I would try all what Ben advised and also unplug the sensor as you suggest, to see if the signals will both go high. If the bearing is not an active actuator itself but a sensor only, and as you said there are two potentiometers, it sounds like a double signal sensor, as back up like design where th...

Hi flaurits, Here is my explanation: First how such sensor/device works. (I may be wrong as I have never seen such machine) If it is what I think, many such applications are in passenger cars. There is a PWM signal from the ECU which is desired position of the device, then the device carry out the t...

Hi, The best practice to find out where the spikes come from is to use other channel and read other signals. For example if the injectors would be the spike sources, the signal (falling or rising edge) would always match the spike on the original signal (here it would be your alternator ripple wavef...

Thank you for the update.
If you would have time, please try to upload the waveform here.
It will help many other Picoscope users as we all need to learn.
And this forum here is the best place to share our stories from real diagnostic situations.
Best Regards,
Roman

Hi Josh, I have personal experience from Bentley dealerships where noise is extremely important to customers as the expectation is far higher than at premium brands as Mercedes or Audi. The NVH plays major role in decision and demonstration to customer (printed report) where customer feels the "nois...

Hi Mike, Thank you for the question, you are right as I did not properly explain how I got to the numbers. Engine firing order is 1-5-3-6-2-4 and I had the COP pick up probe on Cyl 1, then just by first look on the NVH sensors the highest amplitude was visible and I have marked it by rulers to range...

Let's say if the channel A probe positive goes to one of the two wires on the crank sensor and the same probe Ch A negative side on the second sensor wire. The scope should measure the voltage across this two wires. However, there is not positive or negative side as it is basically AC signal. Then o...

Hi, I am looking at your picture and here is my interpretation. (correct or not, we always find later) There are regular waves and two spikes repeating in the waveform. Let's say the waves are matching the alternator rotation and windings modulated by diods, then the alternator operation has predict...

I think the best way is to follow the Guided functions, Sensors, Crankshaft sensors and i believe it is safer to use the floating running sensor to start with. Guided function Crankshaft sensor.jpg I am usually setting the scope to DC but AC is not wrong, actually mostly recomended. See the connecti...

Hi, I have never heard anything like that. The only explanation would be if t you have connected the ground side to sensor but I am sure you didn't. Assuming you have all the negative leads on battery, scope set to DC coupling and connect the signal sensor wire to positive lead. If the sensor is two...