Reset TCU?

91White-T · Post by **91White-T** » Sat May 17, 2003 12:13 am

How can I reset the TCU? I'm hoping that maybe my 4WD has an electrical and not a mechanical failure...

ciper · Post by **ciper** » Sat May 17, 2003 1:57 am

Unplug it? Never thought it would remember stuff but you never know! Its easy to do, just right next to the stearing column. Two 10mm nuts hold down.

Post by **Legacy777** » Sat May 17, 2003 3:13 am

pull fuse 16 (EGI/TCU) under the dash.

Leave it out for 10 min. That will reset ECU & TCU.

91White-T · Post by **91White-T** » Sat May 17, 2003 11:48 pm

Is there a TCU pinout sheet anywhere? I'm gonna try cutting the duty sol. C wire.

91White-T · Post by **91White-T** » Mon May 19, 2003 9:08 pm

I'm guessing no one has a TCU pinout???

Post by **Legacy777** » Mon May 19, 2003 11:59 pm

http://www.main.experiencetherave.com:8 ... _page1.jpg
http://www.main.experiencetherave.com:8 ... _page2.jpg

91White-T · Post by **91White-T** » Tue May 20, 2003 12:12 am

Awesome, thanks a lot

91White-T · Post by **91White-T** » Tue May 20, 2003 3:45 am

Ok, I cut the wire and drove around a little, raced a riced out Civic, and so far I got nothing more than some strange noise and shaking when I go around slow corners...

ciper · Post by **ciper** » Tue May 20, 2003 4:36 am

Meaning its not an electrical problem right?

gt tankie · Post by **gt tankie** » Tue May 20, 2003 11:17 am

mines got no awd at the mo.
Cutting the wire to duty solenoid c makes the drive 50/50 so it's locked up full time. Only prob is u now have binding in ur drive line especially going round corners. Reconnect it otherwise things are going to get flogged out pretty quick. U will still have that aggressive awd when u race, the tcu senses slipping between front and rear axles and controls the transfer clutch accordingly.
Why did u cut it in the first place?

Post by **Legacy777** » Tue May 20, 2003 2:30 pm

91White-T wrote:Ok, I cut the wire and drove around a little, raced a riced out Civic, and so far I got nothing more than some strange noise and shaking when I go around slow corners...

that shaking/noise is from the binding of the AWD system. It's not meant to be run 50/50 all the time. In slippery conditions it would be beneficial.

91White-T · Post by **91White-T** » Tue May 20, 2003 3:10 pm

If the noise if from the AWD system working, then why the $%$#^ does it STILL spin the front wheels. I'm all out of ideas on this one...

Post by **Legacy777** » Tue May 20, 2003 6:13 pm

sounds like there is a mechanical based problem somewhere in the tranny/rear extension housing.

herr_diesel · Post by **herr_diesel** » Fri May 23, 2003 2:40 pm

wait a minute, cutting the duty C wire trips it into 50/50 split? this is what i have been wanting to do for a while now! i wanna throw a toggle (or tie into that useless manual switch) and give me full awd on demand.

any idea if this will reek havoc on the tcu?

dude, time to sell the subie and buy an amc eagle...the true measuring stick by which all sport utility cars should be compared.

no tranny fluid leaks? i know that between the trans and rear housing, part of the case can get wallowed out, but that usually diminshes awd action, rather than causing it to increase. but at any rate, i agree with 777, something ain't right in that rear housing.

good luck.

91White-T · Post by **91White-T** » Fri May 23, 2003 2:47 pm

The car's at the dealer right now, so hopefully I'm gonna find out exactly what the hell's goin on. As for that wire cutting thing, I wouldn't recommend it... It made some really ugly sounds and shakes during low speed turns.

92Turboleg · Post by **92Turboleg** » Wed Oct 01, 2003 1:45 am

back from the dead but . what was the prob. my car is locking up and will not move i pulled code 24 out of it duty s. c and was wonderin if this was your prob. also?

jkb · Post by **jkb** » Thu Oct 02, 2003 8:06 am

It would be great help, if anyone of you have pinout sheet.
So far clutch and TCU is replaced(used TCU), c soledoid was mesured and it should be ok, but still my Legacy is 2WD

Before I change solenoid, I would like to manually switch solenoid on/off and measure tcu, to see if solenoid is the problem.

Thanks for the help.
If you can e-mail it to me, it's: jkb@mbnet.fi

Post by **Legacy777** » Thu Oct 02, 2003 1:43 pm

http://www.main.experiencetherave.com:8 ... _page1.jpg
http://www.main.experiencetherave.com:8 ... _page2.jpg

jkb · Post by **jkb** » Thu Oct 02, 2003 2:41 pm

Legacy777 wrote:http://www.main.experiencetherave.com:8 ... _page1.jpg
http://www.main.experiencetherave.com:8 ... _page2.jpg

Page cannot be displayed

jkb · Post by **jkb** » Thu Oct 02, 2003 6:18 pm

Now it works.
Thanks a lot

Post by **Legacy777** » Thu Oct 02, 2003 7:12 pm

page better work......or I'll have to smack my isp around....

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Reset TCU?

Reset TCU?