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Ignition System - NIPPONDENSO Electronic: Testing: Notes

CAUTION: The following precautions should be observed while servicing or testing a Nippondenso ignition system.
  • Ensure all connections are correct, reverse battery polarity may damage igniter (ignition control unit).
  • DO NOT  disconnect battery while engine is running or transistors may be damaged.
  • If a tachometer is connected to system, connect tachometer positive lead to coil negative terminal.
  • Be careful when checking systems, as variations may occur between models. Connectors and wire colors also may vary.
  • Illustrations, may not apply totally to all models.
  • DO NOT  allow water to enter igniter.