Steering Wheel Controls
The steering wheel
controls are momentary switches connected to pins P and
N of the harness. They short these pins with various
levels of resistance which is decoded into the various
functions. I took apart my MPV's head unit and read the
resistance on the functions it has. I then tried this
control with my Miata's 4H60 head and the controls all
worked perfectly. So this might presumably work with all
FMS double-DIN heads!
Application
|
Resistance
|
Mode |
1k Ohms
|
Vol+ |
150 Ohms
|
Vol- |
60 Ohms
|
Track |
300 Ohms
|
Mute |
2k Ohms
|
Mazda Millenia