S Check Using a Digital Multimeter

If a digital multimeter (DMM) is used, like the Fluke 80 series, set up the meter as follows:

• Select the MIN/MAX feature

• Press the MIN/MAX button to toggle between maximum, minimum, and average signal voltage

Tests can be performed by connecting your test instrument to the OX1 / OX2 terminal of DLC1, or by back probing directly at the oxygen sensor connector.

Many factors can contribute to the degradation of the oxygen sensor including age and contamination. Since this topic relates closely with catalytic converter operation, it will be discussed in detail later.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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