Deck 73: Throttle Position Tp Sensors

Question 1

The torque converter clutch will release when any movement of the TP sensor is detected.

Answer 1

False

Question 2

Typical TP sensor voltage at idle is about ________.

A)2.5 to 2.8 volts
B)1.5 to 2.8 volts
C)0.5 volt or 10% of WOT sensor voltage
D)13.5 to 15.0 volts

Answer 2

0.5 volt or 10% of WOT sensor voltage

Question 3

What voltage will be measured at terminal "C" as shown?

A)Not enough information
B)4.5 volts
C)12 volts
D)0.5 volts

Answer 3

0.5 volts

Question 4

Which of these components lets the PCM (Powertrain Control Module) know how fast you want to accelerate?

A)Idle air control valve
B)CKP (Crankshaft Position) Sensor
C)O₂S (Oxygen Sensor)
D)Throttle Position (TP) Sensor

Question 5

The third terminal of a potentiometer is attached to a movable contact that slides across the resistor to vary ________.

A)Thermistor
B)Potentiometer
C)Thyristor
D)Resistance

Question 6

A ________ is a variable-resistance sensor with three terminals.

A)Thermistor
B)Thyristor
C)Rheostat
D)Potentiometer

Question 7

A typical TP sensor registers about how many volts at WOT (wide open throttle)?

A)13-15
B)1.3-3.0
C)0.5
D)4.5

Question 8

Technician A says that the TP sensor signal voltage should be about 0.5 volt at idle and increase to about 2.5 volts at wide-open throttle (WOT). Technician B says A TP sensor can be tested using a DMM, DSO, or scan tool. Who is right?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 9

Technician A says that the 3 wires on the TP sensor include a 5-volt reference voltage from PCM, plus the signal wire to PCM, and a ground wire to the engine block. Technician B says that the TP sensor is used by the PCM to determine torque converter engagement and transmission shift points. Who is right?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 10

A technician attaches one lead of a digital voltmeter to the ground terminal of the TP sensor and the other meter lead to the negative terminal of the battery. The ignition is turned on, engine off, and the meter displays 37.3 mV. Technician A says this is the signal voltage and is a little low. Technician B says the TP sensor ground circuit has excessive resistance. Who is right?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B