Throttle Actuator Control

What methods are adopted by manufacturers to measure rotation or position of the accelerator pedal or throttle valve

• Potentiometer

• Momentary switching

• Proximity switching

• Contactless inductive

• Contactless Hall

What systems affect Throttle Actuator Control (TAC) operation?

click all that apply

• forward lighting assist module

• Idle speed control

• adaptive cruise control

• Traction control

What is the purpose of the TAC system?

• It saves the consumer money as there is no adjustment of the throttle linkage during service

• Reduces the load on the engine intake system and increases torque

• It enables the integration with other systems such as adaptive cruise control, ESP, adaptive braking and traction control

• To enable more top end power, due to the reduced weight

At rest and with the ignition switched off, what would the position of the throttle valve angle be?

• 21%

• 25%

• 18%

• 13%

• 24%

In a contactless inductive APP sensor, what would the output phase angle be, if the pedal was at rest

• Both input and output voltages would be zero

• The input phase angle would have a greater amplitude than the output

• There would be no induced voltage as the pedal is at rest

• The phases would be equal

Why are there two position sensors used in either the APP or TPS

• For self diagnosis

• to confirm voltages are equal at all times

• because three would be expensive

• for redundancy

The TAC system on a GDI engine, operates in the same way as a CRD engine

• True

• False

What are some of the advantages gained when using contactless type position sensors?

Click all that apply

• Temperature resistant

• Shock resistant

• Dirt resistant

• Output signal is more accurate

• They are cheaper to manufacture

How is the returned signal voltage monitored by the ECM, in a contact type position sensor?

Click all that apply

• Bi Directional current sensing driver

• Bidirectional motor

• Low side or High side Driver

• Pull up or pull down resistor

In a hall type sensor, the output signal is?

• conditioned and amplified and then sent back to the ECM

• swiped over the carbon strips, sending a varied voltage to the ECM

• Supplied by the pull up resistor

• produced using inductive coils an AC voltage is induced into the output windings through excitation of the input windings