2013 Jaguar XF 3.0SC AWD

This is involving a bit of detective work and so far the perpetrator is undetermined at this time. Here are the symptons:
1. Message appears on the info system screen "Camera system is unavailable. - see dealer" followed by a horrible loud screech via the audio system
2a. Key bob will not lock or unlock doors
2b. External finger sensor on drivers side (LHD) door handle will not lock or unlock doors
2c. Internal door handle/lock combination lever will not lock or unlock doors (both front doors)
3a. Key bob will not unlock trunk
3b. External truck pressure pad under trunk trim lip will not lock or unlock trunk
3c. Internal trunk release will unlock trunk
3d. Trunk soft close activator works correctly
3e. With trunk open, external trunk release pad under trunk trim lip will cycle unlock mechanism when pressed
4. ABS module code U0101-00 Intermittent lost communication with transmission control module (Autel MD806)
5. PCM - (powertrain control module) no codes
6. RCM - (restraint control module) U0101-00 Intermittent lost communication with transmission control module
7. TCM - (transmission control module) no codes

Work that has been done so far:
1. Technical Bulletin JTB00216 "Luggage compartment will not open / rear parking aid camera inoperative", replaced trunk wiring harness, completed
2. Front and rear bumper covers have been removed, all parking aid sensors and wiring has been resistance tested, no open circuits, connectors cleaned and dielectric grease applied
3. Key bod transmission tested (Autel TS508)- 100% at 315MHz
4. Main battery replaced and tested, 12.6 v
5. Secondary battery replaced and tested
6. Battery in key bob replaced with new 2023 battery
7. Key bob will turn on/off main driving lights
8. James Bond/Vespa martini prepared, shaken, not stirred, and consumed by both myself and wife, feel better, but no additional diagnostics

Very puzzled by why the TCM does not show U0101-00 while the RCM does? Why would the RCM show a code for the transmission control module?

Next stop trace wiring from transmission control module to ABS control module.

Any ideas or HELP would be greatly appreciated.

 

Update: I checked for the washer pump water wicking problem by removing the right side forward kick plate and examined the BCM (Body Control Module) located just inside the panel. I removed the connectors and could not observe any corrosion in the connectors or module. The investigation continues . . . .