Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 23

Thread: Lexus climate control screen help

  1. #11
    Variable Bitrate skippy911's Avatar
    Join Date
    Feb 2005
    Posts
    440

  2. #12
    Fusion Brain Creator 2k1Toaster's Avatar
    Join Date
    Mar 2006
    Location
    Colorado, but Canadian!
    Posts
    10,053
    In "IMG 0436.jpg" There is an LCD data pin. Maybe if you have a friend at Toyota/Lexus, they can provide you with the proprietary connector for that to some universal standard. Longshot, but why else would there be a cable connector with LCD data being a label?

  3. #13
    Variable Bitrate skippy911's Avatar
    Join Date
    Feb 2005
    Posts
    440
    Not sure but maybe it means its going to the lcd already in the car. I dont have any pals at toyota unfortunatly.

  4. #14
    Fusion Brain Creator 2k1Toaster's Avatar
    Join Date
    Mar 2006
    Location
    Colorado, but Canadian!
    Posts
    10,053
    If you have any way of collecting serial data hook it up carefully. If it is an output, then you'll see something you might be able to decode, and if you see nothing, then I guess it could be an input, but I don't think it has any memory in there. I have an rx300 too and it is just the character display with lighted LED segments so pretty simple. Can't be that much coding going into that thing. My guess is that each part (radio, climate, and the trip display, ect) each have a dedicated bunch of wires that accepts some really simple binary that you could simulate and/or capture.
    Like for instance, the trip part. You switch between a-mpg and a-mph and others but it just tells a different part to light up, not a bunch of pixels. So its probably like 3bits saying which one to turn on.
    This is all a guess by the way...
    If you have a spare one or can find one on eBay, maybe you should get it and then start playing around with it a little more aggressivly like pumping in info to tht port and see what happens then refine. Or maybe Lexus will ive you that info if you pretend to be a certified tech???
    good luck.

  5. #15
    Variable Bitrate skippy911's Avatar
    Join Date
    Feb 2005
    Posts
    440

  6. #16
    Fusion Brain Creator 2k1Toaster's Avatar
    Join Date
    Mar 2006
    Location
    Colorado, but Canadian!
    Posts
    10,053
    So if I read correctly, you could either leave the LCD intact and hide it somewhere (So you can replace later) or just sever the connections alltogether and read the data. I think you should keep the screen because it seems to help synchronizing. I would tap into pins 1-32 and 35-62 and find out where they go. From there you could wire some simple logic to decode the info and then encode it to serial data and then send through a serial port into some software.
    On a completely different note, do you think that there is some connector hidden deep within the rx300 that allows for a Lexus technician to hook up and see everything? That would definately uncomplicate things. Might be worth checking into. Again a Toyota/Lexus friend would help, but as far as I can tell, Lexus dealers are prety nice (at least around here).

  7. #17
    Variable Bitrate skippy911's Avatar
    Join Date
    Feb 2005
    Posts
    440
    Ill have to look into that connector thing I know there are tons of them in the suv that I have no idea what they do ie nothing hooked into them.

    EDIT: BTW I plan to hide the lcd somewhere I am definetly not going to sever the connections to it, I would just like to display the data in RR or frodo instead of on the lcd, since my 7" t/s is going in its place

  8. #18
    My Village Called 0l33l's Avatar
    Join Date
    Jul 2004
    Location
    Berkeley, CA
    Posts
    10,516
    Quote Originally Posted by 2k1Toaster
    I would tap into pins 1-32 and 35-62 and find out where they go. From there you could wire some simple logic to decode the info and then encode it to serial data and then send through a serial port into some software.
    Ehhh..... what would you tap into those pins with? Wouldn't it be easier to hook up to the TX pins, or the pins going into those chips

  9. #19
    Fusion Brain Creator 2k1Toaster's Avatar
    Join Date
    Mar 2006
    Location
    Colorado, but Canadian!
    Posts
    10,053
    Well then you would need to know how they are encoded I guess. The advantage of doing it your way would be less wires, but complexity of decoder. It can work both ways, but the 1-32 and 35-62 have already been parallelled and are not in series anymore.

  10. #20
    My Village Called 0l33l's Avatar
    Join Date
    Jul 2004
    Location
    Berkeley, CA
    Posts
    10,516
    Quote Originally Posted by 2k1Toaster
    Well then you would need to know how they are encoded I guess. The advantage of doing it your way would be less wires, but complexity of decoder. It can work both ways, but the 1-32 and 35-62 have already been parallelled and are not in series anymore.
    I guess. But then you would have to have a chip that takes the paralleled lines and converts them into something the computer can understand. So basically you'd end up doing an extra conversion for no reason.

    What I would do first is check out these connections using a serial port + hyperterminal.

Page 2 of 3 FirstFirst 123 LastLast

Similar Threads

  1. Lexus IS200 Lexputer!! Flip Up Screen!
    By Anees in forum Show off your project
    Replies: 27
    Last Post: 03-06-2007, 02:45 AM
  2. Help with Climate Control.....
    By map_auto in forum General Hardware Discussion
    Replies: 1
    Last Post: 06-07-2006, 05:07 AM
  3. climate control through pc
    By gotdubd in forum Newbie
    Replies: 5
    Last Post: 02-05-2006, 09:48 PM
  4. climate control
    By john_draws in forum General Hardware Discussion
    Replies: 5
    Last Post: 06-27-2004, 10:31 PM
  5. Gamecube screen
    By junior in forum LCD/Display
    Replies: 7
    Last Post: 11-24-2003, 06:38 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •