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Ultimate Carjunky / Moderator
Discretesignals profile image

Jul 10, 2011, 2:19 PM

Post #1 of 2 (2862 views)

2000 Honda Passport or Isuzu Rodeo 3.2L

I really don't have detailed knowledge about the ION ignition systems or the physics that is involved, but I ran into a thread were the OP was looking for the knock sensor.

My source data shows the labor time and part cost for a knock sensor, but no procedure or description of the part. I looked at the wiring diagram for the ION module and the PCM. It appears that the ION module has the capability of detecting knocks and sending a signal to the PCM via toggling a transistor in a pull down circuit.

Is this true that ION ignition systems on these vehicles don't utilize a physical knock sensor? Any information would be greatly appreciated.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jul 10, 2011, 2:21 PM)

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 10, 2011, 3:14 PM

Post #2 of 2 (2849 views)
Re: ION SENSING IGNITION [In reply to] Sign In

It appears that the ION module is simply an ignition module. It turns the COPs off and on with commands from the PCM.


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