connections

  • nahulak3
  • Topic Author
  • Offline
  • New Member
  • New Member
More
07 Mar 2021 03:12 #47281 by nahulak3
connections was created by nahulak3
When connecting the Picoscope to measure crankshaft sensor which is an inductive sensor and both sensor wires goes to the PCM (+ and -). Which wire do you use to see pattern on scope?

Please Log in or Create an account to join the conversation.

  • Chad
  • Chad's Avatar
  • Offline
  • Moderator
  • Moderator
  • I am not a parts changer.
More
07 Mar 2021 09:56 #47282 by Chad
Replied by Chad on topic connections
This depends on internal PCM circuit design. If the (-) is a true ground, the signal will be only on the (+) wire. IF the the circuit uses a "floating" ground, you will see a signal on BOTH wires, but the oscillations will mirror each other, rather than line-up/stack.

You can connect your scope a couple different ways. If you ground/reference your scope to battery (-), you can use two scope channels and watch both wires (Sensor (-) and (+) )at the same time. Or, you can ground/reference you scope the to the Sensor (-) and use a single channel on the sensor (+).

"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."

I have learned more by being wrong, than I have by being right. :)
The following user(s) said Thank You: Noah, Andy.MacFadyen, nahulak3

Please Log in or Create an account to join the conversation.

  • Not Allowed: to create new topic.
  • Not Allowed: to reply.
  • Not Allowed: to edit your message.
Time to create page: 0.258 seconds