Mirage L4-1795cc 1.8L SOHC (1994)
Wave Pattern Observation Points
Point : Condition of wave pattern build-up section and maximum voltage (Refer to abnormal wave pattern examples 1 and 2.)
Examples Of Abnormal Wave Patterns
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Example 1
Wave pattern during engine cranking.
Cause of problem
Open-circuit in ignition primary circuit.
Wave pattern characteristics
Top-right part of the build-up section can not be seen, and voltage value is approximately 2V too low.
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Example 2
Wave pattern during engine cranking
Cause of problem
Malfunction in ignition power transistor
Wave pattern characteristics
Power voltage results when the ignition power transistor is ON.
