Steering wheel audio contorols - Yaris 2003

[BXN]

Thx for info. Happily my Yaris is from 2003 (as in topic of this thread).

Noob question - what is the purpose/function of the spiral cable (haven't took out steering wheel yet to look at it)? I'm an engineer, not car mechanic...

[CTScott]

Originally Posted by BXN

Thx for info. Happily my Yaris is from 2003 (as in topic of this thread).

Noob question - what is the purpose/function of the spiral cable (haven't took out steering wheel yet to look at it)? I'm an engineer, not car mechanic...

The spiral cable creates a flexible connection between the steering column and the devices on the rotating steering wheel (airbag, audio controls, cruise controls, etc). It is a coiled ribbon cable with a mechanism to allow it to coil and uncoil some number of rotations in either direction.

I just noticed what you mean with the 2003 airbag cover. It appears that the audio controls were mounted to the steering wheel itself as opposed to on top. In the EPC it shows different steering wheel assemblies for audio/no audio and just a single part number for the airbag assembly.