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Wave pattern observation points

(Point): Condition of wave pattern build-up and' maximum voltage (Refer to abnormal wave pattern ex-
amplesand 2.)

Examples of abnormal wave: patterns

Example

Wave pattern during engine cranking

Cause of problem
Broken wire in ignition primary circuit
Wave pattern characteristics
Top-right partof the build-up sectioncannot beseen, and
voltage value is approximately 2V too low.

Example 2

Wave pattern during engine cranking
Cause of problem
Malfunction in power transistor
Wave pattern characteristics
Power voltage results when the power transistor is ON:

HARNESS INSPECTION

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