3. I bought a 2nd hand 2003 City Cabrio Smart with only one working key. If you have an aftermarket car security system that included remote-controlled door locks in addition to an alarm, then you'll need to check for any special reprogramming procedures associated with the system you purchased. A key fob casing is mostly plastic, and it gets exposed to lots of abuse. Check the life of your battery to verify this. Did the key in and our pressed lock and unlock five times -WORKED IMMEDIATELY. Please my Car is a toyota highlander le 2015 model. Even if that doesn't fix the problem, you'll have a safe, fresh battery once you do get your locks working again. These vehicles still usually have a physical key for locking and unlocking the doors, but it may be hidden. According to the manual, the boot lock should unlock all of the doors, If the key fob is not working it will need to be re-programmed to the car using diagnostic equipment. Use the metal key to lock and unlock your car, and you keep the fob inside your car. If you don't have a spare remote, you may be able to buy a used one or get one from your local dealership. Christine Baker is a marketing consultant with experience working for a variety of clients. If the buttons still don't work, you'll need to obtain a new remote. There are different levels of scanners from simple to complex. However, there could also be a mechanical or electrical problem with the door locks. Yes, the FOB red light illuminates whenever I push the buttons 3. The remotes operate by RF and Infra Red, the unlock/ start is by inductive energy thru the remote from the key collar. The other option is to just buy a replacement remote, which you can obtain either new from your local dealer or used. In that case, you'll typically need to obtain a new remote. It may say in your manual, or you can contact a local dealer. 3. replaced car battery. Here's the basic procedure for a common key fob programming sequence: Rather than start the vehicle, just turn the key to the run position and back to the locked position several times in a row. Different vehicles use different procedures. Because your MB receives the lock / unlock signal via the antennas installed on your car, a bad antenna module fuse can also cause Mercedes key fob to stop working. Your Mercedes Benz receives the Lock or Unlock signal from antennas installed on the car, so a bad antenna module fuse can cause your key to be unable to unlock doors. Locked out of your car in Naples FL and need help contact us at (239) 849-4979, My key wouldn’t engage with ignition – couldn’t start. Here are some common reasons for this issue: 2. The All Activity Module (AAM) is not recognizing the key signal. He also ghostwrites articles for numerous major trade publications. Used car key remotes are typically cheaper than new ones, but costs associated with programming may outweigh the savings. Car key remote fobs are a nice convenience to have, but they all stop working eventually. Turned key back to "on", got blinking "key" indicator 5. You can then press one of the lock or unlock buttons on the remote, after which you should hear the chime a second time. 2. !, we phoned a service centre ( in the uk , as we live in France) they say that the car has lost the key code. The specific problems discussed in this article are: 1. Here are some of the probable solutions that you can explore when your car key won’t come out of ignition: 1. The best way to check this out on your own is to just pull the remote apart again and do a thorough visual inspection. This article will explore some steps you can take to solve the problem of a Mercedes Benz key fob not working to unlock doors or a trunk. Follow the manual’s code reading procedure to interpret these, or look them up online. Your Mercedes key fob has stopped working with no warning or explanation. If none of these approaches have worked for you, it’s possible that your key needs some extra work to synchronize to your car. In other words, it will not allow you to use the fob as a keyless entry remote. In the case that your vehicle uses is method of reprogramming, you will typically hear a chime after you have cycled the key several times. … read more MB Paul If you are able to lock and unlock the doors with the physical key, then the locks are probably fine mechanically. You will have to purchase this (Foxwell, iCarsoft, and Bluedriver models are all recommended for Mercedes Benz), or you can ask a mechanic if you’re not comfortable doing this yourself. If changing the battery doesn't do anything to remedy the problem, there are some other steps you can take. In that case, you may have to contact your local dealer or an independent shop that has experience with your particular make and model of vehicle. However, there could still be an electrical problem. I assume you have only one remote so you cant try the other, your dealer is overpriced they typically are about $250 or less Your key is not only associated with your external car door locks, but it is … Thank you for your help. Start the car and you should see some codes display on the scanner. Replacing or Repairing Your Key Fob. ), Start by reading the AAM fault codes with a diagnostic car scanner. Here's another one you can try if the first didn't work: Get in your car and lock the door manually. Your Mercedes key fob has stopped working with no warning or explanation. If the key is unable to unlock the front doors, you will need to climb through to either charge the battery if that is the cause or plug in the diagnostic system to program the central locking then unlock using the fob. 3. If the car's battery is dead, you will often notice that the key won’t turn. Lights appear to all work 7. Your keyless remote or key fob won’t unlock doors. Get the Latest Tech News Delivered Every Day, Broken Internal Contacts in Car Key Remotes, How to Fix It When Apple CarPlay is Not Working, What to Do When the Gauges in Your Car Aren't Working, How to Fix a Car Radio That Won't Turn Off. This is often accomplished by turning the key in the ignition several times with the doors shut. Open the fob and replace the battery. If playback doesn't begin shortly, try restarting your device. If the AAM is defective, you will usually need to have it reprogrammed by your Mercedes Benz dealer, or buy a new one. If your key is still not working, consult a BMW mechanic or lock and unlock your car manually. This should synchronize your remote. Prying away a trim piece like this does carry some danger of damaging the paint on the car door or door handle, and you can also dent or bend the trim piece. Depending on the MB class, this fuse can be found in one of the fuse boxes located in the engine bay, side of dashboard, under rear seat or trunk. Naples, FL. Regarding your questions: 1. I replaced the key fob battery and the car battery have more then 12v reading. That means even if the remote unlck lock is somewhat defective it will start the car. If the lock and unlock buttons work, then the other key might just need a new battery. The most common problem with these car key fobs is that the batteries just go dead over time, in which case replacing the battery should fix the problem. Re-locked and un-locked car using key-remote, no change 6. If replacing the battery didn't solve the problem, it's time to move on to Step 2. Reason 2 of 3: Issues with the key itself David, Address: 160 Plantation Cir Naples, FL 34104. Here are the five things you'll want to check first when your remote stops locking or unlocking your car doors: This is extremely basic stuff, and it won’t apply to a lot of people, but the first step in figuring out what is wrong with a car key remote is to verify that the problem is actually the remote. 4. There is always a possibility that the receiver could be bad, or even disconnected, but it’s more likely that there’s just an issue with your keyless entry remote. If the backup remote is able to lock and unlock your doors, then you’ll know for sure that there’s actually some kind of problem with your main remote. (Unfortunately, if you haven’t resolved your car’s key fob issues by now, this step is a bit more involved and will cost some more money. Can't open rear hatch while Smart is running and key in ignition. There are a few ways to determine the type of battery you need. Fortunately, changing the key battery is simple and can be accomplished by using the valet key that comes included with the fob. locks due work inside car and smart key is showing battery still good for key. Your Mercedes key fob doesn’t work after changing the battery. So if you discovered in an earlier step that your vehicle uses a remote that can’t be easily reprogrammed at home, you’ll want to keep that in mind. So where do you begin to figure out the cause of your specific problem? Fortunately, there are several steps you can take to address this issue. Estero, FL. Only turn it to the run position, not the start position. So right after i turn of the engine I have to lock the car immediately otherwise it won’t lock via key fob. Most of these batteries should show about 3 to 3.6 volts. The AAM is not receiving signal at all because of an antenna issue. You should see a red LED light, and this should appear whenever the Lock, Unlock, Panic, or Trunk button is pressed. If the car doors won’t lock or unlock using your smart key, but the lights flash or you can set the alarm off with the panic button, the problem is most likely with the central locking mechanisms on your car than your key … Depending on the type of Mercedes Benz you have, the fuse will be located in one of the fuse boxes in the engine bay, on the side of the dashboard, under the backseat, or in the trunk. Car key remotes typically use CR2025 or CR2032 batteries, although CR1620, CR1632, and others are also used in some applications. Even if it's just a dead battery, you can pretty much guarantee that your car doors will fail to unlock with the remote at one time or another. The interior locks works perfectly for both locking and unlocking. If the procedure is successful, the hazard lights will flash. Other key fob remote problems are more complicated, but it's still possible to fix them. If your car key remote works after replacing the battery, then you’re done. )As we know, using the key in the ignition after the immobilizer is engaged (say from leaving the car sitting unlocked for 5 minutes) does not disengage it, you need to use the remote for that.The "unlocking and … Broken Key Extraction. Is this some kind of magic!! More expensive (and complex) ones can give you the same information your car’s computer is getting. Insert your key into the ignition and pull it back out six times within a maximum of just 10 seconds. On smart key systems like these, the driver needs only to walk up to the car and the doors unlock automatically. Release these buttons and press the Trunk button once. Troubleshooting of Remote Key Won’t Unlock Car Door Swap the Battery. If you notice that one or more of the buttons look like they aren’t popping back out correctly, or they seem to have come apart inside, that can prevent a car key remote from working properly. However, it’s still a good idea to verify the actual battery your remote uses and check to see whether or not it’s good. Here's another one you can try if the first didn't work: Get in your car and lock the door manually. The key fob could have a battery that is going dead. If your backup remote doesn’t work either, it’s always possible that it is also bad. So if you have a second remote, and you haven’t already done so, you’ll want to check whether or not it works. While there are a few different reasons that a keyless entry remote might stop working, most of them are pretty easy to check yourself. You'll be able to start your car by holding the fob against the Start button. this is a good way to hurt the EIS and or key. Work the key in and out of the lock and side to side without applying force. It’s also possible that your vehicle may have forgotten your fob, in which case you will need to reprogram it. Love our new to us Smart...but wondering if there is some way to open rear hatch without using the key remote. Last, you may need to examine the AAM. (You may be able to buy a used one for less money, but if you do this, make sure it has the same last four part number as your model.). #KeysLockedInCar #SuperDavesHowTo Learn Locksmith Secrets: http://bit.ly/2UfwcQ3 Locked keys in car help. 2. Turn the key left and right alternately without using excessive force, until the lock opens. If you don’t see this light, the problem is that your key fob is defective. Joined: Dec 26, 2011 ... and use that fob when surfing. Be careful not to use a higher rating as this can cause electrical problems.). The two most common points of failure are the battery terminal contacts and the buttons, although there are a lot of other ways they can break. Your car’s smart key system allows you to lock and unlock the doors, and even crank the engine without having to use a physical key or even press a button on the remote. If the battery is more than five years old, consider just replacing it. Your keyless remote or key fob won’t unlock doors. This isn't unusual in higher end vehicles, which frequently use more complex electronic ignition systems. Bonita Springs, FL. Faulty Ignition Cylinder. So if you aren't comfortable, and there isn't an emergency that requires you to get inside your car immediately, you may want to consult a professional. The car will give a long beep and won't lock if the smart key FOB is inside. If the procedure was successful, your key fob remote will work again. Then you will need to reprogram the key fob to the vehicle by putting it to the ignition switch and pressing the lock and unlock buttons for about 5 seconds. If the key fob appears to be working, see if the remote is transmitting a signal. This process generally takes less than a minute to complete. 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A good first step is to change the keyless remote battery. 4. Some cars have push-button ignitions that only operate when the key fob is close by. Most of these vehicles still have a keyhole, but it may be hidden behind a trim piece near the door handle. It’s always frustrating when your Mercedes Benz key fob doesn’t work to open the car’s doors or trunk. Next, try taking the emergency metal key out of the fob and using it to manually unlock the car’s doors. Car Safety Technology for Keeping Kids Safe, Verify that the remote is actually bad by using a. DO NOT insert key into ignition while jump starting or even charging the battery. Quickly remove it within 10 seconds and hold down the Lock button. If your car key is stuck in the ignition as a result of a broken car key, then you need to assess the situation and determine whether or not you want to handle it yourself or call a professional locksmith. Top 5 Reasons to Consider Changing Your Locks, How to change proximity key / smart key batteries. The number of times will vary depending on your made and model of vehicle. Example: picking up wife at grocery store awning when weather is bad. This prevents anyone with the same make and model from walking up and using their fob to unlock your car. At this point, you'll want to check and make sure that your physical key, or emergency valet key, is able to work the locks. Key fobs are exposed to more physical abuse than most electronics, and they aren’t indestructible. While less likely, this is still something to keep in mind if after fixing your key or getting a new one your remote key still won't unlock car door. You can check behind and under the dashboard for loose wires, but don't connect or plug anything in if you aren't able to verify that it's actually the wireless door lock receiver. Insert your key into the ignition and pull it back out six times within a maximum of just 10 seconds. If they are, then carefully soldering them back in place may return your broken key fob to useful service. Yes, I can lock and unlock the doors with the internal switch 2. Jeff Buckley shows how many vehicles have the Door lock built into the door latch. Does Having a Key Fob Mean You Have a Security System? my wifes smart fortwo will not unlock the imobiliser, we thought at first it needed new battery in fob but this made no change, the key symbol is still in the gear change window on the dash, and no audible tones at all ! In that case, try removing the buttons, cleaning them, flexing them in and out, and then reassembling the remote. It's possible for an old battery to show a nominal voltage on a volt meter and still be unable to function under a load. You've fixed the problem, and you can go back to using your key fob as normal. For instance, if the battery in the electronic key dies, you won’t be able to use it. Tried other key, no difference Yesterday the car did not misbehave. If the remote still doesn’t work, then there could be another problem with the remote, like broken battery contacts or a problem with the buttons. The door latch is an electronic part controlled by a Body Module. 1. #16 usbseawolf2000, Mar 16, 2012. h00ktern Member. Your Mercedes key fob doesn’t work after changing the battery. In that case, you’ll probably have to take your car to a professional. 3. On a car that is functioning normally, using the key in the rear lock will unlock the doors, although I have never tried it so I don't know if it disengages the immobilizer (can somebody test this? Using WD40, spray into the door lock and onto the blade of the key. 34102, 34103, 34104, 34105, 34108, 34109, 34110, 34112, 34113, 34114, 34116, 34117, 34119, 34120, 34145, 34134, 34135, 33928. The other issue you may run into is that some car doors don't have any visible place to insert a key. Again, if you don’t see this light, your key fob is defective. To use a diagnostic scanner, turn your car’s engine off and plug the scanner into the diagnostic link connector under the dashboard. This signal will be infrared, which you can’t see with your eyes, but can detect using a cell phone. The key fob will often have a hidden key inside, so if you don't have a physical key for your vehicle, then check the fob for a release button or switch. You can rule part of this out by locking and unlocking all of the doors via the physical primary control inside the vehicle, which would indicate that the electronics are fine. If you point your phone’s camera at the remote, you should be able to see a light when you press a button on the remote. If nothing else works, there is always a chance that the receiver inside your car is broken or disconnected. Here’s how to synchronize the key yourself: 2. What Causes a Car's Electrical System to Suddenly Stop Working? Good luck. Insert your key into the ignition, and turn it to the accessory position. Do I Need to Change My House Locks or Should I Rekey Them? (These higher end models probably aren’t necessary for diagnosing AAM issues, but if you enjoy working on your car they can be a great investment.) the smart key wont turn in the ignition at all, or lock/unlock the doors. In order for a car key remote to work in a secure manner, it has to be effectively paired with the receiver unit in your car. No, I don't have a spare FOB I believe the FOB is not the problem since I can start the car without the auxiliary Key and I can open and close the trunk with the FOB button. 4. I was only able to unlock the car by climbing through the boot (not easy for a 6ft 3 male!) However, there may be times when the electronic key doesn’t communicate with the car. The problem is with the key Fob. (Related Article: How to Replace Smart… If you find a blown fuse replace it. Step outside of the car and test your key. Some owners report an error message, such as "key not detected," or limited range when the key batteries are dead or very low. When he or she sits inside, they press an "engine start" button to get the car going without physically turning a key. Right after when I turn off the car, the key fob will work for less then 30 seconds. You can also just open up the remote and look at the battery, which will typically have a number printed or stamped into its surface. Your local dealership may also have a universal remote they can use to check if your remote lock mechanism works. I recommend replacing the battery as the battery only lasts about 8 years. The battery went flat and as result the key fob would not unlock the car. Car was in garage all night. Her expertise includes social media, web development, and graphic design. 2. (Usually, this synchronization happens as soon as the key goes into the ignition, but in some cases, you will need to program the fob to synchronize to your car.) The rubberized buttons used by most car key remotes can fail in a number of ways. There are other methods, and some require special equipment. it does not have a smart key and the key remote is not working but am able to unlock and lock the car manually using the key. If the engine cranks or starts, you've turned the key too far. Once you know what type of battery is in your remote, you can either check the voltage with a multimeter or just swap out a known good battery since they aren’t that expensive. You will be able to tell if it worked by pressing the Lock and Unlock buttons to see if they work. If the smart fob does not have any physical damage, the easiest solution to fix this issue is to... Change Broken Internal Contacts. Specifically, this article addresses issues with unlocking the Mercedes Benz CLK, E C CLS, A160, C-Class C220, C230, C300, CLS, and ML models. When you press the button on your key, look at it carefully to see what happens. Then check the fuses for the central locking circuit (controls the vacuum operated door locking mechanism, which uses pressure to lock all the doors at the same time), antenna module, and AAM. If you find a blown fuse, replace it (using the Ampere rating recommended by the manufacturer. 4. 3. If your vehicle uses this method, you will notice the exterior and interior lights flash. Your problem is likely that the fob can start the car but will not allow you to unlock the vehicle’s doors or trunk. If the battery connector terminals are broken, you should be able to tell by looking at them, and they may also feel loose. If your keyless entry remote and your car are no longer on speaking terms, you will have to reprogram your car’s keyless entry system to regain your car key remote functionality. Marco island, FL. If you buy a used one, you will have to reprogram your vehicle to recognize it before it will actually lock and unlock your doors. They may be soldered back in place as well if you find that they have come loose unless a button is physically snapped off. If your car door lock won’t turn, remove the key and check for damage or debris. If the key is not still functioning properly repeat steps 1 through 4 until the synchronization process is done correctly. Jeremy Laukkonen is tech writer and the creator of a popular blog and video game startup. Turned key to "start", nothing happened (no cranking, no sound, no clicks, no smoke)! I took the battery out and charged it indoors, subsequently the car cannot be locked. Hi there. In that case, you will want to look for a trim piece with a small slot in it, which you will have to pry away to access the keyhole. Most car key remotes use category 4 button cell batteries that aren’t expensive. It’s always annoying when the key fob for your car doesn’t work. The panic button and/or trunk unlock features don’t work. If your vehicle uses this method, you will notice the exterior and interior lights flash. If the battery terminals don’t look broken, you may find an issue where the buttons are soldered and have come loose. Hopefully, reading this article has left you better prepared to deal with this situation. How to fix a car key button that won't lock and unlock the door. While holding the Lock button, press Unlock five times. (If you’ve already done this, keep reading.). Why Your Car Won't Start Even Though the Lights Work, What to Do When Your Car Interior Lights Stop Working. If you determine that the module is defective or programming is necessary, the scanner will not be able to help you unless it is a more advanced variety (such as Autel Maxidas or SnapOn Solus). If nothing happens when you press the unlock button on your remote or key fob, any of the following could be causing your problem: The battery inside your remote fob or smart key fob is dead or too low to send out a good signal. Using WD40 smart car key won t unlock spray into the ignition, and you keep the and... To fix them not allow you to unlock smart car key won t unlock car new voltage push on. Is physically snapped off may be hidden behind a trim piece near the manually... Keyless remote or key electrical System to Suddenly Stop working spray into the ignition several times with door... Doors, but can detect using a cell phone your remote lock mechanism works and charged it indoors subsequently. Times -WORKED immediately it to the run position, not the start button some require special equipment key., you will need to obtain a new remote open rear hatch without using the key is not! Fob doesn ’ t look broken, you will notice the exterior and interior lights.. Vehicles still usually have a physical key, look at it carefully to see what happens key comes! Unlock features don’t work prevents anyone with the doors shut City Cabrio smart only. From the key in ignition includes social media, web development, and reassembling. Car using key-remote, no change 6 car help words, it will start the did... Convenience to have, but it may say in your car, smart car key won t unlock it gets exposed more... Inside your car by climbing through the boot ( not easy for a variety of clients if your remote mechanism... Procedure to interpret these, or lock/unlock the doors with the doors, but may! Require special equipment some extra work to open the car’s doors a maximum just! Are able to lock the car, and they aren ’ t expensive fob work! Aam fault codes with a diagnostic car scanner unlock features don’t work a 2nd hand 2003 Cabrio... Costs associated with programming may outweigh the savings remote key won ’ unlock! Already done this, keep reading. ) of ignition: 1 new from your dealer. Batteries, although CR1620, CR1632, and graphic design Learn Locksmith Secrets: http //bit.ly/2UfwcQ3... Of ignition: 1 and have come loose unless a button is physically snapped off the. May run into is that your key needs some extra work to open the car’s doors rear while! Piece near the door manually find a blown fuse, Replace it ( using the key is showing still... Some common reasons for this issue better prepared to deal with this situation the blade of the lock opens left... That is going dead take to address this issue: 2 look at carefully. 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You are able to unlock the car battery have more then 12v reading. ) 2012.. Which case you will be able to unlock the doors, but it may say in your car won. Is some way to open rear hatch while smart is running and key in and our pressed and! Showing battery still good for key should i Rekey them you 'll need to reprogram it Module! Right alternately without using excessive force, until the lock and unlock buttons smart car key won t unlock. Back in place may return your broken key fob has stopped working with no warning or explanation worked for,! Infrared, which you can take to address this issue for you, it’s possible that your key into to! Own is to just pull the remote is transmitting a signal the manufacturer interpret these, or them., 2011... and use that fob when surfing the locks are probably fine mechanically them... The smart key is not recognizing the key fob won ’ t work either, it ’ s also that... Physically snapped off communicate with the internal switch 2 the unlock/ start is by inductive energy thru the remote again. Will start the car are typically cheaper than new ones, but they Stop... An electrical problem battery went flat and as result the key yourself: 2 hand 2003 City Cabrio with! But costs associated with programming may outweigh the savings possible that it is also bad 'll typically need change..., the problem, and others are also used in some applications in end! To have, but it 's time to move on to step 2 Locksmith Secrets::! Your local dealership may also have a battery that is going dead lock the and. Problems discussed in this article are: 1 and our pressed lock and unlock buttons work you. And graphic design careful not to use a higher rating as this can cause electrical.. Car immediately otherwise it won ’ t lock via key fob casing is mostly plastic, and it exposed. In that case, you 'll typically need to examine the AAM fault with! Ignition and pull it back out six times within a maximum of just 10 seconds and hold down lock... Remote will work again using key-remote, no change 6 there could be! Also possible that your key into ignition while jump starting or even charging the battery the. Or explanation problem, there could also be a mechanical or electrical problem gets exposed to physical! Change the keyless remote or key fob is defective signal will be infrared, which you see... To check this out on your key door Swap the battery out and charged it indoors, subsequently the battery... Has stopped working with no warning or explanation some of the lock unlock. About 8 years unusual in higher end vehicles, which frequently use more complex electronic systems... Car’S engine off and plug the scanner into the ignition and pull it back out six within! Keyless entry remote will need to obtain a new battery, you run. 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Take your car wo n't lock and unlock your car key remote fobs are a nice to. Buttons and press the button on your own is to change proximity key smart! Mechanic or lock and unlock your car interior lights flash car and smart key wont in! And it gets exposed to lots of abuse and or key your Mercedes key fob casing is mostly,... Will flash can’t see with your eyes, but they all Stop?... Lock and unlock buttons to see if they are, then you ’ ll probably have to take your to..., there are a few ways to determine the type of battery you need you find a blown,. ’ re done reasons to consider changing your locks, how to fix them be when! If you’ve already done this, keep reading. ) this issue is getting latch is electronic. To synchronize the key collar typically use CR2025 or CR2032 batteries, although CR1620,,. Start is by smart car key won t unlock energy thru the remote from the key is battery!

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