Steering Wheel Controls - Page 2

Curiosity · 05-05-2004, 01:07 AM

It works perfectly with my steering wheel controls. TransAm to gamepad, single axis. Very nice setup with the range checking.

leenas · 05-06-2004, 04:27 PM

Im about to work on it but im a little confused as to which pin is 1 3 and 6. Could you take a picture of your plug end so i can see it. I ve looked on this site that you referred to:
http://www.epanorama.net/documents/j..._circuits.html

The joystick plug i bought has numbers on them and they dont seem to correspond they way that site shows it. Any help would be great.

Another a quick question: Pin 1 supplies the 5v and then 3 and 6 change the volt according to the resistors in the remote, right? So nowhere in there is a supplied ground?

god_of_cpu · 05-06-2004, 07:06 PM

Sorry, but I won't be able to take any good pictures since the thing is already installed.

Heres the joystick layout from that page
9 10 11 12 13 14 15
o o o o o o o

o o o o o o o o
1 2 3 4 5 6 7 8

-----------------------------------------------------------
1 : +5vDC 1
3 : Stick 1 X-position 3
6 : Stick 1 Y-position 6
8 : +5vDC 8

This shows the two rows of pins at the end of your joystick cable, one row has 8 pins on it. This is the row where you will find the 3 pins you need. The row starts with pin1 and ends with pin 8. Pin 1 supplys 5v power and so does Pin 8. This means they can be used interchangably. So for power, just connect to a pin at either the end of the longer row. 2 pins over from either end is either pin 6 or pin 3 depending on which side you start at. You need to use both these pins as they are axis pins. It shouldn't matter which axis you use for which function so you can also use these pins interchangably. So just connect your axis lines to the pins 2 pins over from the end.

The ground is in the gameport of the computer. The wires 3 and 6 supply the ground as well as serve as the line that the data is read off of. So when you have your circuit all connected, power will flow from pin 1 (5v power) through the resistors in your circuit then to either pin 3 or 6 back into the gameport where they are connected to the analog to digital converter and the ground. Pin 3 and 6 do NOT change the voltage. The resistors / circuit that they are connected to change the voltage (or more correctly, the current) pin 3 and 6 simply serve as the line that connects the other end of the resistor(s) to the ground / ADC.

leenas · 05-06-2004, 07:19 PM

Sorry to be asking so many questions and thanks for the great explanation above (i understand now). Im thinking since nissan and infiniti are the same company im assuming the way the remote works are the same. I removed my remote today and i noticed that two of the wires seem to be grounded but one of the grounded wires was also crimped to another wire that i think goes back to the head unit. The third wire was not grounded to anythingand looks to head back to the head unit.

I understand the reverse polarity of it all and i think that i would connect pin 1 of the joystick port to each of the grounded wires with the diode and the resistor inline and then each of the two wires goes to either pin 3 or 6. What im not sure is what i do with that third wire coming out of the remote that goes straight to the head unit and is not grounded at all.

When you pulled yours out was it similar to what im explaining? If not then ill just test it myself.

god_of_cpu · 05-07-2004, 01:04 AM

I never saw how the steering wheel controls were wired on the steering wheel end. I had the service manual so I knew exactly what the wires did according to it, it even told the resitance that should be expected with each button press. I tapped into my wires where they went into the head unit so the only thing I had to remove was the head unit. There were three wires coming from it. A ground, a line called remote control A, and Remote control B.

If your not sure what the wires do, hook up a multimeter to the ground and the wire that you think leads to the resistors on your steering wheel controls. Turn on the car, put the multimeter to measure resistance, and see if the resistance changes when you press the button. If it works, you know you have the right wires, if it doesn't you either have it mixed up some how or your steering wheel controls work differently.

leenas · 05-07-2004, 01:30 AM

I got my service manual today. What section did you find the diagram for the output currents that you have posted on your G35 thread?

Did your wiring diagram look something along the lines of the attachment, especially wires 27, 26, and 29?

god_of_cpu · 05-07-2004, 01:10 PM

All the digrams I used were in the AUDIO VISUAL, NAVIGATION & TELEPHONE SYSTEM section. I attached them below.

Looks similar enough... On your diagram it looks like youll just have to connect line 29 to 5v from the gameport, and lines 27 and 26 to the axis lines. After you do that just throw in any old resistor between 10 and 1000 ohms onto your axis lines with the diodes, I think I ended up using 270 ohms, then connect it to your gameport and create a 2 axis joystick in the XP control panel. After you have the joystick created goto properties for it, then click the settings tab, click calibrate follow the wizard along until you get to the axis calibration page. Click the display raw data check box and start pressing your steering wheel buttons, you should get different axis values when you do. You'll know you used the right resistor when the value when no buttons are pressed is not much greater then the values when a button is pressed. i.e. 20, 25, 30, 35 would be good values for three buttons and the no button depressed state where 20, 25, 30, 100 would mean the resistor your using is probably too big.

Robyn · 05-08-2004, 11:53 AM

I would suggest connecting it the serial port and using COM-PORT control winamp plugin (works even without winamp) the plugin supports up to 15 buttons. all you need are a few diodes...

EBJUSTIN · 05-08-2004, 12:06 PM

Will this program work with Win98?

god_of_cpu · 05-08-2004, 01:35 PM

Quote: Originally Posted by Robyn

I would suggest connecting it the serial port and using COM-PORT control winamp plugin (works even without winamp) the plugin supports up to 15 buttons. all you need are a few diodes...

You can't use the serial port. The signal is not digital (discrete voltage on, voltage off). Rather it is a variation in current that needs an analog to digital converter that is found in the joystick port. The only way you could use the serial port is if you first had a analog to digital converter circuit which would be far harder and more expensive to implement then just using the joystick port.

god_of_cpu · 05-08-2004, 01:36 PM

Quote: Originally Posted by EBJUSTIN

Will this program work with Win98?

Theres no reason why it shouldn't, but I havent tested it in Win98.

CrzyOne01 · 05-08-2004, 02:04 PM

Wow that sounds great, and is exactly the type of thing Iam looking to do in my car whe n Ifinally get off my *** and build the housing for my LCD(2004 Mazda 3). I do have a question in regards to "will this work or not" type of thing, Irealize Ineed to do some testing on this to check if that is how the steering wheel controls work in my car. My question is how do I test this, just hook a multi-meter up to the control wires and press them to see if there is spiking voltage ?? Also Inoted that you are using a 6 ft. cord, I take it your pc is near the front of the vehicle, if the controls are setup like this in my car would extending the joystick cable to say 15 ft. be an issue or would the line degradation cause some problems. Sorry for so many questions but I just read this post as I was about to go out and disassemble my controls to see if I could modify them in some way

.

- Phil

god_of_cpu · 05-08-2004, 02:53 PM

CrazyOne01,

I am using something closer to 15 ft then to 6 ft. If I said 6 ft previously, I was lying

.

Check the previous posts in this thread for how to test the thing. You want to look for resistance since it is the easiest to test for. Look at the diagram I posted eariler from the service manual of my car. It shows how to test the resistance of the steering wheel controls. You will need to do something similar.

According to the PAC SWI-X document, you should just need to use 1 joystick axis and connect it to the (Gray/Black) wire from your stereo and connect +5v to the (White/Green) wire. You will also need to fake the other axis so it can be detected by windows (You can't have a 1 axis joystick). To do this just connect the +5v line to the second axis line like shown here.

lor · 05-17-2004, 04:40 PM

Hello, and excused for my English.
Unfortunately I do not succeed to make to work Steering Wheel Controls. Making the calibration of the joystick I have already of the problems, in fact pressing the keys not no change different range.
I enclose the table of the volts on Pin 3 and 6, in order it makes to understand me better.
Have tried to vary the resistance from 500 ohms with from 250, 350 and 1000 but it does not work.
I try information in order to resolve the problem.

Thanks.

Lorenzo
Italy

Curiosity · 05-18-2004, 10:07 AM

What's with the "Power" on the left? It already has +5V on it, so if you disconnected that it seems like it would work better. I'm assuming it's +12V from the car?

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