Hello everyone,I am working on upgrading the telematics (VCM module) on a 2016 Volvo XC90 (built October 2015) from 3G to 4G/LTE using VDASH, and I would highly appreciate some technical guidance regarding the wiring loom conversion.Current Setup & Hardware:Vehicle: 2016 XC90 – early SPA platform, US-spec import.Old VCM (Factory): Part No. 31450592 (3G VCM, North American frequencies, completely obsolete in Europe).New VCM (Donor): Part No. 31489419 (European 4G/LTE VCM High module).The Issue – Connector Mismatch:Upon removing the old unit, I ran into a hardware incompatibility with the main wiring harness connector:The factory US 3G module utilizes a shorter, green connector.The replacement European LTE module (31489419) utilizes a longer, black connector with visibly more pins/channels.From what I understand, early 2016 models rely on a split architecture with a separate TEM (Telematic) module in the trunk. The newer LTE VCM integrates these functions, requiring a harness adaptation and a bypass of the old setup.Plan of Action:Since the replacement VCM is a used unit and came without the donor's pig-tailed plug, I intend to purchase the official Volvo Wiring Harness Repair Kit (Part No. 32200315 / 31456637), which includes the new black plug with pin-wires for splicing. I will also get the MOST optical loop/bypass terminal (Part No. 31409752) for the old TEM module in the trunk.The CEM PIN decoding and programming will be handled entirely via VDASH. I plan to alter the Car Configuration parameters (Telematics/VCM type) to reflect the new LTE architecture and adapt the donor VCM to my vehicle's VIN.Questions for the Community and the D5T5 Team:Does anyone have a definitive pinout diagram for converting the wiring from the old green plug to the new black plug on the SPA platform?Are there any specific configuration hurdles in VDASH when changing the software profile from US 3G to EU LTE for this specific part number (31489419)?Will the car successfully get onboard Wi-Fi/data connection just by splicing the main power/CAN lines to the new black plug, or is it mandatory to re-route the antenna lines all the way to the trunk to get Volvo On Call (SOS app) functionalities working?Any advice, wiring diagrams, or shared experiences from anyone who has successfully completed this swap using VDASH would be greatly appreciated!Thank you in advance!
