
patcal
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Everything posted by patcal
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Well. I got another TCU today. It is not the right part number but it is out of a 93 Legacy AWD model sedan. It has a big EE on it instead of the GJ mine has. So far, no more binding & no TCU code 24. Seems to drive & shift fine. Any ideas if the different TCU could hurt anything? It was $20 so I figured I can't go wrong plus it seems to have proved that the old TCU was bad. Any thoughts?
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AC-134 retrofit
patcal replied to patcal's topic in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX
Thanks. Found it after I posted. -
Hi all, While I try to find a used TCU I thought I would look at my AC system. It is low on charge & the compressor kicks on & off. I am assuming because of the low charge. I am thinking that in the long run it will be cheaper to convert it to R-134 then to just have it leak checked & charged with R-12. I think I saw retrofit kits of the Subaru somewhere. Any idea if there is a specific one needs & how much do they cost? Also, is this something a home mechanic can do? Thanks.
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Hi all, OK, here is what I found up to now. There is never any binding when I have a 12v source going to the solenoid. Never skipped a beat. What I did find this morning is that my voltage that the TCU outputs is not correct. With the fuse out & the car in "1" gear & the pedal floored there should be less then .5V. I have 4-7V. I have also checked all the TCU ground for resistance at the body & there is no bad ground. All read 0 ohms. There are four different grounds. What this seems to be telling me is the harness to the solenoid & the solenoid & the clutch packs are fine. I think either the TCU is bad or one of it's inputs. If it was one of the inputs I should get a code on the ECU but I am not. Just the TCU code 24. Does all this make sense? Am I missing something? I think it's the TCU.
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Mike, I just hooked up a 12V that was through the ignition switch. When I had my volt meter hooked up the computer was giving the slenoid 11.65V with the fuse in. This just bypasses the TCU & everything that feeds it. If this continues to work what I need to do is start checking components & grounds from the TCU & sensors. Code 24 is the duty solenoid c. Even with the solenoid wired the way I have it, the TCU poped the code after I cleared it. Pat
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Ok, here is what I have done. I cut the wire going from the TCU to the duty soenoid c. (#3 connector b33) I hooked up a switched 12v source to the wire going down to the solenoid. With that configuration, there is no binding whatsoever. There is still a code 24 in the computer but I am going to clear it. It turns out the service advisor was not even sure if his tech hooked up the TCU diagnostic. I think all he did was drive it. Any more ideas? Thanks.
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Well, the dealer says the problem is in the tranny. They want about $2600 for another one. They said everything electrical checked out so it has to be in the tranny. They also said that I could replace the clutch pack but it may not solve the problem. I am going to give myself a couple of days to cool off but I think this car has got to go. Thanks for all the help & suggestions you all made. I do appretiate it.
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I want to thank all you guys for the help trying to suss out my torque bind issue. You guys have been real patient with me. Tomorrow I take the car to Gresham Subaru to have the TCU checked out. If they tell me what's wrong I can probably fix it. I hope it's worth the 1/2-1 hour labor he tells me it should take. I'll let you all know tomorrow evening what I find out. Thanks again.
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Josh, Only when the voltage drops to 0V. Example this morning all the way to work, 11.65V with no torque bind. Yesterday I was just driving my wife to church & the voltage dropped. As I pulled over I got the torque bind. I shut off & re-started the car & again, 11.6V & no torque bind the rest of the day. I have parts of the wire diagram. The thing that bugs me is that I still have a code 24. Whatever is the problem, would not this most likely be in the duty solenoid c circuit?
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Ok, here is what I have done. I wired my volt meter positive to #3 (duty soenoid 3) at the TCU & negative to #10 (ground) at the TCU. Here is what I have found. With the fuse out, I start the car & the voltage is about 6volts. By time I get to the corner, the voltage has dropped to .003volts. Essentially 0V. I am getting a lot of torque bind while all this is going on. If I put the fuse in, I get about 11-12volts at startup & it settles doen to 11.6volts as I drive. At this point I get no torque bind. All of a sudden shile I am driving the volts will just drop to .003v. When that happens the bad torque bind comes back. What is going on? Thanks.
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They showed me the brokem mounts but I have not had a chance to get under the car & check. I am going to drive it for a while with the fuse in. Since I have only had it a short time I want to make sure I like the car before I put anymore money into it. It seems to drive & shift fine with the fuse in. I will most likely put in a switch so if I need the AWD I will have it.