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Symptom Related Diagnostic Procedures|Page 2326 > < Symptom Related Diagnostic Procedures|Page 2324
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Standard Wave Pattern

Wave Pattern Observation Points

1. Check that the standard wave pattern appears when the idle air control motor is operating.

Point A:
Presence or absence of induced electromotive force from the motor turning. (Refer to abnormal wave pattern.)

Point B:
Height of coil back electromotive force

Examples of Abnormal Wave Patterns

Example 1

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Cause of problem

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