Exam 5: Computers and Input Sensors

The OBD II test strategies compare sensor inputs to one another during a rationality test.

Technician A says that the conventional oxygen sensor produces a fluctuating high/low voltage signal. Technician B says an air/fuel ratio sensor produces a more constant output signal voltage. Who is correct?

The air/fuel ratio sensor (AFS) circuit can be measured directly with a digital multimeter with accuracy.

What is an EEPROM, and how does it differ from older versions?

Technician A says that when a DTC is cleared from the PCM memory, the system readiness monitors are also cleared. Technician B says that after an emissions repair is completed, the DTCs stored should be cleared from the PCM. Who is correct?

What is the major difference in the air/fuel sensor operation over the conventional oxygen sensor?

Why would an air/fuel ratio sensor be used instead of a conventional oxygen sensor?

Mass air flow sensor voltage corresponds to:

What is the CAN protocol, and how is it standardized?

What sensor has the wide range air/fuel ratio sensor (AFS) taken the place of?

The air/fuel ratio sensor produces what type of output signal?

If the malfunction indicator light is on and a DTC P0131 is stored for O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1), what is the most likely cause for this code to be set?

Many of today's computers utilize a technology that allows for electronically erasable programmable read-only memory (EEPROM).

What is each one (1) or zero (0) in a data stream is referred to as?

The coolant temperature sensor is a negative temperature coefficient sensor; therefore:

What is the circuit over which serial data is transmitted called?