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Home >> Mitsubishi >> 1990 >> Montero SP, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> Oxygen Sensor >> Inspection Using Oscilloscope
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Inspection Using Oscilloscope

  1. Connect the probe to the oscilloscope pick-up point as shown in the circuit diagram. See Figure .
  2. After the engine is warmed up, keep the engine running at 2000 RPM, and check the waveform. For normal waveform, see Fig 1 .
Fig 1: Identifying Normal Oxygen Sensor Waveform
G00358351Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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