Multimeter
2.2 Failure Diagnosis
Spark plug fails to jump.
Reason（in compliance with the following order）
① The inner resistance is too small and it should be tested
by required tester.
② Low rotation speed of the bent axle.
③ Tester is interfered. (It is normal that several measured
voltage is above the basic standard.).
④ Poor contact wire for the ignition system.
⑤ Bad ignition coil.
⑥ Bad charging coils (measure at maximum voltage).
No or interrupted high voltage electricity
① Wrong connection with the tester.
② Bad main switch.
③ Bad connector of the CDI group.
④ Poor contact of the CDI group or GND of the CDI
group is short-circuit.
⑤ Bad charging coil (measure at maximum voltage) .
⑥ Bad trigger（measure at maximum voltage）.
⑦ Bad high tension electricity connector.
⑧ Bad CDI group (when there is no spark for the plug or
①-⑦ is abnormal).
Normal high voltage electricity/no spark for the
plug
① Bad plug or secondary ignition coil leakage.
② Bad ignition coil.
No high voltage electricity
① The inner resistance is too small and should be tested by
required tester.
② Low rotation speed of the bent axle.
③ Tester is interfered. (It is normal that several measured
voltage is above the basic standard.).
④ Bad charging coil（①-③ are normal）.
No or interrupted high tension electricity
① Bad ignition coil.
② Bad charging coil.
Low high voltage electricity
① The inner resistance is too small and should be tested by
required tester.
② Low rotation speed of the bent axle (It is normal that
several measured voltage is above the basic standard.)
③ Tester is interfered.
④ Bad trigger（①-③ are normal）.
No or interrupted high voltage electricity
① Bad ignition coil.
② Bad trigger
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