SP206 Pinout info, please

[GreenBravada]

SP206 pinout info, please

I found an ORANGE wire cut on SP206.
Located under passenger side rear seat.
Found a partial pinout for CDF, but nothing for AB. (below)
Note that I have no Light Green wire in this splice block

SP206

Dark Blue/White F (No E wire)
Tan D
Brown C
Light Blue B
Orange (cut) A

I'm guessing that the orange wire was part of the data stream from the OnStar module because it has been disabled by previous owner.





Dark Blue/White F (No E wire)
Tan D
Brown C
Light Blue B
Orange (cut) A


SP206

 

[Mooseman]

Found in my manuals. The manuals on Charm were useless for this specific item.

The link to my manuals is in my signature.

 

[GreenBravada]

I've downloaded EVERTHING you made available, but even when you sent this, it took me a while to find the word SP206. Cataract surgery this summer.
So, the orange wire goes to the OnStar (vehicle communication interface).
All the wires going into that splice block are connected to a single point.
Never quite understood how a data buss works and the signals get sorted, and I was a certified electronics technician, but back in the olden days when microprocessors were new.

 

[Mooseman]

You should see the new stuff like in my '21 Sierra. EVERYTHING is connected to what's called the LIN Bus. High and low lines that are split into nodes with a Serial Data Gateway Module thrown in there for good measure. These old trucks are easy.

 

[TJBaker57]

EVERTHING you made available, but even when you sent this, it took me a while to find the word SP206.

This may be a typo in the diagrams but here is SP 306

Information Bus — 2003 Oldsmobile Bravada 4WD L6-4.2L VIN S Service Manual | Operation CHARM

Detailed repair manual for the 2003 Oldsmobile Bravada 4WD L6-4.2L VIN S.

charm.li

 

[TJBaker57]

Never quite understood how a data buss works and the signals get sorted,

For this serial data bus there is no "sorting" of the signal. Every module receives every message. Each module even listens to its own message pulse as it sends it.

 

[GreenBravada]

This may be a typo in the diagrams but here is SP 306

Information Bus — 2003 Oldsmobile Bravada 4WD L6-4.2L VIN S Service Manual | Operation CHARM

Detailed repair manual for the 2003 Oldsmobile Bravada 4WD L6-4.2L VIN S.

charm.li

Thanks, TJ. That's the one I saw, too. Not the right one!

 

[GreenBravada]

For this serial data bus there is no "sorting" of the signal. Every module receives every message. Each module even listens to its own message pulse as it sends it.

Even in the 80's the world was already creepy. I was installing complex medical x-ray systems starting in 1982. The first microprocessors were coming in, and we had to program them by flipping toggle switches for memory address and data and flip another switch to write it. In tech school, we had to program a microprocessor using machine language. It took many precise commands to get it to light LEDs in a particular order. Actually kind of fun to find the least number of commands. Ancient history. I sound like someone telling about hearing the first radio broadcast.

 

[TJBaker57]

Thanks, TJ. That's the one I saw, too. Not the right one!

The lower sketch in the previous link is the data bus splice pack under the rear seat.

The upper sketch in the previous link shows the splice pack in the lower dash.

Utility/Van Zoning — 2003 Oldsmobile Bravada 4WD L6-4.2L VIN S Service Manual | Operation CHARM

Detailed repair manual for the 2003 Oldsmobile Bravada 4WD L6-4.2L VIN S.

charm.li