Exam 11: Electronically Controlled Transmission

Which of the following is another name for the input shaft speed sensor?

Technician A says that a CKP sensor sends a pulsed signal to the PCM to determine engine speed. Technician B says that the CKP speed signal is compared to the transmission input shaft speed sensor to determine torque converter slippage. Who is correct?

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?

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

The PCM uses the __________ to determine engine speed.

Technician A says that the PCM will compare the input shaft speed to the output shaft speed to determine gear ratio. Technician B says that the PCM will compare the input shaft speed sensor to the output shaft speed sensor to test for a slipping component or clutch. Who is correct?

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

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 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?

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?

Which of the following is used to report that oil pressure is present in a specific hydraulic circuit in a transmission: for example, the torque converter clutch (TC Circuit)

The PCM varies the shift timing and pressures based on changes from this thermistor sensor.

Choose the correct statement:

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

Technician A says a typical Manifold Absolute Pressure (MAP) sensor can be connected directly to the intake manifold or connected through a vacuum hose. Technician B says most modern MAP sensors do not use a flexible silicon chip within a chamber anymore. Who is correct?

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

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.

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 throttle position sensor (TPS) failure results in a value between 0V and 5V from being returned to the powertrain control module (PCM).

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