Signal Name MAP
volt/divsion/range 1.923v
Time/divsion/range 50m/s
That pic it showing the MAP sensor back probe with the pin into the wire of the Map Sensors the using the oscillscape on the MAP sensor and black lead on the battery of earth.
The MAP sensors singal when the throttle on an idling engine is snapped and it open and shut but no change would indicated a sensors or the wire fualts
with the 5v to the map sensors, the output voltages of analog should drop. not over 5vs of map sensors.
the fault could make the MAP operate incorreclty is open ciurits,high resictance,could be the loads
short ground and feedback.. Rough idle.
* A rich fuel condition, which may cause spark plug failed.
* maybe due to too much spark advance and a lean fuel ratio. when you unplug the map sensor it wont start the engine when it unplugged.
Toyota
Signal Name MAF
volt/divsion/range 1.923v
Time/divsion/range 50m/s
MAF is a Mass Airflow it litte bit relate to the fuel injection system. it has two basic things which is hot wire and hot firms. but differnt degsin of sensors measure the volume of the air enter the eingine to theECU and it can be calcauted by it self to know how mch the fuel is needed to work the right fuel mixture with air the fuel.
The fualts for the MAF sensor can be hard to start the egine , maybe with loads and idle shaking like rough. somtime it can run with the fuel to rich or lean.The MAF sensor have no moving parts.
Toyota
Signal Name TPS
volt/divsion/range 13.13v
Time/divsion/range 50m/s
This is a throttle Position Sensors
That pic it showing the TPS sensor back probe with the pin into the wire of the TPS Sensors the using the oscillscape on the TPS sensor and black lead on the the ground. The TPS has resistor in it that chnages the restienice as the throttle open. by then singals the ECU when the throttle opens so then ECU can richen up the fuel mixture to work the proper air and fuel.. if the TPS goes in the ECU they wil think the throttle is closed all the time. The result of the fuel mixure wil be too lean and it mite get fualt code that it wil effect to the voltages singal that it thinks it too low to work. Some time it can effect the speeds and the idle systems.The throttle pisiton has a feedback to singal the ECU so they know what they are doing and everything working right.Toyota
Signal Name ECT
volt/divsion/range 1.09v
Time/divsion/range 20m/s
Sorry Sir couldnt take the pics of the coolant because doesnt work in the classroom engine because it not strong enough..
ECT is a moniter like check or look atfer the temperature of the engine. i saw the engine coolant inside the
einge block and cylinder heads and it takes all the heats from the cylinder when the engine is running.The Engine coolant sensors changed the tempature and the singals ECU so it can tell if the engine is cold and warming up at the normal operating temperature or overheating.The engine coolant sensor it very important 2 me beascasue the sensor can affect the ECU and operating then a life time of the engine managment system.The most problem withe coolant sensor problems is often due to the wire and loosec connectors.The ECT jobs does cooling the engine by the Fan on and it very important for the engine to keep the temperature low not over heated or you wil damagd the engine.
Toyota
Signal Name IAT
volt/divsion/range 1.07v
Time/divsion/range 20m/s
The IAT sensors checks the temperature of the air enter the engine simlar as ECT the ECU have the inforatmtion to balance of the air and blance the air n fuel mixture. The Coolder air is more dense than the hot air so more likey the engine alway want to stay warm and cold. so the cold air needed more fuel to work the same air and fuel ratio. Some the ECU can change the length of time and injectors.The fualts can the IAT somtimes and also the electrail things can cauased poor or low connection at the sensors or could be the wiring connector like maybe somone cut the wire or somthing so it wil effect the sensors and depending on the volatges how mch is supplying.To find out if the IAT working is turn the meter to restience and see if the reading comes if doesnt that means it damaged.
The IAT sensors checks the temperature of the air enter the engine simlar as ECT the ECU have the inforatmtion to balance of the air and blance the air n fuel mixture. The Coolder air is more dense than the hot air so more likey the engine alway want to stay warm and cold. so the cold air needed more fuel to work the same air and fuel ratio. Some the ECU can change the length of time and injectors.The fualts can the IAT somtimes and also the electrail things can cauased poor or low connection at the sensors or could be the wiring connector like maybe somone cut the wire or somthing so it wil effect the sensors and depending on the volatges how mch is supplying.To find out if the IAT working is turn the meter to restience and see if the reading comes if doesnt that means it damaged.
Toyota
Signal Name Ingniton Primay
volt/divsion/range 1.67v
Time/divsion/range 20m/s
This i was testing the ingiton sytems of the coils of primary one with the oscillope. iT has a very high voltages from 12v to up like thousands n thosands of volts. so it help to the start plug to ingite the engine to work and run. coil to distrubuter to the start plug. the most important is never pull of the plug wire or the coils plug while the engine is running beasuse it has a very high voltage it can kill you if u got heart problems.
This i was testing the ingiton sytems of the coils of primary one with the oscillope. iT has a very high voltages from 12v to up like thousands n thosands of volts. so it help to the start plug to ingite the engine to work and run. coil to distrubuter to the start plug. the most important is never pull of the plug wire or the coils plug while the engine is running beasuse it has a very high voltage it can kill you if u got heart problems.
Toyota
Signal Name Injectors
volt/divsion/range 1.09v
Time/divsion/range 2m/s
Injectors there 4 injectors in normal cars so i was checkin the injectors voltages and how many time it been injected and all 4 injectors takes 12v each one. if some injectors doesnt work beasuse it need some clean up using the injectors machine auto cleans up. The number 2 and 3 cylinder they get hot very easily than the 1 and 4 cylinders
Injectors there 4 injectors in normal cars so i was checkin the injectors voltages and how many time it been injected and all 4 injectors takes 12v each one. if some injectors doesnt work beasuse it need some clean up using the injectors machine auto cleans up. The number 2 and 3 cylinder they get hot very easily than the 1 and 4 cylinders
Toyota
Signal Name MAP Digital
volt/divsion/range 1.41v
Time/divsion/range 5m/s
This when i was testing the MAP digital using the board and probe with the oscillope and revin the throttle and can u see how mch the voltage going throug the MAP it shouldnt be over 5v that it showing the the maps flows depending how mch u rev it up.
Toyota
Signal Name RPM
volt/divsion/range 0.088v
Time/divsion/range 20m/s
That i was testin the disributor and it showing the 4 sparks and how the disturbtor works and how the manngtic rotates and the ingiton coils and that picture is shows for start plugs are firing.
Mercde -ben Common Rail
Signal Name Injector
volt/divsion/range 50v
Time/divsion/range 15m/s
This test waS testin on the disel engine checking out the injectors so i probe the osicillope on the board and find the injector voltage and the flow of it so you see the clyinder injecting it and thevoltages go up when it injector then it down to the ground.
Honda Civi 1996
Signal Name oxgyen sensor
Signal Name oxgyen sensor
volt/divsion/range 0.5v
Time/divsion/range 25m/s
0xygen sensor is located on the mailfold to check how mch is burns on the exhuast as the exit the engine
somtimes the 02 sensor can tel the ECU if the fuel mixture is burning rich or lean. so the 02 sensors is jst checking the exhuast from the manfield and the fuel air mixture.