I've recently been fitting a quick release Momo steering wheel and have had it off more times than i care to mention!!! But if you remove the steering wheel there is a round piece of plastic that the steering wheel holds in place when you turn (which cancels the signal) It's easy to fix but as i found if you don't relocate it correctly the signals get messed up.
FIRSTLY -I'm assuming that you've got a standard factory Supra wheel.
SECONDLY -I don't have a driver airbag and I'm unsure what problems you
may find if you do. Personally i'd just remove the fuse so it won't
activate (i think)!
THIRLDY -Make sure that your front wheels are exaclty straight or you'll
have to refit the wheel a few times to get it looking straight
afterwards. (try going forwards and then reversing in a straight
line a few times).
HERE GOES...
(1) Remove the fuse for the horn in the engine compartment.
(2) Remove the phillips screw at the bottom of the steering wheel
(3) Apply a little pressure to pop off the front of the steering wheel.
there's 3 connecting plugs on a three spoke steering wheel.
(4) Unclip the electrical connector for the horn.
(5) Unscrew the bolt that holds the wheel onto the steering column.
(6) Remove the steering wheel. Behind the wheel there are 4 locating
holes which need alligning with 3 lugs. (mentioned later)
NOTE: Try and be reasonably gentle when pulling the wheel from the
column itself. It's probably been on there a while and I nearly
broke my nose by hitting myself in the face with the wheel.
YES, IT STINGS!
(7) You should now see the offending round piece of white plastic. It
should have 3 lugs on it. One lug on its own and 2 lugs on the
opposite side.
(8) There is also a circular black plastic disc that spins round.
(what the horn connector plugs into.)
(9) Turn the black plastic disc so that the connector is at 12 o'clock.
(10) Next relocate the white circular plastic part so that the single lug is
at 12 o'clock.
(11) That's it. Now reconnect the electrical connector for the horn.
Replace the steering wheel (ensuring that the white circular plastic
part is still located correctly.
Tighten up the steering column bolt
Fasten on the front cover of the wheel.
Don't forget the phillips screw
Replace the horn fuse.
NOTE: I didn't use a torque wrench when tightening up the steering
column bolt but found that if you do it up too tightly then the
horn will sound as you turn the wheel as you're damaging the
black circular disc by squashing it too hard. I found that just a
little more than finger tight seems to be ok. Well, I haven't
crashed as my wheel hasn't fallen off! - YET!
Hope that helps. p.s. if anyone out there has an M plate '95 import (SZ-R) and have moded thier steering wheel, where did they get their steering hub from? Got mine from motorspeed.com but the hub they supplied me with is clearly not specific to this model even though they say it is. As it don't fit propper!?