Montero V6-3.8L SOHC (2005)
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
Example 1 (Wave pattern during engine cranking)
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Cause of problem
Open-circuit in ignition primary circuit
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Wave pattern characteristics
Top-right part of the build-up section cannot be seen, and voltage value is approximately 2 volts too low.
Example 2 (Wave pattern during engine cranking)
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Cause of problem
Malfunction in ignition power transistor
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Wave pattern characteristics
Power voltage results when the ignition power transistor is ON.