Disconnect the spark plug cap from the HV cable and measure the resistance between the HV cable
terminal and the HV coil negative terminal (see figure). If non-conforming values are measured, replace
the HV coil. To carry out a more complete diagnosis, check the peak voltage with the multimeter adaptor.
Electric characteristic
High voltage coil secondary resistance value
High voltage coil secondary resistance value: ~ 3000 ± 300 Ohm
- Pick-Up.
Disconnect the control unit connector and connect
the positive wire to connector No. 11 and the neg-
ative wire to connector No. 9 (see figure).
Use the start-up system to run the engine and
measure the voltage produced by the Pick-Up.
Replace Pick-Up if non-conforming values are
measured.
Electric characteristic
Pick-Up voltage value
Pick-Up voltage value: > 2 Volt
- H.V. coil
With the control unit and HV coil connected, meas-
ure the voltage of the coil primary during the start-
up test with the voltage peak adaptor and con-
necting the positive terminal to the earth one and
the negative to the coil positive connector.
If non-conforming values are measured, replace
the control unit.
N.B.
THE PLASTIC CAP OF THE POSITIVE TERMI-
NAL ON THE HV COIL PRIMARY IS BLACK
AND THE NEGATIVE TERMINAL ONE IS
GREEN.
Electric characteristic
High voltage coil voltage value
Electrical system MP3 125
ELE SYS - 16
To Next Page
Loading...
