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Component Tests and General Diagnostics|Page 4934 > < Component Tests and General Diagnostics|Page 4932
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Ignition Coil And Power Transistor Waveforms

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 cannot 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.

With California Emissions

USING SCAN TOOL

Component Tests and General Diagnostics|Page 4934 > < Component Tests and General Diagnostics|Page 4932