Bdub215

iTrader: (1)

I just picked up a 92 SC300 5 speed with 104K on the clock. One owner car. So far i've noticed the Power Mirrors arent working, The Power Trunk realease isnt working, Memory seating also isnt working. The Key way to lock the trunk inside the car appears to be stuck but im not 100% sure. TB/WP dont appear to have been done but other then that is car is pretty clean. I can handle the mechanical bits. This is (personally) my first SC, My family's Second (still have the other) and our 4th lexus product.

I Just need some advice on the Electrical bits and i'll be posting in this section alot more now lol. Already trying to figure how to fix a Code 71 on my Dad's SC.
couple photos..

mikef

iTrader: (3)

this car has a ECU for almost everything, and its a good thing, find your mirror ecu and open it up or replace it
the other problems, you just have to start open things up with a multimeter in hand

iridebmx

iTrader: (6)

doesn't sound like a ecu problem. more like a fuse is blown problem

Bdub215

iTrader: (1)

Checked every fuse on the mirror circut (Radio No2 and ECU-B because thats what i thought) I will check them again. i dont really mind the memory seats so much but i need the mirrors to work for PA inspection when that time comes.

EDIT: Fuses Check out.

eknine9

iTrader: (8)

Are your trunk lift supports still working?
When they go out the interior trunk release button will have trouble popping your trunk open, but you should still be able to open the trunk with the key from outside the car. I'd check and replace that first before trying to chase down any electrical or mechanical gremlins. If the trunk lift supports are operational then I guess you'd start chasing down the problem elsewhere, but figured I'd offer a possible simple solution thats easy to check before u start looking.

scENFORCER

I was going to say fuses too. Did you check the fuse box hidden under the kick panel too?

Bdub215

iTrader: (1)

Lift supports are ok. I did check the inside kick panel.

Biddles

iTrader: (2)

When I got my car someone redid the speakers in the door and forgot to connect the memory seating wiring back in, check that by removing the door panel. The mirror ecu can be a pain in the *** though...

Slaker13

For the power trunk release is the the valet button pushed in or out? the silver circle with key hole between the gas switch and trunk on the lower left side of steering wheel, mine was pushed in and kept my power trunk switch from working.

SC400slide

iTrader: (11)

As to the power trunk release, the valet is probably locked. If you dont obtain the key, open it up, remove a metal cylinder covering the lock assembly, and press the black button and walla its unlocked. For this DIY search "replacement nubs for center armrest Lexus" and it will pop up gl

1JZPWRD

iTrader: (59)

I think the mirror issue is the ECU, which is a pain to get too, if all the fuses are good. I do know the clock and the mirror are tied together, along with the door locks, if I am not mistaking. See if the door locks and clock works, if so, then check that darn mirror ecu. Now that I am thinking about it, I think the trunk release is also tied in to the same circuit. Check the fuses in the engine bay. I believe it is a 10 amp fuse.

Bdub215

iTrader: (1)

Its looks like its stuck half way in. None of my keys make it move an inch.

I've got two master keys (with the button) and one spare (without the button) and none make that lock cylinder do anything. I'm gonna go look at that thread and see what i can do.
Locks work fine, Clock works fine. i'm gonna disassemble the lower dash and report back on what happens.

Bdub215

iTrader: (1)

Power trunk works! Lock is frozen or broken. It doesn't turn. Now the mirrors ...