Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
39 Cards in this Set
- Front
- Back
This sensor tells the exact location of the accelerator pedal. |
Accelerator Pedal Position (APP) Sensor |
|
The process of changing analog voltage signals to digital signals. |
Analog/Digital Conversion |
|
A voltage signal that is usually produced by input sensors and is continuously variable within a certain voltage range. |
Analog Voltage Signal |
|
A group of numbers assigned to digital voltage signals. |
Binary Coding |
|
Informs the computer that there is no load on the engine, as well as prevents the engine from starting unless the clutch is depressed. |
Clutch Pedal Position (CPP) Switch |
|
A voltage signal that is either on or off, high or low. |
Digital Voltage Signal |
|
An input sensor that sends a voltage signal to the computer in relation to coolant temperature. |
Engine Coolant Temperature (ECT) Sensor |
|
A valve that dilutes the intake charge with spent exhaust in order to cool combustion chamber temperatures. |
Exhaust Gas Recirculation (EGR) Valve |
|
A term used to describe a PCM's ability to control the activity of an actuator in response to input from sensors. |
Feedback |
|
Informs the PCM of the pressure inside the fuel tank for EVAP system tests. |
Fuel Tank Vapor Pressure Sensor |
|
A sensor that sends a voltage signal to the computer in relation to engine detonation. |
Knock Sensor (KS) |
|
Has the advantage of no contacts to wear or corrode and is referred to as a non-contact TP sensor. |
Linear Hall-Effect TP Sensor |
|
An input sensor that sends a voltage signal to the computer in relation to intake manifold vacuum. |
Manifold Absolute Pressure (MAP) Sensor |
|
A thermistor that reduces its resistance as temperature decreases. |
Negative Temperature Coefficient (NTC) |
|
An input sensor that sends a voltage signal to the computer in relation to the amount of oxygen in the exhaust stream. |
Oxygen (0²) Sensor |
|
Informs the computer regarding gear selector position. |
Park Neutral Position (PNP) Switch |
|
Sensors that measure pressure changes. |
Piezoresistive |
|
A thermistor that increases its resistance as temperature increases. |
Positive Temperature Coefficient (PTC) |
|
A potentiometer with a pointer that is rotated by the throttle shaft that informs the PCM of the throttle position by varying voltage. |
Rotary-type Throttle Position (TP) Sensor |
|
This is used to control the throttle opening by the PCM. It has often been called "throttle by wire". |
Throttle Actuator Control (TAC) |
|
A sensor that is usually mounted in the transmission and sends a voltage signal to the computer in relation to the vehicle speed. |
Vehicle Speed Sensor (VSS) |
|
Digital devices will not operate with _?_ voltage inputs. |
Analog |
|
A digital voltage signal may be called a _?_ signal. |
Square-Wave |
|
The term binary means _?_ values. |
Two |
|
A reference voltage sensor provides input by _?_ or _?_ a constant, predetermined voltage signal. |
Modifying, Controlling |
|
There are two basic types of thermistors: _?_ and _?_. |
NTC, PTC |
|
In an 0² sensor, lean conditions produce _?_ voltage. |
Low (around 0.2 volts) |
|
If the coolant temperature increases, the voltage drop across the engine coolant temperature (ETC) sensor _?_. |
Decreases |
|
The crankshaft position (CKP) sensor indicates the _?_ of the engine and the crankshaft _?_. |
RPM, Position |
|
The air-fuel (A/F) ratio sensor operates at _?_, about twice as hot as the conventional oxygen sensor. |
1,200 F° |
|
Tech A says that an analog signal is variable within a given voltage range. Tech B says that a digital signal is either on or off. Who is correct? |
Both Techs. |
|
Tech A says that the TP sensor is a reference voltage sensor. Tech B says that the oxygen sensor is a voltage generating sensor. Who is correct? |
Both Techs. |
|
The signal from most sensors must be amplified and converted from? |
Analog to digital. |
|
Tech A says that computer feedback is information sent back to the computer to confirm that a command was carried out by the actuator. Tech B says that feedback can also be in the form of a monitored voltage signal to a switch or relay. Who is correct? |
Both Techs. |
|
Tech A says that the air intake temperature (IAT) sensor signal is very similar to the engine coolant temperature signal. Tech B says that cold intake air is denser than warm air. Who is correct? |
Both Techs. |
|
Tech A says that the hall-effect switch contains an electromagnet. Tech B says that the hall-effect switch also uses a shutter wheel connected to a rotational component. Who is correct? |
Tech B. |
|
Tech A says that the oxygen sensor produces a high voltage signal when the exhaust is lean. Tech B says that the oxygen sensor produces a low voltage signal when the exhaust is rich. Who is correct? |
Neither. High voltage=Rich, Low Voltage=Lean. |
|
Tech A says that the air-fuel ratio sensor produces below 3.3 volts in a negative direction when the exhaust is rich. Tech B says that the air-fuel ratio sensor operates at a lower temperature than the conventional oxygen sensor. Who is correct? |
Tech A |
|
Tech A says that the intake air temperature (IAT) sensor is a voltage generating sensor. Tech B says that the MAF sensor is a reference voltage sensor. Who is correct? |
Neither. IAT is a voltage reference sensor. |