Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
One should have a permanent battery voltage feed with the engine cranking or running. Another wire is a permanent ground. The third wire, with a smaller diameter, carries the activation or trigger signal from the pcm to the ignition module which is integrated into the coil.
Being this type of coil you will not be able to capture primary ignition voltage. You can capture the trigger signal on that 3rd, smaller wire, typically it's around 3,5 to 4,5 volts.
If you had an amp clamp you would be able to measure primary current, hooking up to anyone of the permanent feed or ground wire at one time will allow this.
Without a dedicated probe you still can get a secondary ignition voltage capture: just place the tip of your test lead around or on top of the coil. Then move it a little bit to figure out where the signal is strongest. Laying a penny/coin on top of the coil and holding the probe to it will enhance the signal further.
Obviously this secondary capture would not be voltage scaled properly.
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
You also can look up procedures within in the components test menu of your Verus'. You'll find car specific informations on components, wires, how to connect and so much more. A really helpful option to get you going with scoping.
An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.
Thank you so much, yes I was looking at my verus and my only concern is that do I need an attenuator so it doesn't smoke my scanner? Or not need it
So I can backprobre any coil? Cause the misfire is on the cilynder #2 witch is very convenient right off front of me and I do have a low amp probe
Thanks again
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