Exam 42: Electronic Automatic Transmissions

The Toyota/Lexus hybrid is driven by MG1 when running solely on electric power.

Name three input sensors that connect directly to the TCM. These sensors are generally mounted on or inside the transmission.

A(n)____________________ changes analog AC signals into digital DC square waves.

When a Toyota/Lexus hybrid vehicle is operating under heavy loads, ______.

A homemade tester for checking the operation of the ____________________ can easily be made from an old wiring harness and a few simple switches.

The TCM is programmed to adjust its operating parameters in response to changes within the system, such as component wear. As component wear and shift overlap times increase, the TCM adjusts line pressure to maintain proper shift timing calibrations. This is called ____________________.

In the Toyota/Lexus hybrid transaxle, the engine output is coupled to what component of the planetary gearset?

A DTC for an input signal that is too low or too high can be caused by an internal transmission mechanical or hydraulic failure.

The Toyota/Lexus hybrid transaxle uses a _________________ that combines the power from the gasoline engine with the power from the electric motors.

On the Toyota/Lexus automatic transmissions with manual control, drivers must exercise caution when manually shifting to prevent engine or transmission failure.

Name four input sensors that supply information to the TCM (transmission control module)through the network bus.

A _____ contains the actual shift points to be used by the computer according to the input data it receives from the sensors.

Transmission solenoids shift gears by mechanically coupling gears to the output shaft.

Two technicians are discussing CVT transmissions. Technician A says that when a CVT-equipped car is accelerating, the engine RPM remains constant as the mph increases. Technician B says that some CVT vehicles do not have torque converters. They use a multiple disc starting clutch for idling and starting from a dead stop.

Technician A measures sensors only when they are cold. Technician B uses dielectric grease on electrical connections to prevent corrosion. Who is correct?

Two technicians are discussing the operation of the Toyota/Lexus hybrid transaxle. Technician A says that the vehicle is driven electrically by MG2 when the transmission selector is in reverse. Technician B says that whenever the car is powered by MG2, the engine may start if the battery SOC is low. Who is correct?

How does adaptive learning improve the shift quality of an electronically controlled transmission?

How do you diagnose a problem with an electronically controlled transmission that does not set a DTC?

The application of the TCC (torque converter clutch)is controlled by the ______.

How does a pulse width modulated solenoid control transmission pressure?