Question 1

What unit of measure is often used to express the amount of intake air measured by the Mass Air Flow (MAF) sensor?

Accepted Answer

The Mass Air Flow (MAF) sensor typically measures the amount of air entering the engine in grams per second (gps).

Question 2

Which of the following parts are used to either send transmission line pressure to a clutch or brake directly or send oil pressure to move a spool type shift valve in the valve body.

Accepted Answer

Shift solenoids are used to control the flow of transmission fluid to the appropriate clutch or brake, or to move a spool type shift valve in the valve body.

Question 3

Which of the following sends either simple on/off signals or pulse-width-modulated signals to the actuators, depending on the actuator being controlled?

Accepted Answer

Output drivers send either simple on/off signals or pulse-width-modulated signals to the actuators, depending on the actuator being controlled.

Question 4

Manufacturers have found that by using torque management to reduce the amount of torque during shifting, they can _________.

Accepted Answer

Reducing torque during shifting allows manufacturers to install a smaller transmission because it reduces the stress and load on the transmission components, allowing them to be designed with less capacity.

Question 5

What information is provided via the anti-lock brake sensors that may confirm poor tire traction, and a winter shift program can be initiated by the PCM on a vehicle with traction control?

Accepted Answer

Wheel slip monitoring is used by the traction control system to detect poor tire traction, allowing the PCM to initiate a winter shift program to improve vehicle stability.

Question 6

A vehicle comes in with the check engine light on. The vehicle is scanned and has transmission ratio error codes for 1st, 2nd, 3rd, and 4th gears (i.e. all forward gears). Technician A says that the problem could be a faulty output shaft speed sensor. Technician B says that the problem could be a faulty transmission front pump. Who is correct?

Accepted Answer

The answer of A vehicle comes in with the check...

Question 7

Technician A says that on most vehicles if the Electronic Pressure Control (EPC) solenoid fails the vehicle will have high line pressure. Technician B says that if an EPC fails it will cause a delayed shift in most vehicles. Who is correct?

Accepted Answer

The answer of Technician A says that on most vehicles...

Question 8

Which of the following is typically the output of a reed switch?

Accepted Answer

The answer of Which of the following is typically the...

Question 9

Which of the following provides input shaft speed data to the Powertrain Control Module (PCM)?

Accepted Answer

The turbine speed sensor provides input shaft speed data to the PCM, as it measures the speed of the transmission's input shaft.

Question 10

The ________ is a type of variable resistor called a potentiometer.

Accepted Answer

A throttle position sensor is a type of variable resistor known as a potentiometer, which measures the position of the throttle in an internal combustion engine.

Question 11

Many four-speed automatic transmissions use ________ shift solenoids to control the transmission.

Accepted Answer

Many four-speed automatic transmissions typically use 2 shift solenoids to control the shifting process.

Question 12

Data from the input shaft speed sensor and output shaft speed sensor are compared by the transmission control module (TCM) or powertrain control module (PCM) to determine all of the following, EXCEPT:

Accepted Answer

The TCM or PCM uses input and output shaft speed data to determine gear ratio, clutch or band slippage, and shift timing, but not engine misfires, which are detected by other sensors like the crankshaft position sensor.

Question 13

Slippery conditions require a _______ that enhances traction and the stability of motion of the vehicle.

Accepted Answer

A gear ratio can be adjusted to enhance traction and stability in slippery conditions by providing the appropriate power and torque distribution to the wheels.

Question 14

Tech A says that transmissions with an input shaft speed sensor and a vehicle speed sensor (VSS) can use this information to determine shift solenoid failure. Tech B says the input shaft speed sensor is also called a turbine speed sensor. Who is correct?

Accepted Answer

Tech A is correct because the transmission control module can use input shaft speed and vehicle speed data to detect issues like shift solenoid failure. Tech B is correct because the input shaft speed sensor is commonly referred to as a turbine speed sensor.

Question 15

Which of the following is a pressure transducer?

Accepted Answer

A line pressure sensor is a type of pressure transducer that measures the pressure within a system and converts it into an electrical signal.

Question 16

Which of the following is installed in an engine coolant passage, often near the thermostat housing on an engine?

Accepted Answer

The ECT (Engine Coolant Temperature) sensor is installed in an engine coolant passage, often near the thermostat housing, to measure the temperature of the engine's coolant.

Question 17

Which of the following is used by the PCM to tell which gear range the driver has selected with the shift lever?

Accepted Answer

The manual lever position switch is used by the Powertrain Control Module (PCM) to determine the gear range selected by the driver with the shift lever.

Question 18

What type of resistor is a transmission fluid temperature sensor?

Accepted Answer

A transmission fluid temperature sensor is typically a thermistor, which is a type of resistor that changes its resistance with temperature.

Question 19

Two technicians are discussing electronically controlled automatic transmissions. Technician A says inside many transmissions, there are small pressure switches. Technician B says these small pressure switches are simple open or closed type switches. Who is correct?

Accepted Answer

Both Technician A and Technician B are correct. Inside many electronically controlled automatic transmissions, there are small pressure switches that are indeed simple open or closed type switches.

Question 20

Where is the Throttle Position Sensor (TPS) mounted?

Accepted Answer

The Throttle Position Sensor (TPS) is typically mounted on the engine throttle body assembly to monitor the position of the throttle valve.

Quiz 11: Electronically Controlled Transmission