Re: Coupe FOB issue
Hi there
Sorry for the long delay and thanks for the information! Yes, I am afraid when I heard the term fob from Hyundai I assumed that it must be 'FOB' and I capitalised it for a reason I cannot explain - apologies for that. Thanks for the info. I will try to piece together what has been happening for the past four months to try to establish a pattern that I can hopefully present to the Hyundai service center when I take the car in again on Thursday. I am going to be an annoying person who just learnt what a BCM is but wants it checked anyway : ) The brief history I am going to give them is as follows: The first time the RAC came out to help me I could not unlock the car with the key fob. They thought it might have something to do with my working near Heathrow airport - there is constant air traffic. So they showed me how to 'fudge' the remote - holding down two buttons until the flickering stopped and then clicking another button. After this procedure the remote seemed to work again, until the next time. This happened twice at work so I assumed it must be the proximity to the airport but then it happened outside my house and since then just about anywhere - no airplane needed. One particularly cold morning the remote just seemed totally dead. So I changed the batteries and then needed to use the fudge again to get the car open. Did not work that time and once again the RAC people came out and after several attempts we managed to get the car open (fudge finally kicked in). Since then I have taken the car into the service center in preparation for the drive up to Edinburgh. They said that they changed the batteries in one of the fobs and replaced the other fob. Both worked when I left there but within 3 days the old fob developed a sticky button and I had to remove the batteries (green light came on and I just could not shut it down). That killed any comfort feeling and I could not get a booking at the service center that close to Christmas. The second fob failed in Edinburgh just before we were meant to drive down. We called RAC out again and the guy really battled to get the car opened but the fudge finally worked after about half an hour of trying. Both fobs are now dead - both seem to have problems which is strange. I like the car a lot but this is seriously stressing me out and I really hope I have some good news on Thursday. |
Re: Coupe FOB issue
Hi there
Sorry for the long delay and thanks for the information! Yes, I am afraid when I heard the term fob from Hyundai I assumed that it must be 'FOB' and I capitalised it for a reason I cannot explain - apologies for that. Thanks for the info. I will try to piece together what has been happening for the past four months to try to establish a pattern that I can hopefully present to the Hyundai service center when I take the car in again on Thursday. I am going to be an annoying person who just learnt what a BCM is but wants it checked anyway : ) The brief history I am going to give them is as follows: The first time the RAC came out to help me I could not unlock the car with the key fob. They thought it might have something to do with my working near Heathrow airport - there is constant air traffic. So they showed me how to 'fudge' the remote - holding down two buttons until the flickering stopped and then clicking another button. After this procedure the remote seemed to work again, until the next time. This happened twice at work so I assumed it must be the proximity to the airport but then it happened outside my house and since then just about anywhere - no airplane needed. One particularly cold morning the remote just seemed totally dead. So I changed the batteries and then needed to use the fudge again to get the car open. Did not work that time and once again the RAC people came out and after several attempts we managed to get the car open (fudge finally kicked in). Since then I have taken the car into the service center in preparation for the drive up to Edinburgh. They said that they changed the batteries in one of the fobs and replaced the other fob. Both worked when I left there but within 3 days the old fob developed a sticky button and I had to remove the batteries (green light came on and I just could not shut it down). That killed any comfort feeling and I could not get a booking at the service center that close to Christmas. The second fob failed in Edinburgh just before we were meant to drive down. We called RAC out again and the guy really battled to get the car opened but the fudge finally worked after about half an hour of trying. Both fobs are now dead - both seem to have problems which is strange. I like the car a lot but this is seriously stressing me out and I really hope I have some good news on Thursday. |
Re: Coupe FOB issue
It sounds as if your fobs may be different than those in the U.S. Do you
have a key lock, or must you unlock by transmitter only? As far as interference, it's quite possible. The radio frequencies these systems operate on in the U.S. are actually allocated to military. If we're particularly near a military installation, car remotes, garage door openers, and many items don't work intermittently. In fact, many radio transmissions, if strong enough, can cause interference. Your remotes may be rolling-code type. I don't believe Hyundai uses those in the U.S., but other manufacturers do. It is possible in that case for the transmitter to become unsynchronized with the receiver in the car. The fudge method you describe sounds like the typical method for resynchronization of rolling code transmitters. It sounds to me like the repair facility there is on the right track. If replacing the transmitter or transmitter battery solves the issue, then I suspect the issue was present and clear at the time of servicing. If you indeed have the rolling code type transmitters, then that would significantly reduce the probability of a BCM error causing unsynchronization. In fact, I believe the synchronization is not retained in BCM if battery power is disconnected (presuming your system to be similar to others of the rolling code type I've seen). |
Re: Coupe FOB issue
It sounds as if your fobs may be different than those in the U.S. Do you
have a key lock, or must you unlock by transmitter only? As far as interference, it's quite possible. The radio frequencies these systems operate on in the U.S. are actually allocated to military. If we're particularly near a military installation, car remotes, garage door openers, and many items don't work intermittently. In fact, many radio transmissions, if strong enough, can cause interference. Your remotes may be rolling-code type. I don't believe Hyundai uses those in the U.S., but other manufacturers do. It is possible in that case for the transmitter to become unsynchronized with the receiver in the car. The fudge method you describe sounds like the typical method for resynchronization of rolling code transmitters. It sounds to me like the repair facility there is on the right track. If replacing the transmitter or transmitter battery solves the issue, then I suspect the issue was present and clear at the time of servicing. If you indeed have the rolling code type transmitters, then that would significantly reduce the probability of a BCM error causing unsynchronization. In fact, I believe the synchronization is not retained in BCM if battery power is disconnected (presuming your system to be similar to others of the rolling code type I've seen). |
Re: Coupe FOB issue
The remote disables the alarm and unlocks the doors. Using just the key
I can unlock the doors but not enable the alarm. I read up briefly on this rolling code type alarm and it sounds like a great idea in theory. The problem with the fudge is the remotes don't seem to be up to the job. The buttons stick and they seem to drain the batteries remarkably fast (althought I guess what could be happening is the button is depressed in my coat pocket, sticks and then runs down the batteries that way). If this is a rolling code type of remote I am guessing that the device in the remote that syncs the codes with the matching device attached to the car is not easy to change? I guess what I need to know is what options do I have? Am I just doomed never to use my alarm system again (overly dramatic, maybe : ) |
Re: Coupe FOB issue
The remote disables the alarm and unlocks the doors. Using just the key
I can unlock the doors but not enable the alarm. I read up briefly on this rolling code type alarm and it sounds like a great idea in theory. The problem with the fudge is the remotes don't seem to be up to the job. The buttons stick and they seem to drain the batteries remarkably fast (althought I guess what could be happening is the button is depressed in my coat pocket, sticks and then runs down the batteries that way). If this is a rolling code type of remote I am guessing that the device in the remote that syncs the codes with the matching device attached to the car is not easy to change? I guess what I need to know is what options do I have? Am I just doomed never to use my alarm system again (overly dramatic, maybe : ) |
Re: Coupe FOB issue
If this car is similar to those in the U.S., you may be able to disarm the
alarm using an alternative method as follows: 1. Open the door with the key. In the U.S., the alarm will sound. 2. Get in the vehicle. Turn the key to the "start" position and release to the "on" position (just like you would if you had actually started the vehicle). 3. Wait 30 seconds. The alarm will stop sounding before then, but you must wait 30 seconds. 4. After 30 seconds, try again to start the vehicle. It should start. Also, if you don't lock the vehicle with the remote, the security system will not arm. |
Re: Coupe FOB issue
If this car is similar to those in the U.S., you may be able to disarm the
alarm using an alternative method as follows: 1. Open the door with the key. In the U.S., the alarm will sound. 2. Get in the vehicle. Turn the key to the "start" position and release to the "on" position (just like you would if you had actually started the vehicle). 3. Wait 30 seconds. The alarm will stop sounding before then, but you must wait 30 seconds. 4. After 30 seconds, try again to start the vehicle. It should start. Also, if you don't lock the vehicle with the remote, the security system will not arm. |
Re: Coupe FOB issue
I am ecstatic!! This morning I took my car in for the routine fob
replacement and while I was there I asked about replacing the alarm system. A very helpful man said he would look into it and minutes later they contacted me to say they would be able to do it!! I picked up the coupe this evening with two totally different new fobs and they work and the range has dramatically increased (it now rivals my husbands Smart). Stress testing still needs to be conducted (although I must have tried it about 10 times already today) but they have restored my faith and I am feeling hugely grateful to the center that helped me. I will be writing to them to say as much. And thank you for all the information and for taking the time to explain things to me. It is much appreciated. And for completeness: On your suggestion above one of the guys from the RAC tried it and what happens is that the car starts but then the alarm sounds and then stops after so many seconds and continues in this fashion. I am not sure if you could drive the car as presumably the immobiliser is disabled by the key but the alarm kept sounding. |
Re: Coupe FOB issue
I am ecstatic!! This morning I took my car in for the routine fob
replacement and while I was there I asked about replacing the alarm system. A very helpful man said he would look into it and minutes later they contacted me to say they would be able to do it!! I picked up the coupe this evening with two totally different new fobs and they work and the range has dramatically increased (it now rivals my husbands Smart). Stress testing still needs to be conducted (although I must have tried it about 10 times already today) but they have restored my faith and I am feeling hugely grateful to the center that helped me. I will be writing to them to say as much. And thank you for all the information and for taking the time to explain things to me. It is much appreciated. And for completeness: On your suggestion above one of the guys from the RAC tried it and what happens is that the car starts but then the alarm sounds and then stops after so many seconds and continues in this fashion. I am not sure if you could drive the car as presumably the immobiliser is disabled by the key but the alarm kept sounding. |
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