Fly by wire gas pedal wiring

[Triathletedave]

I was about to extend the 6 wires on the fly by wire gas pedal connection when I came across something unexpected. One of the wires starts at the plug as an 18 gauge red wire, but is immediately spliced into a larger grey wire. It turns out that the grey wire is a coaxial wire. The outer sheath is silver, and covers but is not connected to the inner 18 gauge red wire.

Do I need to use coaxial wires to extend this? It looks like only the inner 18 gauge wire is actually used at the plug. Is the outer sheath an insulator or meant to isolate the inner wire somehow?

Thanks.

Dave

33807

[Bob_n_Cincy]

Hi Dave,
The grey wire is the shield for the red. The stranded shield should be tied to a ground joint connector near the ECU.
The grey shield has no connection at the pedal.
If it is not long enough, it is ok to run the last few feet to the pedal with no shield.
Bob

[VD2021]

The outer braided portion is shielding. It's designed to reduce electrical noise and/or electromagnetic radiation that could be induced into the inner wire.

The shielding should be applied across your splice, using a shielded wire of the same gauge, insulation size and shielding, in order to provide originally engineered shielding.

[Triathletedave]

Hi Dave,
The grey wire is the shield for the red. The stranded shield should be tied to a ground joint connector near the ECU.
The grey shield has no connection at the pedal.
If it is not long enough, it is ok to run the last few feet to the pedal with no shield.
Bob

Thanks. I only had to extend it by about 12 inches. Lots of hassle for such a short splice.

Regards,

Dave

[michael everson]

can that pedal and throttle body be used as a standalone system?
Mike

[Triathletedave]

Not sure myself. Any experts out there who can answer this?

[Bob_n_Cincy]

can that pedal and throttle body be used as a standalone system?
Mike
No, The signals go through the ECU.
Bob