPECIAL INSTRUCTIONS FOR ELECTRONIC SUBSYSTEMS
5-27
D
AILY
Printed 603.95.241 Base - 02/2012
Electrical system: modifications and drawing-off power
The negative leads connected to a ground point in the system must be as short as possible and must be connected to each other
in ”star” formation, while tightening most be done in an orderly and adequate manner.
As far as electronic components are concerned, the following instructions shall also be followed:
- the electronic control units shall be connected to the system ground when they are equipped with metal cases;
- the negative cables of the electronic control units shall be connected both to a system ground point, connected to the negative
terminal of the battery;
- the analog grounds (sensor) shall feature very good conductivity, though they are not connected to the system ground/negative
terminal of the battery. As a result, the greatest care shall be taken with the cable terminal stray resistance: oxidation, seaming
defects, etc.;
- the screened circuit metal sheath shall come into electric contact only at the end facing the control unit into which the signal
is fed;
- if junction connectors are available, the unscreened length ”d” next to the same shall be as short as possible;
- the cables shall be laid in such a way that they are parallel to the reference plane, i.e. as near the chassis/body structure as possible.
Figure 5.21
Metal-braid screening of a cable to an electronic component
114077
”Y” or ”X” connection of various negatives with the system ground