Ignition circuit
1) Check the state of the spark plug (clean it with
a metallic brush, remove all incrustations, blow it
with compressed air, and replace it if necessary).
2) Without removing the stator, perform the checks
described below:
After a visual inspection of the electrical connec-
tions, carry out the measurements on the charging
coil and pick-up (see table), and check for con-
tinuity using the special tester, 020331Y.
If the continuity checks or the inspections on the
coil and pick-up are incorrect, proceed by replac-
ing the stator, otherwise replace the ECU.
Remember to detach the ECU wirings when the
engine is not running.
Specific tooling
020331Y Digital multimeter
PICK - UP CHECK (FIGURE A)
Specification
Desc./Quantity
1 Red cable (1) and White cable (2) 90 ÷ 140 Ohm
RECHARGING COIL CHECK (FIGURE B)
Specification
Desc./Quantity
1 Red cable (3) and Green cable (4) 800 ÷ 1100 Ohm
CONTINUITY CHECK
Specification
Desc./Quantity
1 White cable - Engine Continuity
2 White cable - Frame Continuity
Voltage regulator check
Voltage regulator
A fault in the voltage regulator can cause the fol-
lowing problems depending on the type of fault:
1) Blow out of the lighting system bulbs.
2) Failure of the lighting system.
3) Excessive battery charging (blowing of main
fuse).
4) Battery recharging failure.
5) Failure of the turn indicators.
Vespa LX 50 Electrical system
ELE SYS - 51
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