Personally, I do not like either starting the engine from the outside, or long-range key chains. Immediately thoughts come about an apartment that suddenly unlocks while you are sitting at work … For me, it’s better to turn the key in the well. At the same time, I understand: our country is not the hottest, many are pleased to get into a warm car on a frosty morning. And in the summer - in the cool.
Of course, devices like "Webasto" or "Ebershpeher" do a great job of preheating. With the daily operation of the machine, they, in general, do not create problems. However, there are spots in the sun: there is a rather big price, and the current consumption, which reaches double-digit values during operation. The latter can come around with the fact that the battery, having used up the energy to warm the car after a long stop, refuses to start the engine. And if you remember about summer again, then there is one more minus: it is definitely impossible to pre-cool the interior in this way.
All problems removes the remote start of the motor. Every second signaling, it would seem, is ready to do it, but a regular immobilizer gets in the way, who does not understand such jokes. He works on the principle of radio frequency identification (RFID) and wants to “see” his native key with a miniature transponder (chip) built into it, and not listen to the clicks of a relay from some signalization. So what to do?
This technique of bypassing the immobilizer is awkward: turn off harmful electronics completely! With little blood, this is far from always achieved, except in cars for the American market. The process is simple: the serviceman delves a bit into the programmable immobilizer - and you're done.
+ The problem is solved.
We install any long-range signalization and start the engine by pressing a button - at least from the balcony.
- The machine loses its full-time guard.
And if you got something “crooked” that was easily intercepted by all kinds of code grabbers as a new signaling, then do not be surprised if someone else leaves in your warm car.
It’s also awkward: to hide in the car one of the regular car keys. Then the immobilizer will decide that the owner is already driving, and will allow remote start of the motor. Today it is the most popular technique.
To do this, they release the so-called immobilizer bypassers: a kind of boxes with a simple filling, where the installer hides a spare key from the car for eternal storage. And since the keys exist in different guises, the boxes are also different. For the lineman to work, you need to send him a signal from a long-range keychain from a suitable car alarm.
The simplest option is for cars with the usual appearance of an ignition lock for a mechanical key with a chip, as well as for those where the key is placed in a slot. Examples are in the photo.
1 Typical Chinese.
It is curious that there is no microelectronics in it. The principle of operation is like a primitive transformer with two spaced windings. The first winding in the form of a wire ring is located near the standard ring antenna at the ignition switch. The second winding is in a box: an ignition key or a chip torn from it is thrust into it. The crawler uses the energy of a standard antenna of a car reader. At the signal from the key fob, the relay is turned on and the chip gives out its data. The immobilizer recognizes his own (he really is his own!), After which he gives the go-ahead to start the engine.
2 St. Petersburg version of the simplest lineman from the NGO Starline.
For reliable recognition of the chip at low temperatures, a discharged battery, etc., several connection options are proposed, including to break the antenna of a standard immobilizer.
3 The loop antenna has a limited length, because the simplest walkers do not contain a battery: they use the energy of a standard car antenna. Therefore, their signal is rather weak.
The distance of the device from the ignition switch is limited by a transformer loop. When you try to lengthen it, the signal will inevitably be lost due to interference.
By the way, isn’t it easier to attach a chip from a spare key right next to the immobilizer antenna? It’s easier, of course, but in this case the immobilizer turns into a security guard, whose gates are always wide open. In addition, when the owner uses his key, the two chips can "quarrel" with each other. In general, this cannot be done.
And if the standard key is made on the principle of "free hands"? You carry it in your pocket, and the car smells it from afar - what then? In many cases, the same solution applies, but a more modern and convenient version of the crawler was found. An example is in the photo.
4 Another St. Petersburg lineman from the NGO Starline.
Unlike the simplest colleagues, he is able to work with more modern keys such as “hands free”. The battery is removed from the standard key fob, the power is removed, and at the time of remote start, it is activated by applying external voltage. From this moment, the lineman sees that a regular keychain has appeared in the car. There is no need to throw a wire antenna on the body of the ignition switch, especially since the body itself may not be! Such a lineman can be hidden anywhere in the car: the working range is enough. And the loop does not track it.
5 Kaluga lineman Pandora DI-03 is another example of a universal approach.
It only works in conjunction with Pandora car alarms. The product completely replaces the simplest crawlers, but, unlike them, it is ready to work with keys of any type, including the popular hands-free ones. Stable power for the active key embedded in the crawler allows you to not be afraid that after a year of autostart operation, the key will suddenly cease to be recognized. You can hide such a device in the car away, you do not need to change the batteries in the key.
+ The problem is solved without a clear decrease in the car theft resistance.
The standard key can be hidden away.
- The standard key is still inside the car,which means that if you have the time and desire, you can still reach him. In addition, it should be remembered that not all modern cars allow you to endlessly copy keys: in some cases, there may be a maximum of two.
This option, of course, is the most promising, because it allows you to do without the help of a regular car key. Such crawlers are also called keyless. If the devices described above at the right time turn to the help of a chip hidden somewhere, then this one immediately climbs into the communication line between the immobilizer and the controller, unraveling the exchange protocol (while the immobilizer continues to work as usual!). The specifics depend on the complexity of this protocol: it can be no easier to understand than the dialog code of car alarms. Today, these crawlers can be installed on approximately 900 models of cars. We have already noted that recently it has become a problem to order at least a third key. And the thing is not even that for many models its cost has become five-digit, - in some cases, the car manufacturer does not allow registering more than two keys in it. The owner has one key, the beloved woman has the other, and the lineman has nothing! In such cases, a keyless lineman is the only civilized remote launch option.
6, 7 Examples of crawlers who do not need a regular car key at all are Canadian Fortin products.
In fact, they are already trained in the car with the ignition on. At the same time, Fortin does not try to intercept or emulate a signal from the native key: the device only works with data between the immobilizer and the controller. Depending on how to bypass the standard immobilizer, Fortin uses up to three different channels, including CAN buses. Note that a motor launched from afar can work, but everything else will be inactive: the steering wheel will remain locked, the automatic gearbox selector will remain stationary, etc. This is another fundamental advantage of such crawlers over simpler colleagues.
+ The main thing is that you do not need to hide the key in the car.
And the insurer can always be presented with a complete set. A machine with a running engine remains under guard.
- The technology does not cover 100% of cars.
Most car keys have a miniature transponder built in (it’s also a transceiver, or more simply, a chip). In the simplest case, when the ignition is switched on, the immobilizer through a ring antenna wound around the ignition lock case creates an electromagnetic field around the chip and supplies it with power. He wakes up and in response transfers his “passport data” to the immobilizer. If the chip is recognized as its own, the immobilizer allows the controller to start the motor. Fig. one:
Around the same way, more modern keys are interrogated, without a mechanical disc, which is inserted not into the lock well, but into the slot-slot. Fig. 2:
The hands-free fashion has generated key tags that you can never pick up at all, but just carry in your pocket. In this case, a mandatory element of the car is a receiver that picks up the call signs of such a key. Note that with a dead battery, the motor can still be started up: in this case, the mark is placed in the provided slot, which can excite it. Fig. 3:
But such a scheme can be considered universal. Fig. four: