Throttle position sensor
- This sensor informs the ECU the throttle position and uses this input to change the spark timing and fuel mixture as the engine load changes, when the throttle is on idle the voltage is around 0.618 and when the throttle is wide open(accelerate) the voltage will rise to 4.1v(from the engine we look at)
Inputs/outputs
-These are referred to the communication between a information processing system(like the ECU or a computer we uses everyday) inputs are the signals recived by the system(sensor/compoent) and the outputs are the signal thats sent from it. For a car the sensors in the car does the meassuring of temp/viration/air and sends the info to the ECU and outputs the needed performance and driveability to the very best at its certain situation
open loop/close loop
-An open loop is a controller that does not uses the feedback from the inputs to determine the outputof the processes that it is controlling,it can not correct the error/faults that it could make,as in the engine the ECU is not using any data/signal from the O2 sensor and progress itself! things could go wrong if any one of the sensor is the funtioning properly,this could led to the car not running at all and also it will not switch to close loop mode.
- Close loop is when the car is on idle or driving very slow like cruising.
throtte body sensor
-this sensor is a to monitor the throtte in the combustion camber,it tell you the angel of the throtte is at so the ECU will know how much power to produce for the vehicle to run.
AIR thermistor
- this is a sensor that measures temp in air for the ECU to know if the vehicle needed more or less air,the votlage for the cold engine is 1.473v and when is wormed its 3.25v
water thermistor
-this measures the temp for water, the ECU needs to know how much fuel the engine needs.when the engine is cold the temp is 3.387v and a warmed up engine is 1.08v
MAP sensor A.K.A manifold absoulute pressure sensor
-this sensor meassure the pressure in the intake manilfold,you will most likely to find this sensor near the throtte body, when the engine is cold the voltage of this is 1.784v and when its warmed it decreased to 0.370v,the sensor has 4 main compoent, one is the ground,output voltage, 5 volt input and the vacuumfitting.
crankshaft sensor
- the crankshaft sensor is to position the crankshaft, the ecu uses them info to transmitted by sensor to control such as ignition timing,fuel injector timing.
