Exam 11: Electronically Controlled Transmission

Technician A says typically an Engine Coolant Temperature (ECT) sensor may not read properly if the coolant is low. Technician B says a Cylinder Head Temperature (CHT) sensor will read correctly because it doesn't rely on coolant level. Who is correct?

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?

All the following statements describing the VSS are true except:

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?

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

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?

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.

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

Technician A says that the Engine Coolant Temperature (ECT) and the Transmission Fluid Temperature (TFT) will delay transmission shifting. Technician B says that the ECT and the TFT could cause the transmission to shift sluggishly. Who is correct?

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.

Which of the following is a pressure transducer?

The sensor responsible for sending a signal that indicates the amount of load on an engine is the:

Which of the following is used on electronically controlled automatic transmissions in place of the vacuum modulator valve?

The Accelerator Pedal Position (APP) sensor is used on drive-by-wire vehicles to determine the driver's intent to accelerate or decelerate.

The automatic transmission's pressure regulator valve keeps the pressure at a regulated level by exhausting excess pressure back to the transmission pan.

Technician A says that a TPS signal is an important input used by the PCM to determine transmission operation. Technician B says that scan tool data is the best way to verify TPS operation. Who is correct?

Technician A says that delayed shifts could be caused by a malfunctioning Throttle Position Sensor (TPS). Technician B says that TPS data can be used to determine clutch slippage. Who is correct?

The main sensor that determines engine speed is the CMP.

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?

The automatic transmission pressure switches can be used by the computer to determine what gear the transmission is operating in.