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This activity contains 10 questions.
The use of an electronic throttle control (ETC) system allows the elimination of all EXCEPT _____________.
Mechanical throttle cable (most systems)
Cruise control actuator
Idle air control
The throttle plate is spring loaded to hold the throttle slightly open how far?
3% to 5%
8% to 10%
16% to 20%
22% to 28%
The throttle plate actuator motor is what type of electric motor?
The actuator motor is controlled by the PCM through what type of circuit?
When does the PCM perform a self-test of the ETC system?
During cruise speed when the throttle is steady
When the ignition switch is first rotated to the on position before the engine starts
The throttle position sensor used in the throttle body assembly of an electronic throttle control (ETC) system is what type?
A single potentiometer
Two potentiometers that read in the opposite direction
A Hall-effect sensor
Either two potentiometers that read in the opposite direction or a Hall-effect sensor
A green wrench symbol is displayed on the dash. What does this mean?
A fault in the ETC in a Ford has been detected
A fault in the ETC in a Honda has been detected
A fault in the ETC in a Chrysler has been detected
A fault in the ETC in a General Motors vehicle has been detected
A technician is checking the operation of the electronic throttle control system by depressing the accelerator pedal with the ignition in the on (run) position (engine off). What is the most likely result if the system is functioning correctly?
The throttle goes to wide open when the accelerator pedal is depressed all the way
No throttle movement
The throttle will open partially but not all of the way
The throttle will perform a self-test by closing and then opening to the default position
With the ignition off and the key out of the ignition, what should happen if a technician uses a screwdriver and gently pushes on the throttle plate in an attempt to open the valve?
Nothing. The throttle should be kept from moving by the motor, which is not energized with the key off.
The throttle should move and stay where it is moved and not go back unless moved back.
The throttle should move, and then spring back to the home position when released.
The throttle should move closed, but not open further than the default position
The throttle body may be cleaned (if recommended by the vehicle manufacturer) if what conditions are occurring?
Lower-than-normal idle speed
Any of the above
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