WORKSHOP MANUAL
MPV 320W / 520W
Chapter
7 - ELECTRICAL SYSTEM
EDITION
2017
PAGE
48 /
64
7.1 TROUBLESHOOTING
7.1.1 Electrical system problem table
Below are some of the most common problems connected to the malfunctioning of the electrical
system are shown, with their probable cause and the remedial action to be taken.
Summary
7.1 TROUBLESHOOTING .........................................................................48
7.1.1 Electrical system problem table ....................................................48
7.1.2 Safety device intervention table ....................................................49
7.1.4 Electrical measure gauges ...........................................................50
7.1.5 Electrical measurements ..............................................................51
7.2 SYSTEM AND COMPONENT DESCRIPTIONS .................................52
7.2.5 Solenoids and Relays ...................................................................57
7.2.7 Relay and Fuse operating faults ....................................................59
7.2.8 Diodes and Rectifiers ...................................................................59
7.2.9 Electromagnetic clutch .................................................................60
7.3 FUNCTIONAL CHECKS ......................................................................61
7.3.1 General system checks ................................................................61
7.3.2 Checking the components ............................................................61
7.4 ELECTRICAL WIRING DIAGRAMS ....................................................63
7 - ELECTRICAL SYSTEM
PROBLEM
CAUSE
REMEDY
Engine does not start
The ignition consent conditions
have not been complied with
Comply with all consent conditions and all the mi-
croswitches
[
-
[
Low battery
Recharge the battery
[
Uncertain battery cable con-
nections
Check and clean the terminals
[
Uncertain spark plug
connections or faulty spark
plugs
Check and replace
Electromagnetic clutch
malfunction
The operator is absent
Comply with the consent conditions
[
The operator present switch is
faulty
Check and replace
[
Faulty switch, diode or clutch
Check the components
[
-
[
-
[
and replace them