Looking for 2012 5.3 liter E38 Connector Pin Out

[dave w]

Thank you!

I was able to get some Alldata schematics at my local library, but I could not find the connector pin outs.

dave w

The attached .pdf has the Alldata schematics I printed from my local library.

dave w

[brian617]

You get the info you needed Dave? Have ShopKey/Mitchell here if you still need.

[dave w]

You get the info you needed Dave? Have ShopKey/Mitchell here if you still need.

I think I'm doing OK. This weekend is when I get my hands dirty with the actual wiring. So far the wire colors and pin outs match the harness. I seem to favor the Mitchell Manual diagrams (before 2002 anyway), so it would awesome if you could post the Michell ECM diagram.

I'll post up more schematics I got today that should help someone wanting to set up a 2012 harness for stand alone.

dave w

[dave w]

More schematics.

dave w

[brian617]

Dave, I've tried to figure out a way to post those diagrams but it seems if ShopKey is protected from duplicating, or I'm just too stupid to figure it out lol. Sorry.

[dave w]

I'm adding the data Link Schematics. See attached.

I have two questions:

What is the Data Link Resistor?

If a module, like the Body Control Module, is removed from the vehicle ... Is a Data Link Resistor still needed?

dave w

[Buzz]

Not to worry ... in a Hot Rod / custom application the E38 provides this to the CAN Bus network.

As an example, you can bench read an E38 with tuning software, without issue.

Try connecting to just a TCM (T42 / T43 / T76) without an ECM on the CAN Bus network - doesn't seem to work, does it ?

Now, bridge the CAN Bus lines with a 120 ohm resistor, and try reading the TCM on its own again - son of gun, the tuning software will now read the TCM.

The CAN Bus communications protocol requires 120 ohms resistance (a.k.a. - Data Link Resistor).