Operation

A) When the ignition is switched on, terminal 15 of the ignition control unit (0), as well as terminal 15 of ignition coil (M) are energized via a 1 £2 resistance.

B) When the engine is started, terminal 15 of ignition coil (M) is also energized by the ignition control unit via 1 f2 resistance and by terminal 16 of starter via 1,5 £2 resistance. Both resistances are connected in parallel with terminal 15 of the ignition coil which provides an effective total resistance of 0,6 i2.

As a result, the ignition coil receives a higher voltage during starting which in turn provides a stronger ignition spark.

C) During engine operation the current flows as described in Section A.

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