HV coil secondary check
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 diagno-
sis, check the peak voltage with the multimeter
adaptor.
Electric characteristic
Resistance value
High voltage coil secondary resistance value ~
2000 ± 300 ohm
Pick-Up.
- Disconnect the control unit connector and con-
nect the positive wire to connector No. 2 and the
negative wire to connector No. 8 (see figure).
- The multimeter end of a scale should be 200V.
Use the start-up system to run the engine and
measure the voltage produced by the Pick-Up.
- Replace the Pick-Up if non-conforming values
are measured.
N.B.
THE MULTIMETER MUST BE SELECTED TO DETECT
CONTINUOUS VOLTAGE.
Specific tooling
020409Y Multimeter adaptor - Peak voltage de-
tection
Electric characteristic
Voltage value
> 5 Volt
- HV 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 ground one and
the negative to the coil positive connector.
Electrical system B 125-250
ELE SYS - 90
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