• Park the vehicle, engage the hand‑brake and turn the ignition to “ON”.
• Connect a 70 A + battery maintainer to guarantee a stable voltage.
• Insert a certified JLR Enet Wi‑Fi adapter into the OBD‑II port.
• Launch TOPIx on a laptop with internet access; log in with engineering credentials.

1. Select Vehicle → Identify → Body Control Module (BCM) and click “Read CCF”.
2. Locate the array KeyIDList. This list holds up to 8 48‑bit IDs (factory‑fitted keys).

3. Insert the new Additional Key into the programming port.
4. Press the “Program” button on the key for 2 seconds; the key will emit its encrypted ID.
5. In TOPIx click **Read Key ID** – the software will capture the 48‑bit value (e.g., 0x1A2B3C4D5E6F).
6. Add the captured ID to KeyIDList (e.g., slot 5). Save the edited CCF.
7. Press **Write CCF** – TOPIx automatically updates the checksum.

• After a successful write, run BCM → Self‑Test → Key. The test will request the newly added key to lock/unlock the doors.
• Press the lock button on the Additional Key – doors should lock within 1 second.
• Clear any DTCs such as C0A70‑00 – Key‑ID Mismatch using the “Clear Fault Codes” command.

• Power‑cycle the vehicle (IGN OFF → ON) and repeat the lock/unlock test to ensure the key is retained.
• Run a quick “All Systems OK” scan in TOPIx – any remaining DTCs must be cleared.
• Record the new CCF checksum and programming date in the service log as proof of a factory‑approved key addition.

Yes. As long as the BCM hardware includes the “KeyIDList” array (present on all 2020‑2025 builds), the key can be added via the TOPIx workflow.

No. The key is a passive RFID device; it draws power only when the driver presses a button. There is no continuous draw from the vehicle.

When programmed with the correct TOPIx activation, it enjoys the standard 12‑month/12 000 km warranty. Keep the programming checksum as evidence of a proper install.

The primary fault is C0A70‑00 – Key‑ID Mismatch. After re‑adding the key and confirming the lock/unlock test, the code can be cleared.