Do you struggle with the dismal key fob range on your older Toyota Land Cruiser? If you’re an owner of an early-year model, like a ’98, you might be familiar with the frustration of having to be practically next to your vehicle for the keyless entry to work. New batteries don’t always solve the problem, and resorting to unconventional methods like using your head as an antenna amplifier (we’ve all been there!) is clearly not ideal.
Fortunately, there’s a proven DIY solution to dramatically increase your key fob range – by relocating the OEM receiver’s antenna. This modification can boost your range by tenfold or more! While it does require some soldering skills and a bit of under-dash maneuvering, it’s a worthwhile upgrade for anyone tired of short-range key fob woes. This project is rated a multi-banana job for effort, but the results speak for themselves.
Many Land Cruiser owners have successfully implemented this modification, reporting an increase in key fob range from practically unusable to over 100 feet!
The factory receiver box, known as the “Receiver, Door Control” (P/N 89741-60060 for the ’98 LC), is nestled deep within the dashboard, behind the power mirror and vent window switches. This location, surrounded by metal, is far from optimal for radio reception. While relocating the entire receiver box is an option, it involves extending its complex 15-wire harness – a task best avoided. However, a harness extension solution is under development for those interested in full relocation.
What You’ll Need to Purchase (Frame Antenna Key Fob Amazon):
To perform this antenna relocation, you’ll need to acquire a few readily available components. You can find these parts easily online, including on Amazon, by searching for “frame antenna key fob amazon” components or similar terms. Here’s what you should get:
- Coaxial Cable: A 5-6 foot length of small coaxial cable with an SMA female connector. This type of cable is readily available on Amazon. Look for options like this: Coaxial Cable SMA Female Connector Amazon
- 315MHz Antenna: A short 315MHz antenna with an SMA male connector. These antennas can also be found on online retailers like Digikey: 315MHz Antenna SMA Male Connector Digikey
Step-by-Step Guide to Relocating Your Key Fob Antenna:
Let’s walk through the process of relocating your Land Cruiser’s key fob antenna to improve its range.
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Accessing the Receiver Box: The receiver box is located behind the dashboard, which can be a bit tricky to access. You’ll need to carefully remove the trim panels around the power mirror and vent window switches to gain access to the receiver.
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Exposing the Circuit Board: Once you’ve removed the receiver box, carefully pop off its cover to reveal the circuit board inside.
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Identifying and Removing the Stock Antennas: You’ll see two curly wires on the circuit board – these are the original antennas. They are positioned perpendicularly to each other to improve coverage, but their location within the metal dashboard significantly hinders their performance. Carefully desolder these two antennas from the circuit board.
Important Note: Be extremely cautious when soldering near the “C1” component and any other small parts on the board. These components are delicate and easily damaged by a soldering iron. Take your time and avoid accidental contact.
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Soldering the Coaxial Cable: Solder the center conductor of your coaxial cable to the point where the original antennas were connected. The outer shield of the coaxial cable should be soldered to a ground point on the circuit board.
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Connecting the External Antenna: Connect the SMA male connector of your 315MHz antenna to the SMA female connector on the other end of the coaxial cable.
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Testing and Reassembly: Before fully reassembling everything, test your key fob range. You should notice a significant improvement. Once you’re satisfied, carefully reinstall the receiver box and trim panels.
Conclusion:
Relocating your Toyota Land Cruiser’s key fob antenna is a highly effective way to overcome the frustration of limited range. By using a frame antenna and readily available components from sources like Amazon (searching for “frame antenna key fob amazon” parts), and with a bit of DIY effort, you can enjoy a key fob that works reliably from a much greater distance. This simple modification makes a world of difference in the convenience of your keyless entry system.
