Deck 11: Electronically Controlled Transmission

Question 1

All the following statements are true except:

A) In a fully hydraulically controlled transmission, the shift points are controlled by the vehicle's power train control module (PCM).
B) In a fully electronically controlled transmission, the shift points are controlled by the vehicle's power train control module (PCM).
C) In a fully electronically controlled transmission, the shift points are controlled by the vehicle's transmission control module (TCM).
D) On a hydraulically controlled transmission, the computer can react to the increased load only after the transmission shifts.

Answer 1

A

Question 2

Tech A says that electronically controlled automatic transmissions have improved fuel efficiency. Tech B says that more gears with electronically controlled automatic transmissions have improved fuel efficiency. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Answer 2

C

Question 3

Tech A says that electronic transmissions today are smaller and lighter than hydraulically controlled transmissions. Tech B says that electronic transmissions are beefier today to withstand higher torques. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Answer 3

A

Question 4

All of the following statements are true with respect to the vehicle speed sensor (VSS) except:

A) It is responsible for sending the vehicle speed information to the vehicle speedometer.
B) It is sometimes called an output shaft speed sensor.
C) It is often also responsible for sending the vehicle speed information to the vehicle speedometer.
D) It can never replace a governor in a computerized transmission.

Question 5

All the following statements describing the VSS are true except:

A) The types of VSS are magnetic pickup and reed switch.
B) An input shaft speed sensor is similar to a VSS and relays its signal to the PCM.
C) It relays vehicle speed information to the speedometer.
D) It is primarily used to determine functionality of emissionsrelated components.

Question 6

Tech A says that reed switches produce air-conditioning voltage. Tech B says that a magnetic VSS can be troubleshot by checking to see if the sensor is producing a DC voltage when the output shaft is turning. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 7

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?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 8

Transmission pressure switches are:

A) open when there is pressure.
B) used to determine what gear range the transmission is operating in.
C) present in the dashboard.
D) used to determine the pressure of the transmission fluid.

Question 9

Which of the following is a pressure transducer?

A) Electric-only propulsion
B) Manual lever position (MLP) switch
C) Overdrive switch
D) Line pressure sensor

Question 10

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

A) MAF sensor
B) ECT sensor
C) MAP sensor
D) CKP sensor

Question 11

Tech A says that the ECT and the TFT will delay transmission shifting. Tech B says that the ECT and the TFT could cause the transmission to shift sluggishly or way too soon. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 12

Tech A says that all MAP sensors send a signal to the PCM to determine engine load. Tech B says that all MAF sensors send a signal to the PCM to determine engine load. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 13

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

A) Manual lever position switch
B) Reed switch
C) Line pressure sensor
D) Throttle position sensor

Question 14

An electromechanical device used to control oil flow to bands and clutches in an automatic transmission to help shift the transmission is the:

A) torque converter clutch.
B) throttle position sensor.
C) shift solenoid.
D) potentiometer.

Question 15

Tech A says that when troubleshooting a TPS at WOT, the return voltage should not exceed 12 volts. Tech B says that when using a digital storage oscilloscope to troubleshoot a TPS up to WOT, KOEO voltage should rise steadily up to WOT. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 16

Tech A says that the PCM uses the brake switch information to hold the transmission in gear during braking, no shifts allowed. Tech B says that when troubleshooting an ECT sensor, using a paper clip to jump the connector will help determine if the problem is the sensor or the wiring.
Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 17

All of the following statements are true except:

A) The PCM or the TCM is the brain in the system.
B) The PCM monitors the TPS sensor along with the VSS to determine a driver's driving pattern.
C) Slippery conditions require a gear ratio that enhances traction and the stability of motion of the vehicle.
D) Increasing the amount of torque being transmitted to the transmission reduces transmission wear.

Question 18

Choose the correct statement with respect to limp-in mode.

A) It refers to the event of failure of the transmission computer, where the vehicle still functions.
B) It is a sensor used by the PCM to monitor engine speed.
C) It is a sensor that changes resistance based upon coolant temperature.
D) It is a type of speed sensor that uses a magnetic field to open and close a movable set of contacts.

Question 19

Technician A says that a CVI number of 190 indicates that the transmission is slipping. Technician B says that CVI numbers range from 0 to 255. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 20

Tech A says that automatic transmissions will change gear ratios based upon winter weather conditions. Tech B says that on a vehicle with traction control, the transmission will change shift programming to assist. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 21

Technician A says that automatic transmissions will change gear ratios based upon winter weather conditions. Technician B says that on a vehicle with traction control, the transmission will change shift programming to reduce wheel spin. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 22

In a fully electronically controlled automatic transmission, the shift points are controlled by hydraulic and mechanical devices such as springs and valves.

Question 23

If the transmission oil is hot, the Powertrain Control Module (PCM) may decrease line pressure to compensate for internal leaks, as thinner oil flows past valves and seals more easily.

Question 24

Most modern vehicles cannot identify and adapt to a driver's individual style and to environmental conditions.

Question 25

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?

A) Split Coefficient Determination
B) Wheel Slip Monitoring
C) Vehicle Deceleration Rate
D) Brake Lining Temperature Calculation

Question 26

Which of the following actions enhances traction and the stability of motion of the vehicle in slippery conditions?

A) Decreasing line pressure
B) Torque converter clutch engagement
C) Selecting the appropriate gear ratio
D) Increasing line pressure

Question 27

Identification of an environment means identifying unusual ambient conditions in which the vehicle is operating.

Question 28

Technician A says the Powertrain Control Module (PCM) cannot identify and adapt to environmental conditions. Technician B says the first step in a PCM's fault detection system is a basic circuit test. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 29

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

A) Shift solenoid
B) Gear ratio
C) Fast apply clutch
D) Torque converter clutch

Question 30

Technician A says that to prevent adaptive transmission shifting concerns when servicing the battery, a memory saver should be used. Technician B says that when performing a battery service, the customer must be advised that the adaptive memory was lost and the vehicle will relearn transmission shifting after driving it for a few days. Who is correct?

A) Technician A
B) Technician B
C) Both technicians
D) Neither technician

Question 31

Most vehicle manufacturers have integrated the Powertrain Control Module into the Transmission Control Module.

Question 32

The Powertrain Control Module (PCM) and Transmission Control Module (TCM) have memory that contains the software for the computer. Which of the following is also retained in memory in these modules?

A) DTCs
B) Freeze-frame data
C) Learned data
D) All of the above

Question 33

Which of the following statements are True about the input sensor section of the PCM?

A) It is responsible for sending the proper reference voltage to many of the sensors
B) It receives the sensor signals and processes them into information that the main computer processor can use
C) Both A and B
D) Neither A nor B

Question 34

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

A) Input drivers
B) Output drivers
C) Analog / Digital converter
D) Digital / Analog converter

Question 35

The processor and drivers make up the physical portion of the Powertrain Control Module (PCM).

Question 36

The Powertrain Control Module (PCM) performs basic circuit checks as part of the electronically controlled transmissions self-diagnostic routine. Which of the following would qualify as a basic check?

A) Open sensor circuit check
B) Grounded sensor circuit check
C) Out of range value check
D) All of the above

Question 37

A more sophisticated type of fault detection is when the (PCM) monitors the input shaft speed sensor and compares it to the VSS to determine ________.

A) Torque converter clutch solenoid operation
B) Gear ratios
C) Torque converter flare
D) Transmission slippage

Question 38

Newer PCMs have logic programmed into them that allows more sophisticated self-diagnosis.

Question 39

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

A) Install a smaller transmission in the vehicle
B) Install a larger transmission in the vehicle
C) Allow the transmission to operate in two gears at once
D) Allow the solenoids to directly operate the clutches and bands

Question 40

To manage the engine's torque, the PCM may be programmed to cut back on the ________ of the engine right before the transmission shifts.

A) Shift solenoids
B) Ignition timing
C) Gear ratio
D) None of the above

Question 41

By having a completely electronically controlled transmission and engine, the PCM is able to reduce the amount of torque being produced by the engine just after the transmission shifts.

Question 42

Technician A says the Powertrain Control Module (PCM) can reduce transmission wear by torque reduction during gear shifting. Technician B says the PCM monitors gear ratios as a method of fault detection. Which technician is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 43

Which of the following items make up a Powertrain Control Module (PCM) and / or Transmission Control Module (TCM)?

A) A storage memory section
B) A data processor section
C) An input sensor control and processing section
D) All of the above

Question 44

A vehicle comes in only operating in 3rd gear. Technician A says the transmission will need to be replaced. Technician B says that the transmission might be operating in limp-in mode. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 45

Chrysler Powertrain and Transmission Control Modules calculate a parameter called Clutch Volume Index (CVI). What can the CVI value be used for?

A) To determine how worn the clutch or band is
B) To adjust shift timing and pressures to match worn clutches and bands
C) Both A and B
D) Neither A nor B

Question 46

Much of the wear and tear in an automatic transmission occurs during the relatively short time that the transmission is shifting between gears.

Question 47

Limp-in mode means that even if the computer for the transmission or the part of the PCM that controls the transmission fails, the vehicle will still be driveable.

Question 48

On many modern transmissions, first gear is designed to be the limp-in gear.

Question 49

What can be calculated by the Powertrain Control Module by comparing the input shaft speed sensor and output shaft speed sensor?

A) Gear ratio
B) Clutch or band slippage
C) Both A and B
D) None of the above

Question 50

Technician A says the Powertrain Control Module (PCM) manages engine torque by retarding engine ignition timing prior to transmission shifts. Technician B says limp-in mode refers to the vehicle still functioning in the event of a failure of the transmission computer or part of the PCM that controls the transmission. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 51

Technician A says the Torque Converter Clutch (TCC) solenoid is monitored by the Powertrain Control Module (PCM) and Diagnostic Trouble Codes can be set when the TCC is not operating correctly. Technician B says on hydraulically controlled transmissions, the PCM will not set codes unless the TCC circuit is open or shorted, or the solenoid is shorted. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 52

Most electronically controlled transmissions have a fail-safe or _______ mode.

A) Limp-In
B) Secondary
C) Anti-Fail
D) Warranty

Question 53

The Powertrain Control Module (PCM) monitors the ________ and the input shaft speed sensor to determine the amount of torque converter slippage and control the lock-up of the Torque Converter Clutch (TCC).

A) Camshaft Position (CMP) Sensor
B) Crankshaft Position (CKP) Sensor
C) Engine Coolant Temperature (ECT) Sensor
D) None of the above

Question 54

Technician A says most electronically controlled transmissions have a hyper drive mode to improve fuel economy. Technician B says that all automatic transmissions have a kill switch to stop it from being drivable if the Powertrain Control Module fails. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 55

Technician A says on most transmissions, if the Powertrain Control Module (PCM) fails, the Electronic Pressure Control (EPC) solenoid will mechanically default to minimum line pressure to prevent clutch and band breakage. Technician B says the PCM's fault detection system can test the continuity of solenoid circuits. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 56

Technician A says the Powertrain Control Module (PCM) can reduce transmission wear by increasing torque during gear shifting. Technician B says the PCM monitors input shaft and output shaft speed as a method of fault detection. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 57

Technician A says the Powertrain Control Module (PCM) is able to reduce the amount of torque being produced by the engine right before the transmission shifts. Technician B says limp-in mode refers to the vehicle shutting down in the event of a transmission damaging fault. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 58

Which of the following can cause an electronically controlled transmission to operate incorrectly?

A) Air leak after the mass airflow (MAF) sensor
B) Exhaust system restriction
C) Both A and B are correct
D) None of the above

Question 59

Technician A says on electronically controlled transmissions, the Torque Converter Clutch (TCC) solenoid is monitored by the Powertrain Control Module (PCM) and diagnostic trouble codes can be set when the TCC is not operating correctly. Technician B says on older hydraulically controlled transmissions, the PCM will set codes if the TCC solenoid is physically stuck closed. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 60

Shifting can occur, in some transmissions, when the computer commands a solenoid valve to allow line pressure to be directly sent to the correct application device to complete the shift.

Question 61

Shift solenoids are duty cycled to cushion the shift in an electronically controlled transmission.

Question 62

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.

A) Anti-drainback valves
B) Electronic pressure control solenoids
C) Shift solenoids
D) None of the above

Question 63

How many shift solenoids are normally used in many four-speed automatic transmissions?

A) One
B) Two
C) Three
D) None of the above

Question 64

In computer controlled transmissions, which of the following is controlled electronically to direct hydraulic pressure to move the shift valves and activate the various clutches and bands within the transmission?

A) Shift solenoids
B) Vehicle speed sensor
C) Manifold absolute pressure sensor
D) Throttle position sensor

Question 65

Which of the following describes how shift solenoids are controlled by the PCM?

A) Shift solenoids are simply turned on and off
B) Shift solenoids are pulse width modulated to vary apply pressure
C) Shift solenoids are duty-cycled to vary apply pressure
D) Shift solenoids are activated by fixed pulse width

Question 66

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

A) 2
B) 4
C) 6
D) 8

Question 67

In many transmissions, the solenoids indirectly operate the:

A) clutches and bands
B) governor and throttle valves
C) torque converter clutch
D) front pump pressure relieve valves

Question 68

Which of the following describes the operation of shift solenoids?

A) Shift solenoids are used to open or close a fluid passage
B) Shift solenoids are pulse width modulated to control fluid pressure
C) Shift solenoids are provided variable voltage to adjust shift feel
D) Shift solenoids are provided variable resistance to current flow

Question 69

Technician A says a solenoid valve is a hydraulic valve that controls the flow of electricity to the Powertrain Control Module (PCM). Technician B says that solenoid valves are typically used to control the flow of fluid to shift valves, or directly to clutches and bands. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 70

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?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 71

The higher the pulse width of a pressure control solenoid, the higher the transmission line pressure is.

Question 72

Technician A says on computerized transmissions, an Electronic Pressure Control (EPC) solenoid is used to control line pressure. Technician B says most EPC solenoids are pulse-width modulated. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 73

Technician A says a pulse-width modulation value of 50% means the valve is open 50% of the time and closed 50% of the time. Technician B says a pulse-width modulation of 255 means that line pressure is increased by 25%. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 74

Technician A says electronically controlled transmissions use Electronic Pressure Control (EPC) solenoids to control line pressure. Technician B says when testing EPC solenoids with a digital storage oscilloscope (DSO), the voltage pattern would be a square wave. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 75

If the maximum line pressure available in a transmission was 200 PSI, and the Electronic Pressure Control (EPC) solenoid is at 50% pulse width, what pressure reading would you expect on a gauge installed in the line pressure test port?

A) 50 psi
B) 100 psi
C) 150 psi
D) 200 psi

Question 76

Technician A says electronically controlled transmissions use Electronic Pressure Control (EPC) solenoids to control line pressure. Technician B says when looking at electronic pressure control solenoids with a digital storage oscilloscope (DSO); the voltage pattern would be a sine wave. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 77

When measuring line pressure in an automatic transmission with a maximum available pressure of 200 psi, and the Electronic Pressure Control solenoid commanded value at 50%, which of the following measurements would you expect the actual line pressure to be?

A) 50 psi
B) 100 psi
C) 150 psi
D) 200 psi

Question 78

Technician A says electronically controlled transmissions use Electronic Pressure Control (EPsolenoids to control shift timing. Technician B says when looking at electronic pressure control solenoids with a digital storage oscilloscope (DSO); the voltage pattern would be a square wave. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 79

Technician A says on computerized transmissions, an electronic pressure control (EPsolenoid is used to regulate transmission line pressure. Technician B says most EPC solenoids are pulse-width modulated. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 80

Technician A says a pulse-width modulation of 50% means the valve is energized 50% of the time and de-energized 50% of the time. Technician B says if an EPC pulse-width modulation value is 25%, that means that line pressure is increased by 25%. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B