Exam 11: Electronically Controlled Transmission

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?

Which of the following describes the output pattern of a reed switch?

Where is the Throttle Position Sensor (TPS) mounted?

Which of these receives various inputs from the engine and transmission to determine the shift timing and the firmness of the shift?

Technician A states that most vehicle manufacturers have integrated the Transmission Control Module (TCM) into the construction of the Powertrain Control Module (PCM). Technician B states that in an electronically controlled transmission, the shift points are controlled by the vehicle's PCM. Who is correct?

Which of the following is used to report the presence of hydraulic pressure in an apply circuit, such as the Torque Converter Clutch (TCC)?

The Powertrain Control Module (PCM) or Transmission Control Module (TCM) varies shift timing and pressure based upon the Transmission Fluid Temperature (TFT) sensor readings.

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?

The CKP sensor is used to determine torque converter slippage.

Which of the following is the type of sensor used to measure transmission line pressure?

What kind of variable resistor is a transmission oil temperature (TOT) sensor?

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?

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

Technician A says crankshaft position sensors can be a magnetic pickup-style sensor. Technician B says crankshaft position sensors can be a Hall-effect sensor or an optical-style sensor. Who is correct?

Which of the following switch designs are used as pressure switches in computer controlled transmissions?

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?

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?

In computer-controlled transmission systems, the electronic sensors and actuators that replaced the hydraulic and mechanical control devices perform the exact same function: controlling the flow of hydraulic fluid to and from the transmission components.

Which of the following is improved by computerized transmission control?

The input speed sensor is very similar to the vehicle speed sensor.