VDD Guide

CANALT Wiring for SPA / CMA Volvos

Newer Volvo SPA and CMA platforms require access to the low-speed CAN bus for selected VDD functions to work correctly.

Why CANALT Wiring Is Needed

For VDD to work properly on newer Volvo platforms, specifically SPA and CMA, it needs access to the vehicle's low-speed CAN bus.

Without CANALT wiring, selected VDD functions will not work because the VDD cannot communicate with the required low-speed CAN bus systems.

Functions Enabled by CANALT

The CANALT connection allows VDD to access and use functions such as:

Check the status of doors, locks, and windows.

Enable supported features such as remote parking heater, remote engine start, and other compatible VDD functions.

What You Need to Install

You need to install additional CANALT wiring that connects the low-speed CAN bus to the OBD port.

Installation Guide

Follow our YouTube guide for installation instructions:

Important Takeaway

Even with correct CANALT wiring, your car must already support remote start or heater functions for those functions to work through VDD.

If these features are disabled, they must be activated by a PRO / PRO Verified dealer.