VVDI BE Key Update Features:

1. Resolved the issue where W164/W639 EIS data wasn’t syncing with the key.
2. Fixed the problem where the BE key couldn't start the ignition after multiple attempts.
3. Corrected the bug affecting trunk remote opening.
4. Improved RF signal transmission; the key now sends the RF signal twice when pressed and released, rather than just once after an update.
5. Refined the rolling algorithm to correct errors in the BE key.
6. Introduced a pre-roll algorithm, allowing the HASH value to roll ahead.
7. Upgraded to a car-grade quartz crystal for enhanced infrared communication stability.
8. Increased the strength of the infrared signal when the button is pressed.
9. Added support for switching the key frequency between 315 MHz and 433.92 MHz using the VVDI MB tool or the PCB SMD resistor.

Tip: The VVDI MB tool takes priority over the SMD resistor. If you reset the key frequency with the VVDI MB tool first, the SMD resistor method won’t work until you use the tool to erase the frequency setting.

Methods to Reset Frequency:

1. Using the PCB SMD Resistor: Solder a 1K SMD resistor to the indicated position for a 315 MHz frequency. Removing it will set the frequency to 433.92 MHz.
2. Using the VVDI MB Tool: Switch between 315 MHz and 433 MHz frequencies with the VVDI MB Tool.