Deck 16: Throttle Position Tp Sensors

Question 1

Typical TP sensor voltage at idle is about ________.

A) 13.5 to 15.0 volts
B) 1.5 to 2.8 volts
C) 2.50 to 2.80 volts
D) 0.5 volt or 10% of WOT TP sensor voltage

Answer 1

D

Question 2

The TP sensor effects the operation of all of these EXCEPT ________.

A) torque converter clutch operation
B) determining rich and lean air-fuel mixtures
C) air conditioning compressor operation
D) clear flood mode operation

Answer 2

B

Question 3

Technician A says that the 3 wires on the TP sensor include a 5-volt reference voltage from the PCM Technician B says that a TP sensor is a three-wire variable resistor called a rheostat. Which technician is correct?

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

Answer 3

A

Question 4

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 ground. Technician B says that the TP sensor is used by the PCM to determine torque converter engagement and transmission shift points. Which technician is correct?

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

Question 5

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 that a TP sensor can be tested using a DMM (digital multimeter), DSO (digital storage oscilloscope), or scan tool. Which technician is correct?

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

Question 6

A voltage drop of more than 0.2 volts between the TP sensor ground and engine ground indicates a bad ________.

A) oxygen (O2S) sensor
B) ECT sensor
C) PCM ground
D) IAT sensor

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

Which of the following is a three-wire variable sensor?

A) Thermistor
B) Potentiometer
C) Coolant temperature sensor (CTS)
D) Rheostat

Question 9

The TP sensor indicates the engine is idling but the MAP sensor indicates the engine is under a heavy load. This could cause a DTC to set for the ________.

A) TP sensor
B) MAP sensor
C) Either A or B
D) Neither A nor B

Question 10

With the TP sensor in the position shown, what voltage would be expected at the signal wire (C)?

A) 5.0 volts
B) 0.5 volts
C) 2.5 volts
D) Not enough information

Question 11

A TP sensor is being backprobed. The meter reading shows that the technician is measuring ________.

A) Idle voltage
B) WOT voltage
C) Reference voltage
D) Signal voltage