Remote keys and ignition keys in Volvo P2 vehicles
Volvo platforms are describedhere: VOLVO platforms
The ignition key and the remote control in Volvo P2 platform vehicles are separate, and essentially, they do not relate to each other at all. The ignition key enables the vehicle to start, and its code is verified by the central CEM unit, where it is stored. However, each Volvo has its unique digital identity, or TRN code, which is retroactively recorded into the ignition key. Thus, it is essential that these two codes always match; otherwise, the key will not be approved by the CEM unit, and the vehicle won't start (assuming the rest of the immobilizer codes within the vehicle match). For these purposes, the Volvo P2 platform uses a capsule labeled ID48. With VDASH, you can easily upload ignition keys if the immo code is available for your Volvo. VDASH can read this code from the majority of Volvo vehicles through the OBD port, allowing you to delete and add new ignition keys without further requirements. PIN codes are explained here: Volvo PIN codes explained
The situation with the remote control is slightly different. The remote control, or its codes known as seed and remote code, are uploaded to the UEM unit (the rearview mirror). This is why, when replacing a "leaked" mirror with another from a scrap yard, the remote controls stop working. However, with VDASH, it's possible not only to add keys but also to clone or transfer them from one vehicle to another. It's even feasible to pair one remote control with multiple vehicles, as the seed and remote code are only uploaded to the car (UEM), but the vehicle's identity, or TRN code, is not uploaded back into the remote control. Using VDASH, you can upload a new or used remote control to any Volvo P2 platform vehicle. All you need to know are the seed code (16 characters) and the remote code (8 characters). VDASH can extract these codes from any mirror (UEM) and securely store them for future use. However, it's crucial to label the remote control so you can identify it later in the system.
If you only have the remote control without its codes or the UEM unit, unfortunately, its codes are irretrievably lost, and it cannot be used in the future.
For the remote control, it's always necessary to pair the corresponding frequency that the UEM unit supports. Typically, for the EU market it's 443 MHz and for the USA it's 315 MHz. You MUST always adhere to the correct frequency for your Volvo; otherwise, the remote control will not function, as the UEM unit won't "hear" it due to broadcasting on a different frequency.
When transferring remote controls from one car to another, it's important to ensure compatibility within the following model year groups:
MY1998 to 2001
MY2002 to 2003
MY2004 and newer
