Lancer Sportback L4-2.4L (4B12) (2010)
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Terminal No. 20 for the number 3 cylinder.
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Terminal No. 21 for the number 4 cylinder.
Wave Pattern Observation Points
Point: The power transistor control signal (ignition timing) is advanced when the engine speed is increased.
Examples of Abnormal Wave Patterns
Example 1 (Wave pattern during engine cranking)
Cause of problem
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Open-circuit in ignition primary circuit