The signal voltage generated by a throttle position sensor rises as the throttle is opened, reaching a maximum reading of almost volts.

• 1

• 5

• 10

• 15

Tech A says that the output drivers in the PCM typically send either simple on/off signals, or pulse-width-modulated signals to the actuators, depending on the actuator being controlled. Tech B says that in many cases, the software in the PCM's memory can be updated by uploading software updates, called a reflash process. Who is correct?

• Tech A

• Tech B

• Both A and B

• Neither A nor B

Tech A says that the oxygen sensor is part of the feedback system for the engine management system. Tech B says that long-term fuel trims that are positive means that the PCM is leaning out the fuel mixture from the base pulse-width setting. Who is correct?

• Tech A

• Tech B

• Both A and B

• Neither A nor B

Tech A states that engine management systems were born out of a need for greater efficiency and emission control. Tech B states that the engine management system controls the operation of the engine and all of its related system. Who is correct?

• Tech A

• Tech B

• Both A and B

• Neither A nor B

About how much signal voltage is generated by a throttle position sensor at closed throttle?

• 1 volt

• 10 volts

• 50 volts

• 100 volts

Tech A says that analog signals are continuously variable signals. Tech B says that digital signals are direct on/off signals with no in-between transition. Who is correct?

• Tech A

• Tech B

• Both A and B

• Neither A nor B

Tech A says that in modern vehicles, an oxygen sensor is only positioned in the exhaust pipe after the catalytic converter. Tech B says that the oxygen sensor provides the electronic body control module (EBCM) with an electrical signal that relates to the amount of oxygen in the exhaust gas. Who is correct?

• Tech A

• Tech B

• Both Techs A and B

• Neither Tech A nor B

Which of the following is the best tool to measure the voltage output from a throttle position sensor?

• Scan tool

• DVOM

• DMM

• Digital storage oscilloscope (DSO)

Which part of a powertrain control module retains diagnostic trouble codes (DTC's), freeze-frame data, and learned data?

• Memory and storage section

• Sensor input/output signal processing section

• Data processing section

• Output drivers section

Which node of the PCM translates information from, or to, the other networks so that it can be shared between networks?

• Gateway node

• Program node

• Memory node

• Data node