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
- - - - -

Justy Owners Help


  • Please log in to reply
11 replies to this topic

#1 RONAN

RONAN

    USMB is life!

  • Members
  • 235 posts
  • Cincinnati

Posted 14 July 2006 - 07:52 PM

Temp gauge started to climb on me sitting in traffic today. As long as I was moving the temp was Ok. Got home and let it sit. After it was cooled downed, I checked the radiator for coolant level and found it to be OK. Could`nt find any leaks either. I started the car and let it idle until it got to normal temp and watched. The gauge started to slowly climb higher and noticed that the fan was trying to start but was only bumping on and off. I`m planning on running a temporary feed to the fan to verify that the fan motor is good. I think there should be a relay somewhere but I don`t know the location? Also, where is the temp sensor located ?

#2 RONAN

RONAN

    USMB is life!

  • Members
  • 235 posts
  • Cincinnati

Posted 15 July 2006 - 06:46 PM

Still looking for suggestions???

#3 NorthWet

NorthWet

    Eeyore Incarnate

  • Members
  • 5,039 posts
  • Bremerton, WA

Posted 15 July 2006 - 07:44 PM

The fan apparently shares a temp sensor with the ECU, and this sensor, along with the temp-gauge sender, are located on the intake manifold almost directly under the thermostat outlet.

I don't have a good enough manual, but I suspect that the ECU controls the fan, and that there is a relay somewheres.

#4 ThreeEyedBandit

ThreeEyedBandit

    Eat, Live, Breath Subaru

  • Members
  • 263 posts
  • Central Point Or

Posted 16 July 2006 - 01:18 AM

My 91 FI car has a seperate sensor for the radiator fan on the intake manifold, I am not sure about a carbed car thought. I believe it has a brown plug on it.

Matt

#5 NorthWet

NorthWet

    Eeyore Incarnate

  • Members
  • 5,039 posts
  • Bremerton, WA

Posted 16 July 2006 - 01:34 AM

My 88 carb'd has a temp gauge sender (1-wire) and a 2-wire thermosensor right next to it. Matches what the (blech!!!!) Chilton's says (even if it says one is "left" of the other).

#6 RONAN

RONAN

    USMB is life!

  • Members
  • 235 posts
  • Cincinnati

Posted 31 July 2006 - 11:05 AM

All right, I pulled the fan out and ran temporary wires to verify that it`s not the fan. It ran Ok. Next, I went to my shop manual to locate where the fan relay is. Problem is, my manual is for a 89 Justy and I ran into a snag. The electrical drawing identifies it as being in a row with others up under the dash? I unbolted my dash and pulled back for a look-see and found nothing? Anyone know if the 88 models have a relay and where it might be? I am assuming since my in dash temp gauge is working fine that it should be sending a signal to the ECU and in turn activating the relay??? I`m a novice on Auto electronics and could use some advice on which way to go too solve my delimma??? I`m about ready to throw in the towel and wire the fan in direct, but the car runs a little on the hesitant side until the temperature reaches normal. This will be a problem with the upcoming season change... Anyadvice is surely appreciated. :brow:

#7 RONAN

RONAN

    USMB is life!

  • Members
  • 235 posts
  • Cincinnati

Posted 31 July 2006 - 11:26 AM

Anyone know where the thermoswitch is located ???

#8 RONAN

RONAN

    USMB is life!

  • Members
  • 235 posts
  • Cincinnati

Posted 03 August 2006 - 04:07 PM

All right still banging my head with this. In my urgency I pulled the fan thermo-switch out while the engine was a little on the hot side draining the coolant. Took it to the parts store and they ordered one in for me the next morning. I installed the new one and filled with coolant to start. I turned the key and noticed that my temp gauge started climbing and pegged out before I turned the motor over??? Now I`m thinking that I might have cooked my temp sending unit??? I removed it and with my meter, took a ohm reading 2.06. Then I put it in the freezer and chilled it down and took another and it gave me a reading of .577. I`m assuming that its working??? With both thermo switch and temp switch unplugged and turning the key to start position but not cranking the gauge still pegs??? Then I plugged both in and no change. Where am I not looking to correct this problem???

#9 NorthWet

NorthWet

    Eeyore Incarnate

  • Members
  • 5,039 posts
  • Bremerton, WA

Posted 03 August 2006 - 07:21 PM

...With both thermo switch and temp switch unplugged and turning the key to start position but not cranking the gauge still pegs??? Then I plugged both in and no change. Where am I not looking to correct this problem???

If it is unplugged and you get a full-scale hot reading, this typically indicates a wiring short to ground. Justys MIGHT have a backwards reading temp-sender, but I haven't heard of that.

#10 RONAN

RONAN

    USMB is life!

  • Members
  • 235 posts
  • Cincinnati

Posted 04 August 2006 - 06:38 AM

Thats what I`m suspecting.

#11 RONAN

RONAN

    USMB is life!

  • Members
  • 235 posts
  • Cincinnati

Posted 09 August 2006 - 01:51 PM

Found a instrument cluster from a U-pull it out of a 89. Everything looks the same. Replaced the temp sending unit and installed the instrument cluster. Turned the key to the start position and same results. So I started removing everything and unbolted the dash again. Looked at all the wiring from where it comes through the firewall out to everything and found nothing out of place or smoked. the grounds were tight. While everything was just hanging loose, I hooked up the cluster and turned the key again. GUESS WHAT??? Temp meter was normal. So I started the vehicle and let it run until the gauge got up to the half way mark and back to my original problem. The fan which is just laying on top of the battery/fender, right now is just blinking on and off. So I started gingerly reinstalling the dash and my temp gauge problem has not came back as of yet but I`m still dealing with the fan issue or problem #1. Anyone out there had this kind of frustrating misery before and a solution???

#12 RONAN

RONAN

    USMB is life!

  • Members
  • 235 posts
  • Cincinnati

Posted 13 August 2006 - 06:14 AM

Got everything back together and checked the fuse to the fan again and found it to be blown this time. I replaced the fuse and drove the car for a couple of miles and then I lifted the hood and found that the fan was working like norm. I let it sit there and idle while the fan cycled on and off like normal and the temp gauge never rose above the 1/3 mark. GO FIGURE! 10 days of banging my head against the concrete driveway and still have`nt figured out what happened. But the car is up and running again until the next time. :banghead:




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users