Repair manual

8
INTRODUCTION
F3C CURSOR ENGINES
Base - May 2007 Print P2D32C005 E
Bonding and screening
Negative leads connected to a system bonded point must be both as short and possible and “star“-connected to each other, trying
then to have their centering tidily and properly made (Figure 1, re. M).
Further, following warnings are to be compulsorily observed for electronic components:
- Electronic central units must be connected to system bonding when they are provided with a metallic shell.
- Electronic central units negative cables must be connected both to a system bonding point such as the dashboard opening
bonding (avoiding “serial“ or “chain“ connections), and to battery negative terminal.
- Analog bonding (sensors), although not connected to battery negative system/terminal bonding, must have optimal isolation.
Consequently, particularly considered must be parasitic resistances i n lugs: oxidising, clinching defects, etc.
- Screened circuits braiding must only electrically contact the end towards the central unit entered by the signal (Figure 2).
- If junction connectors are present, unscreened section d, near them, must be as short as possible (Figure 2).
- Cables must be arranged such as to result to be parallel to reference plane, i.e. as close as possible to chassis/body structure.
1. NEGATIVE CABLES “STAR“ CONNECTION TO SYSTEM BONDING M
2. SCREENING THROUGH METALLIC BRAIDING OF A CABLE TO AN ELECTRONIC COMPONENT — C. CONNECTOR
d. DISTANCE ! 0
88039
Figure 1
Figure 2