Results 1 to 11 of 11

Need ECT schematic for '02 WS6

This is a discussion on Need ECT schematic for '02 WS6 within the General Help forums, part of the LSx Technical Help Section category; My ECT sensor is malfunctioning while the car is cold. The dash gauge flops between dead cold and 140-150*, back ...

  1. #1
    Just another Joe Eagle's Avatar
    Join Date
    Mar 2007
    Location
    NW Chitown
    Posts
    757

    Pewter
    2002 WS6

    Need ECT schematic for '02 WS6

    My ECT sensor is malfunctioning while the car is cold. The dash gauge flops between dead cold and 140-150*, back and forth, causing idle to surge. I need to know which pins @ the PCM = the two wires at the ECT (Engine Coolant Temp) sensor.

    Help?

    -Eagle

  2. #2
    Senior Member
    Join Date
    Jul 2005
    Location
    Jacksonville, FL
    Posts
    2,725

  3. #3
    Just another Joe Eagle's Avatar
    Join Date
    Mar 2007
    Location
    NW Chitown
    Posts
    757

    Pewter
    2002 WS6

    Thanks NBM!!! Thats a great resource right there.

    C1/74 YEL is one of the two wires @ the ECT which connect to the PCM. Is it safe to assume the other wire connects to ground?

    You have any more links for schematics?

    -Eagle

  4. #4
    Senior Member
    Join Date
    Jul 2005
    Location
    Jacksonville, FL
    Posts
    2,725
    This has a circuit diagram description for a 2K - appears to be the same. www.gearchatter.com/viewtopic9062.php

  5. #5
    Just another Joe Eagle's Avatar
    Join Date
    Mar 2007
    Location
    NW Chitown
    Posts
    757

    Pewter
    2002 WS6

    So it seems that C1/74 YEL and C1/80 BLK are the two wires I'm working with here, and that C1/80 indeed is a ground. NBM, you're the man.

    Last question... how do I determine where the PCM gets the ground feed from for that C1/80 wire? Perhaps its lost the ground to properly close the circuit causing this weird behavior until the engine is warmed up?

    -Eagle

  6. #6
    Senior Member
    Join Date
    Jul 2005
    Location
    Jacksonville, FL
    Posts
    2,725
    Sorry, don't know - maybe someone will chime in. Wherever it comes from it's circuit 407, same as pins 53 and 54.

  7. #7
    Just another Joe Eagle's Avatar
    Join Date
    Mar 2007
    Location
    NW Chitown
    Posts
    757

    Pewter
    2002 WS6

    So tonight I pulled out the PCM with the intent of testing the connections to the ECT sensor. But when I pulled off the connections I found this:



    and this:



    Cleaned it all out... I used a little bit of a light hobby wire brush, I used a metric shit ton of qtips and rubbing alky to clean out all the gook from the PCM, and then I used B-12 cleaner and compressed air to clean out the connector. I then took a lil tool I had from MIG welding, and cleaned out the INSIDE of each pin on that side of the blu connector to the PCM. Started it back up after everything was back in place, and it purrrrrrs like a kitten.

    Turns out the blue connector's gasket was slightly out of place and was allowing in moisture. Is there any additional methods for weather proofing the PCM (seeing as it sits right under the rain gutter @ the passenger front windshield...

    UGH.

    -Eagle

  8. #8
    Senior Member
    Join Date
    Jul 2005
    Location
    Jacksonville, FL
    Posts
    2,725
    Wow, surprised you didn't have other issues other than the ECT. You could get a PCM cover a lot of guys use to dress up the engine compartment, don't know how watertight they are though. www.ls1.com/forums/showthread.php?t=53026

  9. #9
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,468

    98 Formula
    06 duramax

    glad you got this worked out. If the gasket is in place properly I don't see why it wouldn't do it's job and keep moisture out. Was the gasket crushed at all? Might be able to just replace it with a new one and make sure it's installed correctly and be good to go.

  10. #10
    Just another Joe Eagle's Avatar
    Join Date
    Mar 2007
    Location
    NW Chitown
    Posts
    757

    Pewter
    2002 WS6

    Quote Originally Posted by 0rion View Post
    glad you got this worked out. If the gasket is in place properly I don't see why it wouldn't do it's job and keep moisture out. Was the gasket crushed at all? Might be able to just replace it with a new one and make sure it's installed correctly and be good to go.
    Yeah, thanks Orion! This issue had been plaguing me for over a month now... SO glad to finally have it licked.

    On the bright side, I bought a copy of HPTuner Pro and gave the wife the excuse that it would help diagnose the issue! Two days after making the purchase, I found the problem.

    -Eagle

  11. #11
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,468

    98 Formula
    06 duramax

    seems like hptuners must've played some part in getting it fixed then.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. What makes a ws6 a ws6???
    By whiteLS1TA in forum Firebird / WS6
    Replies: 40
    Last Post: 05-20-2007, 07:28 PM
  2. Replies: 64
    Last Post: 04-13-2007, 05:31 AM
  3. 98-02 ws6 hood and ws6 embem
    By gmpower in forum Parts For Sale / Trade
    Replies: 21
    Last Post: 02-28-2006, 03:52 PM
  4. Difference between 98 Formula WS6 Regular WS6
    By thestaton in forum Firebird / WS6
    Replies: 25
    Last Post: 10-22-2005, 01:04 PM
  5. wtt new suncoast ws6 hood and air box for oe ws6 hood or $
    By ws6_nightcat in forum Parts For Sale / Trade
    Replies: 2
    Last Post: 10-20-2005, 05:21 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •