WS3

MAP (digital) 2 volts per division/ 1sec per division.
On idle the vacuum is high and the voltage is low. (as you can see in the photo) As you rev the engine the vacuum becomes low and the voltage increases. (also in labeled diagram).

O2 sensor. The O2 sensor doesn't operate until it is in open loop. (operating temp) When the car is in open loop it starts to function an fluctuates controlling emissions. Also it picks up how much O2 is passing through and tells the ECU if its running rich or lean and compensates next time around.

Injector petrol 20v per division 200ms.
Injectors are actuators and receive a pwm signal from the ECU to tell them when to open and close and how long for. In the photo it shows voltage supply to the injector then at 0volts the injector is earthed (turned on) then a back EMF caused by the quick colapse of voltage then returns to voltage supply. at voltage supply injector is closed.

Idle air control. (ISC solenoid)
This controls air at idle so the vehicle wont stall. Its a constant pattern because its opening and closing. As the car revs higher the frequency that it ocurrs gets faster so the wave form stays the same shape but gets smaller or wider.

RPM (hall digital)
The RPM wave form is digital and it is rectangle shape. All patterns are the same meaning they contantly reach the 0 voltage and the same high (positive) voltage. As the RPM increases the pattern becomes more frequent meaning the the distributor is spining faster and the waveform becomes more narrow.


RPM (Magnetic) 2 volts 20ms. (ckp magnetic)
The RPM wave form is analog even though it doesn't look like this is because the shape of the rotor. This wave form is constant in it shape becauses its spining in a constant circle. As we rev the engine the wave form is still the same shape but becomes move frequent. (as seen in video)

Ignition primary 10v 5ms. (primary waveform)
The low voltage reading is the dwell time (the build up time) then it suddenly collapses an creates a high voltage to cross the spark plug gap. The oscilations after is the burn time then returns to supply voltage.