Steering Wheel Audio Control Question

[YarisGLS]

Would anyone be so kind to tell me how the 5 buttons on the toyota steering wheel controls are wired? The buttons of "Mode/vol+/vol-/Seek+/Seek-".

http://toyotaownersclub.com/forums/index.php?showtopic=76657

I know that the five buttons are connected to the factory stereo via three wires. I have a feeling that the schematic may look like this:

The resistor's value is what I am after. If you happens to have the steering wheel beside you, could you be so kind to measure the resistance of each button when they are pressed (and when they are not pressed, in case there is a particular resistance in the steady state)?

1. Measure between 6 and 7, pressing vol+/vol-/seek+/seek- and write down the 4 resistance value

2. Measure between 6 and 8, pressing "mode" and write down the resistance value.

Many Thanks in advance!

P.S. I do not have steering wheel controls on my car, hence I couldn't find out these values myself.

[Mikiglesias]

Would anyone be so kind to tell me how the 5 buttons on the toyota steering wheel controls are wired? The buttons of "Mode/vol+/vol-/Seek+/Seek-".

http://toyotaownersclub.com/forums/index.php?showtopic=76657

I know that the five buttons are connected to the factory stereo via three wires. I have a feeling that the schematic may look like this:

The resistor's value is what I am after. If you happens to have the steering wheel beside you, could you be so kind to measure the resistance of each button when they are pressed (and when they are not pressed, in case there is a particular resistance in the steady state)?

1. Measure between 6 and 7, pressing vol+/vol-/seek+/seek- and write down the 4 resistance value

2. Measure between 6 and 8, pressing "mode" and write down the resistance value.

Many Thanks in advance!

P.S. I do not have steering wheel controls on my car, hence I couldn't find out these values myself.

Did you finally solve it?

i am trying to do something like it in a Verso....and maybe I could help you...