Exam 11: Electronically Controlled Transmission

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

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

All transmission range circuits use a simple on-off switch to indicate if there is pressure in the circuit or not.

The TPS is an input that measures the angle of the throttle assembly.

An accelerator pedal position sensor is similar to a throttle position sensor as they both can determine speed of throttle operation and position.

Technician A says that reed switches produce an AC signal. Technician B says that a magnetic Vehicle Speed Sensor (VSS) can be diagnosed by observing the pattern on a lab scope and comparing it to a known good pattern. Who is correct?

Regardless of the design style of the CKP, its purpose is to send a signal to the PCM to determine camshaft speed.

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?

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

Which of the following vehicle speed sensors (VSS) typically requires a supply of electricity to operate?

The PCM monitors the brake on/off switch to control TCC operation.

All MAF sensors can be safely cleaned.

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?

Which of the following describes the information provided by the Accelerator Pedal Position (APP) sensor?

When an accelerator pedal position sensor sees a quick release of the pedal, this could indicate the need for a possible downshift.

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

Technician A says that a quick depressing of the accelerator pedal could indicate more power and a need for a downshift and delayed upshifts. Technician B says that a quick release of the throttle pedal could indicate more power and a need for a downshift and delayed upshifts. Who is correct?

Technician A says that the MAF sensor measures the mass of the incoming air. Technician B says that a MAF is used because the more air entering the engine means the harder an engine is working. Who is correct?

Technician A says the engine load sensor is used to determine when the Torque Converter Clutch (TCC should be applied and released). Technician B says Manifold Absolute Pressure (MAP) sensors may be used to test certain emissions related components for proper function. Who is correct?

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?