Original link: https://www.ixiqin.com/2023/05/19/%E9%9B%AA%E9%93%81%E9%BE%99-c3-xr-%E8%87%AA%E9 %85%8D%E9%92%A5%E5%8C%99%E8%AE%B0%E5%BD%95/
Since I bought a second-hand Citroen with only one key, but my girlfriend and I can both drive, for the convenience of driving separately, and for the convenience of keeping a key as a backup, I decided to configure another key so that A rainy day.
The principle of car key distribution
Today’s car keys often use 300Mhz ~ 400Mhz radio frequency signals, and the signal receiver on the car receives the corresponding signal and performs subsequent operations.
The principle of car key matching is also the same. The new signal rules (let’s call them rules, in fact, there are more complicated signal designs) are written into the new key to complete the key pairing.
Depending on the security configuration of the car company, there may be some security procedures. For example, my Citroen cannot add keys. To configure, you must flash the old key and rewrite the new one. Append mode is not supported.
What do I need to prepare?
- Go to Taobao to place an order, buy a key that is the same as your car model, and take a photo of the teeth of your car key to the other party, so that they can help you open the teeth on the key.
- Find Taobao customer service and rent a device with a key.
Specific steps
1. Receive the goods, tap the materials
After you receive the goods, you should receive the following items:
- A brand new key with pre-cut teeth, which can be used to open your car door (by inserting the keyhole), but it will not start the car.
- A read-write device based on OBD interface, as shown below.
2. Insert the device into the OBD interface of the car.
Connect the OBD device and connect the OBD interface with the car. Different cars have different positions, but most of them are on the driver’s side.
3. Start the App for device pairing
When you receive the goods, you can contact the buyer to learn about the docking app of the relevant device. The seller will give you the app information, download and install the relevant app, and connect your current device in the app.
4. Perform anti-theft matching
There will be different functions in the app. Here I choose [Anti-theft Matching]. After selecting it, download the resource package to perform corresponding anti-theft matching. Here, depending on different apps, the operation will be different, and the specific operation is subject to the guide instructions of the store.
Summarize
Before, I thought it was a very complicated thing to assign keys to a car, but after the actual configuration, I think that overall, the difficulty is not bad, especially now Taobao sellers have ready-made tools for you to use, for novices Said, the cost is greatly reduced. And one advantage of configuring it yourself is that you don’t have to worry about risks. The possibility of sellers in other places will be greatly reduced. If you have a request, you can try it yourself.
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