1uz auto issue

[jonossiksilvia]

i am still having issues with the auto box
been studying diagrams for ages and google wont bring up anything with the problem i have:

quick drive down the street resulted in auto changing gears - awesome but putting the gear stick from d to L doesnt hold 1st gear - its just like its in drive. - i thought the 1uz auto was controlled in the engine ecu and would get the signal of the nsw on side on box to stay in first if the lever was in L. really need this to work properly out on the tracks.

also maybe related but there is only a 5500rpm or so limit in 1st gear before it changes gear.


specs:
92 1uz auto box using 1uz loom and 4 prong sensor etc


So I have checked the following:

Shifter adjustment is correct
Auto cable connected to the throttle is set correct
Fuild level correct
ecu getting speed from cluster
12volt power going to the solinods
Unplugging the connector that feeds solinods makes it stay in first gear until stick is moved
Unplugging the same plug also stops reverse cutting in and out nonstop on light throttle
I do not have the internal diagnosis plug so cant check auto codes and have been tiring to track down the plug
Engine light is not on nor showing any codes either

Just spent the whole day going over everything

Bummer I cant find anyone in chch to send it to - they only wanna know me if get an aftermarket ecu

if anyone can post up a link or point me somewhere that would be great

cheers john

[kbushnz]

Do you have a manual for the A340 series auto?
In it is a table which shows what happens when a solenoid fails or is not getting a signal. This may be your problem...
Alot of guys manulise the auto like I have just done....(mines behind a 1KZTE)
Works great off road....(
Otherwise there are aftermarket controllers...
SupraStick is a good one...

Yes the auto is ECU controlled and there is a signal wire from the NSW to the ECU to indicate L and 2.....Your NSW could be out of whack....

Have a read thru this post..
http://www.offroadexpress.co.nz/Forums/ ... 340+manual

[jonossiksilvia]

hi.

any chance you could pm or post up here the manual?

yep had a read through your link as you were doing it.

before going to a manual setup or using an a/m controller i want to get it working like factory first (ease of use when i feel lazy or the mrs gotta drive it)

the nsw is getting pulled next weekend and am going to test its working properly.

cheers john

[kbushnz]

Goto http://www.autoshop101.com/
Look thru the Tech article section.
It has all the basic info re Toyota Auto's

I will hunt out a link to the A340 auto manuals unless someone else beats me to it....

[wjw]

http://home.wjw.co.nz/Toyota/A340/autotrans.html

or have a look at the A340 2JZ ones:

http://home.wjw.co.nz/?p=152

Other option is to run a Jeep Cherokee Auto ecu that was what I used in the prado with the 2JZ as we couldnt get it to shift right with the factory 2ZJ or 1KZ ecu's

[jonossiksilvia]

cheers guys will have a look at both your links

[wjw]

I just read the link I sent

L in an A340E should be 1st & 2nd gears. Not just 1st

Look on 2nd page here:

http://home.wjw.co.nz/Toyota/A340/19manualsh.pdf

[jonossiksilvia]

i might be missing something here but pretty sure the box is a A341e

[wjw]

might be....

A341E (30-41LE)
Applications:
1990-2000 Toyota Chaser/Mark II/Cresta 2.5 GT/Tourer V (1JZ-GTE)
1991-1997 Toyota Soarer 4.0L V8
1993-1995 Lexus GS 300 3.0L
1992-1999 Lexus SC 400 GT-L V8 cdn spec.
1990-1994 Lexus LS 400 4.0L V8
1990-1995 Toyota Crown Majesta 4.0L V8
1992-1998 Volvo 2.9L I6 (AW30-40LE)
1st Gear 2.531 2nd Gear 1.531 3rd Gear 1.000 O/D Gear 0.705 Reverse Gear 1.880 Final 3.916

What was it out of?

[jonossiksilvia]

1990-1994 Lexus LS 400 4.0L V8

has toyota badge on engine car was a celsior

do you have a341e manual? have looked at ur links yet

cheers john

[wjw]

got 340 and 343

[wjw]

found a manual, not nicely presented but its all there:

http://staticfrost.com/manual/90-94%20UCF11%20Manuals/Automatic%20Transmission%20(AT)/

[jonossiksilvia]

perfect will slowly work through the trouble shooting now

cheers lots bill