Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

EJ22 fan/ecu Coolant temp sensor


  • Please log in to reply
19 replies to this topic

#1 Rooster2

Rooster2

    Subaru Master

  • Members
  • 4,077 posts
  • Indianapolis

Posted 14 April 2012 - 02:14 PM

I am having a devil of a time replacing the ecu coolant temp sensor on my EJ 22. My problem is how to disconnect the electrical connector. The unit is buried so deep down on the side of the motor, that there is very little room to work or see how to disconnect the connector. Anyone know, is it a push down on a lever, or pull up on a tab to separate the connector? After spending an hour fooling with it, and practicing on other electrical connectors to see how they release, I am still stuck. Anyone know "the secret hand shake" to get the connector to separate?

Thanks...........I am really frustrated at the moment!!!!!!

#2 987687

987687

    Rally Suby!

  • Members
  • 3,764 posts
  • Northern Maine

Posted 14 April 2012 - 03:03 PM

Yea, IIRC it's the kind you push the tab of the back and the locking piece comes up. You might have to get a screwdriver in there to pry the connector off the sensor.

If you remove the IACV it adds quite a bit of clearance to get at it.
That's a really crappy one to access with the intake manifold on :(

Another trick is to spray PB blaster at it. Connectors can get gritted up and don't want to come loose sometimes.
Sometimes you have to push the connector in first, then pust the tab down because the locking bit gets bound up.

#3 Rooster2

Rooster2

    Subaru Master

  • Members
  • 4,077 posts
  • Indianapolis

Posted 14 April 2012 - 09:12 PM

Yea, IIRC it's the kind you push the tab of the back and the locking piece comes up. You might have to get a screwdriver in there to pry the connector off the sensor.

If you remove the IACV it adds quite a bit of clearance to get at it.
That's a really crappy one to access with the intake manifold on :(

Another trick is to spray PB blaster at it. Connectors can get gritted up and don't want to come loose sometimes.
Sometimes you have to push the connector in first, then pust the tab down because the locking bit gets bound up.


I will try all of the above. Thanks for the advise, I really appreciate it. I am thinking about using a very small screw driver blade, or very small knife blade to unlock the connector. Then, if no success, I will remove the IACV. What a PITA. Glad I bought a deep well 19 MM socket for sensor removal. I can see that it will be necessary to use that socket.

Edited by Rooster2, 14 April 2012 - 09:15 PM.
added more info


#4 lmdew

lmdew

    _______

  • Members
  • 3,256 posts
  • Colorado Springs

Posted 14 April 2012 - 09:23 PM

I usually end up using a pliers to push down on the locking release tabs.

#5 987687

987687

    Rally Suby!

  • Members
  • 3,764 posts
  • Northern Maine

Posted 14 April 2012 - 09:46 PM

I usually end up using a pliers to push down on the locking release tabs.


Yea, pliers on the release tab, big flat blade screwdriver to push the connector off the sensor.
Just be careful not to squash the connector with the pliers.

#6 Rooster2

Rooster2

    Subaru Master

  • Members
  • 4,077 posts
  • Indianapolis

Posted 15 April 2012 - 11:45 AM

Thanks guys............I appreciate the advise!!

#7 Rooster2

Rooster2

    Subaru Master

  • Members
  • 4,077 posts
  • Indianapolis

Posted 16 April 2012 - 12:06 PM

I still don't have the sensor removed. I considered removing the IACV to add to the work space area, but looking at the IACV, it has a paper gasket sealing it to the block. I am reluctant to remove for fear of ruining the paper gasket. Any thoughts??

I have a buddy coming over tonight to help me. I hope he is smarting then me, in figuring out how to release the connector.

Thanks for all the replies..........Rooster2

#8 987687

987687

    Rally Suby!

  • Members
  • 3,764 posts
  • Northern Maine

Posted 16 April 2012 - 12:10 PM

Get a new gasket and clean the IACV while it's off.

#9 Olnick

Olnick

    Ol' Subaru Guy

  • Members
  • 2,762 posts
  • Honolulu HI

Posted 16 April 2012 - 12:19 PM

Get a new gasket and clean the IACV while it's off.


^ +1 ^ It's a great opportunity!

#10 ShawnW

ShawnW

    Subaru Master Technician

  • Administrator
  • 12,944 posts
  • Denver, Colorado

Posted 16 April 2012 - 07:44 PM

Remove the PCV tube from the top of the block. IT might crack but I find that easier.

#11 Rooster2

Rooster2

    Subaru Master

  • Members
  • 4,077 posts
  • Indianapolis

Posted 16 April 2012 - 09:46 PM

I got the temp sensor swapped out tonight. A friend came over, who is smarter then me. He got the connector to disconnect in about 30 seconds. It is all about where, and how to unlatch the connector.

Yes, on reassembly, the big PVC hose that connects to the block was as hard as rock, and would not flex to attach to the tube on the block. A trip to AZ worked great. The counter man gave me a small replacement section of hose free gratis. That would never happen at a stealership. All is reassembled, 2.2 motor is running well.

Thanks for all the advise. I really appreciated it!!

#12 Rooster2

Rooster2

    Subaru Master

  • Members
  • 4,077 posts
  • Indianapolis

Posted 17 April 2012 - 07:19 PM

Nope..........not fixed yet. The sensor I installed must be bad. Acts like it doesn't work at all. Car barely starts, no power till it warms up. Will install another sensor tomorrow. I hate doing the same job twice in two days! I bought a Borg Warner sensor from Advance Auto. Even new parts can be bad.

#13 987687

987687

    Rally Suby!

  • Members
  • 3,764 posts
  • Northern Maine

Posted 17 April 2012 - 07:37 PM

Are you sure that's the problem? If it's obd2, plug in a scantool and see what the temp sensor is doing.

#14 Rooster2

Rooster2

    Subaru Master

  • Members
  • 4,077 posts
  • Indianapolis

Posted 18 April 2012 - 07:43 AM

Are you sure that's the problem? If it's obd2, plug in a scantool and see what the temp sensor is doing.


I did this. New sensor is tripping a code, saying it is defective.

#15 Gloyale

Gloyale

    It's a sickness

  • Members
  • 9,816 posts
  • Corvallis, OR PNW

Posted 18 April 2012 - 10:26 AM

Test the resistance on the sensor.

3000+ohms when cold

200-500 ohms warmed up to 190

anything over 5000 or under 200 indicates it's bad.


I'm doubtful the new one is bad.

I'm guessing it's a problem in the circuit.

#16 Rooster2

Rooster2

    Subaru Master

  • Members
  • 4,077 posts
  • Indianapolis

Posted 18 April 2012 - 12:29 PM

Test the resistance on the sensor.

3000+ohms when cold

200-500 ohms warmed up to 190

anything over 5000 or under 200 indicates it's bad.


I'm doubtful the new one is bad.

I'm guessing it's a problem in the circuit.


Good thoughts.............Thanks!!

#17 987687

987687

    Rally Suby!

  • Members
  • 3,764 posts
  • Northern Maine

Posted 18 April 2012 - 01:40 PM

With obd2, the scantool should be able to tell what temp the computer is seeing from the sensor.

#18 Cougar

Cougar

    Elite Master of the Subaru

  • Members
  • 6,425 posts
  • Anchorage

Posted 18 April 2012 - 04:25 PM

I agree with Gloyale. There is most likely a circuit problem rather than a bad new sensor issue. It would help to know what the code was. If it talks about a circuit issue then the wires to the ECU need to be checked along with the connection to the sensor.

#19 Rooster2

Rooster2

    Subaru Master

  • Members
  • 4,077 posts
  • Indianapolis

Posted 19 April 2012 - 05:16 PM

Well, I finally got around to swapping in another coolant temp sensor, and that fixed the problem.

The sensor I installed last Monday was bad.....way bad. Yep, even a new sensor fresh out of it's box can be sold to you bad. No problem swapping out parts with Advance Auto at no cost. They treat me really well.

#20 Cougar

Cougar

    Elite Master of the Subaru

  • Members
  • 6,425 posts
  • Anchorage

Posted 19 April 2012 - 05:48 PM

Good deal. Thanks for the update.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users