Oscilloscope Pattern Diagnostics (Various Coil Manufacturers)

If vehicle is equipped with Bremi, Beru, May and Christe or Bosch coil, evaluate ignition voltage peaks and decay characteristics at idle speed. See Fig 1. To evaluate combustion voltage characteristics at increased engine speeds of approximately 2500 RPM, See Fig 2-Fig 5 .

Fig 1: Identifying Oscilloscope Patterns (Ignition Voltage & Decay - Various Manufacturers)

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Fig 2: Identifying Oscilloscope Patterns (Combustion Voltage Characteristics - Bremi Coil)

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Fig 3: Identifying Oscilloscope Patterns (Combustion Voltage Characteristics - Beru Coil)

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Fig 4: Identifying Oscilloscope Patterns (Combustion Voltage Characteristics - May & Christe Coil)

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Fig 5: Identifying Oscilloscope Patterns (Combustion Voltage Characteristics - Bosch Coil)

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