oxygen sensor oscilloscope

What is the purpose of the complex electronic engine management systems in catalyst equipped vehicles?

• Reduce voltage signal to ECM

• Increase exhaust oxygen level

• Ignore irregularities in system performance

• Maintain mixture level between close tolerances

How does the oxygen sensor provide feedback to the ECM?

• By increasing the voltage signal

• By displaying wave forms on the screen

• By connecting to the oscilloscope

• By reacting to small changes in exhaust oxygen level

What can be detected by watching the oxygen sensor signal with an oscilloscope?

• Battery voltage level

• Tire pressure

• Fuel efficiency of the vehicle

• Irregularity in system performance

How can the overall system performance be determined using an oscilloscope?

• By disconnecting the oxygen sensor

• By checking the wave form displayed

• By increasing the voltage signal

• By adjusting the exhaust oxygen level

What assists in interpreting the trace displayed on the oscilloscope?

• Reference to typical wave forms illustrated in the chapter

• Specialist knowledge and experience

• Disconnecting the ECM

• Increasing the voltage signal