APRILIA ATLANTIC 125 Workshop Manual page 202

ELECTRICAL SYSTEM
TEST READINGS
Ignition coil test
Test the coil using a portable multimeter. Check for
continuity of the primary and secondary windings. The
resistance readings found need not match standard values
exactly. If the windings are in good working order, resistance
readings should approximate the standard values.
Coil winding resistance
Primary
Secondary
Warning: Disconnect the spark plug cap before measuring.
Pick-up test
•
Disconnect the pick-up connector.
•
Measure resistance across the terminals of the
yellow/blue and yellow/green wires using a multimeter
set to the 1000 Ohm range. Correct reading is 105
Ohm ± 10% (at 20 °C).
•
Replace the pick-up when detected reading indicates
infinite resistance or is below the specified range.
CDI CONTROL UNIT test
This is a capacitive discharge control unit with digital spark
advance control based on engine rpm. The control unit is
fitted with two connectors. The eight-pin connector is in use.
Pin-out
1. Direction indicator control
2. Not connected
3. Ignition coil control
4. Not connected
5. +15 input
6. Pick-up input
7. Starter control
8. Ground
TEST READINGS
Starter relay test
To test relay operation:
•
Feed 12 Volts to the two male terminals (85 - 86).
•
Check for continuity between the other two terminals
(87 – 30) using a multimeter set to the Ohm range.
Correct reading when relay is fed: 0 ohm
Correct reading when relay is not fed: ∞ ohm
Replace the relay if the readings obtained deviate from those
specified.
8 - 8
0.2 ohm ± 10%
2.9 Kohm ± 10%
ATLANTIC 125 - 200