ACC unavailable, can I get the wiring diagram?

Hello, this is the OEM diagram from All Data. I'll post the operations service info as well, just curious, what code is setting? Or are you just getting a message displayed?

Well, the first thing that comes up with that code (U1216) is "Body Control Module -Lost Communication w/ DASM (Driver Assistance System Module)", and "Instrument Cluster- Lost Communication w/ Driver Assistance System module".
This being a hybrid system, it is something that needs to be diagnosed by a technician who is trained and certified for working on electric vehicles. This would be specific EV training, because of the high voltage system, even touching or unplugging certain components can result in serious injury or even worse. Some of these systems run up to 400volts and higher, even to 1000 volts. And that can easily cause very extreme personal injury. We can't recommend any testing that can result in personal injury. U codes are network communications codes, the issue can be anything from software faults to that DASM not communicating on the network for any number of reasons. There may also be other modules setting codes, but that would take a higher end scan tool to do a full health report and scan all the modules throughout the entire vehicle.
This is not just going to be looking for a broken wire, if it's a module needing a software update, that's something a dealership would need to do anyway. It's not worth getting hurt if you're not certified and trained to work on these systems.

Okay, sorry I just dont want to see you accidently get injured, but an update on what the fault is would be good. I have started taking some EV courses, and its not that the high voltage electrical section of the vehicle is overly confusing, it actually has less components than a conventional combustion engine, its more of being safe. Even having tools which have a rubber non conductive coating so if they are dropped accidently, such as a wrench, it wont short out anything and cause a fire.
But I do hope they find something simple to repair. At 50k miles, I would think its still under warranty?

Those voltage readings are all within range, on pins 3, 4 CAN C Private Bus +/- and pins 7, 8 CAN C +/- you will only get a very rough average of the CAN bus voltages using a multimeter, a meter is not nearly fast enough to measure CAN bus data.
To see if there were good data packets coming from the module you would need to scope those wires with the connector unplugged but the module still powered up.
You verified the module has power and ground.
The voltage you're reading on the CAN bus wires could be from any module on that specific network, not necessarily from that module you're testing at.

There is a bulletin on the XY101A connector, but service info has you remove the battery, air intake system, and battery tray for the repair, due to water intrusion at that connector,

but for the record, I don't recommend going and looking for the connector or disconnecting any electrical connectors or systems on this vehicle. And Do Not touch any bright orange wiring or connectors, those are the High Voltage wiring,
This bulletin has specific instructions for a dealership to reseal this connector and it looks like a grounding location as well. But you're not getting any of the codes for this TSB anyway, below is a section of it.

This is the location of the XY101A connector that has a TSB for water intrusion. Just don't disconnect even the 12volt battery because there are certain procedures for battery disconnects nowadays, so I don't know if you'll even be able to see this connector, but this is most likely going to be the problem area, the marker lamps run through that connector as well, just always be aware of any Orange wire conduit. You may be able to see the connector from underneath. It's a 14 wire connector.

I'm not sure it might be, you will have to identify it by the wire colors and their positions in the connector. Let me take a look at the connector pinout, it looks like they made a mistake it their labeling of it, that happens with aftermarket wiring diagrams sometimes. They have 14 wires labelled, but I count 16 pins, and the pin labelled J is not actually used, but you should count 14 wires in that connector to begin with.

Honestly, I have no idea how they have this connector configured. This is all I can make out of it, I know that H is definitely Ground. You can see in the 3rd diagram, pin H for connector XY101A is circuit "Z917" and is a black wire.

Also, the BG is beige, which is the first time I've ever seen that color labelled like that. But they are missing some info on this connector, stating it's a 14 cavities, but 16 pin openings.

The shop was not able to repair that issue? Do you mean the right side front and rear marker lamps?

Do you remember which side radar they replaced? It's possible they had to take some stuff apart to replace the radar unit and forgot to plug some connectors back in, or they damaged some wiring during the "repair". It's so frustrating to hear a vehicle go in for repairs and come out with more issues than it went in with. I hear this a lot. And usually recommend it go back to the shop since it's a fault they probably caused.

Okay, do you have enough wiring diagrams?