Help Problems with 402cid Cam positioning sensor "CPS" harness , not reading RPMS !!
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Correct me if I'm wrong, but the first pic is the Katech harness and the second pic is the lower connector on the front cover. If so, you're testing the wrong connectors. You need to completely disconnect and remove the Katech harness and test the OEM/original connector located by the firewall.
Here is a crude diagram that should help pinpoint the issue.
Here is a crude diagram that should help pinpoint the issue.
thanks
i unpluged the socket from the front part of the pcm , the red socket and then try to go where where the pin in socket 39 would be and then trace it to the red wire on the CPS plug in aand see what im getting on the meter and see if it beeps for condinuty ?????? would this work ?
if im not getting anything from the red wire off 39 then it sounds like im going to have to somehow splice a new red wire in there somehow for my 12v
Last edited by BadLtBlu99TA; 06-23-2008 at 12:27 AM.
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I unplugged the socket from the front part of the pcm , the red socket and then try to go where where the pin in socket 39 would be and then trace it to the red wire on the CPS plug in aand see what im getting on the meter and see if it beeps for condinuty ?????? would this work ?
if im not getting anything from the red wire off 39 then it sounds like im going to have to somehow splice a new red wire in there somehow for my 12v
* Is the cam sensor in good condition? It should never come in contact with the cam gear itself. Post a pic if possible.
* Make sure the red socket has a solid connection to the PCM itself.
* Please list all of the DTC's that are set.
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This...
and this...
Still points the wiring in between the PCM and connector itself. You may have to trace the red wire from PIN # 39 on the red PCM socket all the way to factory connector and look for a burnt wire.
i checked all the wire and im not getting 12v to the CPS but I have 12v at the pcm at connector 39, but not at the sensor.
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Can i splice a new red wire at the PCM and tie it to the cam sensor harness or what should i do here ? cause i cannot get any voltage ..
No im not showing any voltage , but what would make the RPM and the MPH gagues both go all the way up when the car is first started and then the RPM drop down to zero and stay there ? would that just be the signal wire from the Cam position sensor ? the brown wire or what ??
First off i really dont want to splice a new wire in here thats why i wanna confirm that pin #39 is for sure where the red wire is on the pcm ?, but i cant trace the Red wire all the way cause its in the black factory coating and the engines installed and really i dont feel like uninstalling everything for a cam positioning wire ..
I might sound like a dumb *** when it come to all this but i have no clue at all about any of this , im not a wiring man what so ever thats why i perfer not to do this ..... but somthign heres gotta give , i've tryed to cam sensors and neither one worked , theres a tan colored cam sensor and a black colored cam sensor ..
Last edited by BadLtBlu99TA; 06-23-2008 at 11:16 PM.
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What is the Pin layout ? how could i find it on here ?? cause im not understanding how i dont get 12V to the red wire on the PCM harness for the cam positioning sensor it just dont make sense since it worked on my stock ls1 and now it dont work on this engine ...
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thanks again man !!! im going to try and figure this out soon i've just been working long hours then comming home getting all mixed up on this and its not mixing so i'll probally check it out this weekend
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IF i had to it would be nice to be able to switch the 12V wire out directly in the PCM with the Pin and connect it to the harness also too .. i have a haynes book for this car , but it dont help too much on the wireing harness for the cam sensor cause i already know where the wires are going ..
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OK were going to end this post ... I figured it all out everyone !!, and thanks again for all your help with this .. one last question is how useful are the knock sensors with the 402 ?
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yeah i think i will have to .. but only thing i gotta do now is figure out how im going to run my knock sensors since the harness for that is up aginst the firewall .
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What was the problem in the end?
I'm having a similar issue at the moment with a P0343 DTC that I can't figure out. Cam bolts are tight, cam sensor replaced, wiring checked out ok. I'm running out of ideas!
I'm having a similar issue at the moment with a P0343 DTC that I can't figure out. Cam bolts are tight, cam sensor replaced, wiring checked out ok. I'm running out of ideas!