Horn Honks when I start car [Archive] - Drive Accord Honda Forums

: Horn Honks when I start car


olemissfan76
05-20-2010, 07:17 PM
It is very annoying and seems completely random and is tied to the keyless entry system.

My fob has lock/unlock/panic/trunk unlock buttons.

Ill lock it with the fob when I leave the car and unlock it also with the fob before entering.

But almost every since time I put the key in the ignition, turn it to start it, then the horn gives me 2 quick honks before it starts.

It cannot be because it was triggered because It has occured when I was standing out near the car and got back in it.

What can be done to stop this?

It is embarrasing to be in a shopping mall or in my neighborhood and everytime I get in my car to take off, the car sounds off too

Inline4NoNavi
05-20-2010, 07:19 PM
It is very annoying and seems completely random and is tied to the keyless entry system.

My fob has lock/unlock/panic/trunk unlock buttons.

Ill lock it with the fob when I leave the car and unlock it also with the fob before entering.

But almost every since time I put the key in the ignition, turn it to start it, then the horn gives me 2 quick honks before it starts.

It cannot be because it was triggered because It has occured when I was standing out near the car and got back in it.

What can be done to stop this?

It is embarrasing to be in a shopping mall or in my neighborhood and everytime I get in my car to take off, the car sounds off too

did u put in a aftermarket alarm or starter? if so bring it back lol dont bring it to honda unless honda installed it

olemissfan76
05-20-2010, 07:31 PM
No, it is OEM honda. Says so on the fob.

fastball
05-20-2010, 07:48 PM
We can help you if we all start from square one so we have some more information to go by:

1. What is the year and trim level of your car? (i.e. 2008 Accord EX 4 cylinder sedan, 2009 EX-L V6 coupe, etc.)

2. Transmission - is it an auto or manual?

3. Did you buy new or used?

4. If bought new, did you have the dealer install ANYTHING AT ALL?

5. If bought used, did the previous owner install ANYTHING AT ALL?

6. How long has this been going on - just started, happened since you bought it, etc.

olemissfan76
05-20-2010, 08:10 PM
Good call. Here is some helpful information

1. What is the year and trim level of your car? (i.e. 2008 Accord EX 4 cylinder sedan, 2009 EX-L V6 coupe, etc.)

2008 Accord EX 4 cyl coupe, 5 speed

2. Transmission - is it an auto or manual? manual

3. Did you buy new or used? bought used

4. If bought new, did you have the dealer install ANYTHING AT ALL?

5. If bought used, did the previous owner install ANYTHING AT ALL?
Not that I am aware of. Stock stereo, cloth interior. Honda key fob. 35k miles. It seems in pristine condition. I have owned it for 3-4 months now.


6. How long has this been going on - just started, happened since you bought it, etc.
This has been occurring since I bought the car. I purchased it from a dealership.

If I cannot solve the issue here, I may end up taking it to a dealer and paying a service fee, but that is why I am here, to avoid the service fee and do it myself.

Hopefully, I can get some ideas.

olemissfan76
05-20-2010, 08:36 PM
It honks twice, btw, really quick and short, like the road runner: beep beep!
lol

fastball
05-21-2010, 04:33 AM
You're still under the factory warranty period and there are no aftermarket modifications, so just take it to any Honda dealer and have them diagnose it. It's under warranty so no charge. Problem solved :thmsup:



Just be sure to do this before the 36,000 mile mark :yes:

dg7
05-21-2010, 04:38 AM
Since the FOB is the key could you be depressing the panic button when you start?

Honda247
05-21-2010, 06:34 AM
Since the FOB is the key could you be depressing the panic button when you start?

Don't think the buttons on the key fob work once the key in in the ignition. OP by any chance do you see anything indication an aftermarket alarm, like a sticker that says CARR, or is there anything different inside your car like a out of place LED that blinks when you lock your car?

turbodave
05-21-2010, 07:19 AM
Still sounds like an aftermarket/Honda installed alarm fault. Many/most aftermarket/OEM sponsored (dealer installed) alarms can/do operate using the OEM fob.

olemissfan76
05-21-2010, 05:25 PM
I have no reason to believe this is aftermarket.

I have never heard of an aftermarket using a stock fob,

however, if you guys will let me know the location of the factory alarm brain, I will check it to make sure it is unplugged.

Even the battery harnesses are stock and have no extra wires going to them. The door pins are also stock.

I think you are assuming a little too much given the information I have provided.

Why not just assume its factory with an issue?

I have almost 40k miles now given todays odometer, sorry for the discrepancy.
My factory warranty turned off at 36k according to the dealer.
I would have to pay. No worries, I will if I have too.

fastball
05-21-2010, 06:19 PM
When you lock the doors, do you have a flashing LED in your tachometer? Look inside at your tach after you lock the doors with the remote.

If you have the EX with leather it should have the factory security system, which would have a flashing LED in the tach after you lock the doors. If your EX is a cloth EX, I don't think it has a factory alarm - just remote locking.

Seeing as the horn and pretty much everything goes through what are called the ICU or Interior Control Unit, of which there are two, don't bother trying to look for them or disconnecting things. I've had the steering column and dash under the driver's side appart to install the Honda interior illumination kit in my car, and there are so many harnesses if you don't pay attention you can do bad juju to your car.

olemissfan76
05-21-2010, 06:46 PM
I have the EX with cloth interior. I really wanted leather, I may install it at a later date.

I will still look at my tach for the light though, Ill post here later.

xJoeMama78
05-21-2010, 08:59 PM
I have no reason to believe this is aftermarket.

I have never heard of an aftermarket using a stock fob,

however, if you guys will let me know the location of the factory alarm brain, I will check it to make sure it is unplugged.

Even the battery harnesses are stock and have no extra wires going to them. The door pins are also stock.

I think you are assuming a little too much given the information I have provided.

Why not just assume its factory with an issue?

I have almost 40k miles now given todays odometer, sorry for the discrepancy.
My factory warranty turned off at 36k according to the dealer.
I would have to pay. No worries, I will if I have too.

People are assuming it's an aftermarket alarm because that is how it is behaving. Since keyless entry became standard most dealerships install alarms that are controllable by the factory key fob. The alarms are usually installed on every car on the lot.

olemissfan76
05-22-2010, 06:20 AM
I also see nothing to tell me it is behaving like an after market alarm. It just seems to be behaving like an alarm or keyless entry system that is stuck in some mode I am not familiar with. There is nothing there to point anyone toward an after market alarm.

Yet again, you are assuming too much given the information I have put forward.

Trip
05-22-2010, 07:01 AM
For the hell of it, try disconnecting the battery for a few minutes (pull the negative cable).

I've heard of other electronic hiccups being fixed by a soft reboot. If this is an OEM Honda issue, it sounds like an ECU somewhere is glitchy. This might cure it.

Be sure you have radio codes written down if you have an anti-theft stereo.

xJoeMama78
05-22-2010, 07:57 AM
I also see nothing to tell me it is behaving like an after market alarm. It just seems to be behaving like an alarm or keyless entry system that is stuck in some mode I am not familiar with. There is nothing there to point anyone toward an after market alarm.

Yet again, you are assuming too much given the information I have put forward.

If you are so sure it's an issue with the factory security system and not a dealer installed alarm then take it to any Honda dealer and have them fix it. You asked for our advice and we tried to give it to you. Since you obviously know more than those of us who have experienced similar issues, even though you didn't know an aftermarket alarm could be controlled by a factory key fob, you should be able to figure it out yourself.

olemissfan76
05-22-2010, 08:06 AM
I am not going to get into a pissing match over this question. I will get back with a previous poster and their question.

I am asking here because I want to attempt to fix it myself and not pay the dealer fee. You are inferring it is an after market problem, I am telling you it is not. Period.

If you have advice to give, then give it, related to the information I am giving you. Yet again, you are inferring or at least assuming, and coming off like someone who does assume. No here has volunteered that they have experienced a similar issue, so yet again, you are assuming that.

If you have nothing more valuable to contribute to this thread, please move on and pic another newbie here to pick on. I am not worth your time.

olemissfan76
05-22-2010, 08:06 AM
For the hell of it, try disconnecting the battery for a few minutes (pull the negative cable).

I've heard of other electronic hiccups being fixed by a soft reboot. If this is an OEM Honda issue, it sounds like an ECU somewhere is glitchy. This might cure it.

Be sure you have radio codes written down if you have an anti-theft stereo.

Good call! I will try that today. Thanks for the suggestion :thmsup:

xJoeMama78
05-22-2010, 08:18 AM
I am not going to get into a pissing match over this question. I will get back with a previous poster and their question.

I am asking here because I want to attempt to fix it myself and not pay the dealer fee. You are inferring it is an after market problem, I am telling you it is not. Period.

If you have advice to give, then give it, related to the information I am giving you. Yet again, you are inferring or at least assuming, and coming off like someone who does assume. No here has volunteered that they have experienced a similar issue, so yet again, you are assuming that.

If you have nothing more valuable to contribute to this thread, please move on and pic another newbie here to pick on. I am not worth your time.

My 8th gen Accord had a dealer installed alarm (that I didn't pay for but wasn't removed) that did the same thing. It was controlled by the factory key fob. Occasionally the shock sensor would act up, not set off the alarm, but when I started the car the horn would honk to let me know the shock sensor was activated. I took it to the dealer who disabled the alarm and the issue stopped.

My car had no external LEDs, no extra remotes, no alarm siren as it used the horn, and no way to tell there was an aftermarket alarm unless you looked up under the dash and noticed the very small alarm brain tucked pretty far up in the dash. There was not even a valet switch, you activated valet mode by some combo of turning the key on and off.

I told you people here experienced similar issues, you assumed it wasn't me. I can't physically see up inside your dashboard but I can tell you don't know that much about modern dealer installed alarms which is why I told you that most dealer alarms are now controlled by the factory key fob. I wasn't picking on the new guy, I was trying to help you. Have you looked up under your dash for an alarm brain or are you just assuming there isn't one because there is no external LED or switch and no extra remote?

olemissfan76
05-22-2010, 08:47 AM
Thank you for your reply. I appreciate your advice. I apologize that we got off on the wrong foot.

Ill be applying yours and the above mods advice this afternoon.

I am really good about following up so I will let you guys know what I have discovered :)

turbodave
05-22-2010, 01:38 PM
I also see nothing to tell me it is behaving like an after market alarm. It just seems to be behaving like an alarm or keyless entry system that is stuck in some mode I am not familiar with. There is nothing there to point anyone toward an after market alarm.

Yet again, you are assuming too much given the information I have put forward.

Just because you haven't seen a clean aftermarket alarm install doesn't mean they don't exist. I can show you my Ford Excursion with an aftermarket alarm installed. No extra wires to the battery, uses stock door plungers, everything. Unless you dug into and under the dash you'd be hard pressed to know it's there. Oh, and yes, it uses the factory fobs. Same with my previous two cars before that.
Just because you haven't seen such setups doesn't mean they don't exist.

rfs830
05-22-2010, 02:48 PM
xJoemama76 - would you happen to know the brand name of your system. I never really though about looking at the oem upgrade aftermarket kits as I was thinking about getting a viper system installed.

Its sad that when you give someone some advice just to check something out the turn around and get angry just because they did not know about something. wow....

turbodave
05-22-2010, 03:11 PM
There's no anger what-so-ever. I was just trying to point out that there are other ways to install OEM/aftermarkets other than cobled wires and add on sensors, etc.

olemissfan76
05-22-2010, 09:48 PM
I believe you all. I don't doubt there are plug and play after markets that use a factory reprogramable fob. I am just saying I highly doubt given what I have seen of this car that is the case.

Nonetheless, I have made a discovery.

There is a blinking light on my tach once I enable the system. I noticed when I open the door (alarm disabled) there is a yellow/orange blinking light on my factory system. When I engage the alarm, that is when the orange light blinks on the tachometer.

If I sit in the car and arm the system, then I put my key in the ignition and the horn does not honk.

Tomorrow I will try disconnecting the negative ground cable from the battery and see what happens after I hook it back up.

jagboy
05-23-2010, 12:52 AM
take a pic and post it of under the dash(remove the driver side knee panel) and maybe we can spot anything out of the ordinary/maybe an aftermarket alarm?

btw its sounds like you have a KARR alarm which is a dealer installed alarm :

http://www.crvownersclub.com/forums/showthread.php?p=37655
"I have an '07 EX, and on starting the horn will beep a few quick beeps when the key is turned on."....."Turns out it was the alarm, it was a dealer installed Karr alarm."

turbodave
05-23-2010, 03:57 AM
take a pic and post it of under the dash(remove the driver side knee panel) and maybe we can spot anything out of the ordinary/maybe an aftermarket alarm?

btw its sounds like you have a KARR alarm which is a dealer installed alarm :

http://www.crvownersclub.com/forums/showthread.php?p=37655
"I have an '07 EX, and on starting the horn will beep a few quick beeps when the key is turned on."....."Turns out it was the alarm, it was a dealer installed Karr alarm."

That's what I've been trying to hint about all along. I sorta had it in the back of my mind that it may be a KARR system. They sometimes do the "key-on beeps" when there's a fault.
The dealer installed systems in my Ford and other previous cars have been KARR systems. I've never had one fail though, so I wasn't entirely sure how then acted when they do. I was sure however that the factory installed system didn't act like this (could be wrong though).
BTW, if the dealer's installer was real good it could be very difficult even finding any evidence of it being there. Certainly no underhood indications.

olemissfan76
05-23-2010, 07:03 AM
ok, can do. Its super hot here today and I have some yard stuff to do.
Ill post a pic this evening.
Im also going to try and do the ground wire unplug to see if that will reset it.

olemissfan76
05-24-2010, 10:16 AM
ok, some disappontment:

I took off the negative cable from my battery for about 10 minutes. That didn't work unfortunately. I was really hoping for that one.

I don't see any stickers that say Karr or Carr on them for the alarm.

My flash on my camera is non-existant so I cannot take any pics underneath the


I guess I am going to have to bite the bullet and go to the dealer at some point.

But yea, its every time I put the key in the ignition and turn the key that the horn beeps 2-3 times very quickly.

What ever the position is before you activate the starter is when it does it. The position you would have it in if all you wanted to do is listen to the radio.


I had trouble with a honda alarm in my previous car. Had to replace the brain.

I wonder if I am seeing a trend here?

turbodave
05-24-2010, 10:23 AM
ok, some disappontment:

I took off the negative cable from my battery for about 10 minutes. That didn't work unfortunately. I was really hoping for that one.

I don't see any stickers that say Karr or Carr on them for the alarm.

My flash on my camera is non-existant so I cannot take any pics underneath the


I guess I am going to have to bite the bullet and go to the dealer at some point.

But yea, its every time I put the key in the ignition and turn the key that the horn beeps 2-3 times very quickly.

What ever the position is before you activate the starter is when it does it. The position you would have it in if all you wanted to do is listen to the radio.


I had trouble with a honda alarm in my previous car. Had to replace the brain.

I wonder if I am seeing a trend here?

The 3 quick honks on my KARR system indicate a sensor fault or it has been tripped.

BTW you should not be able to find any KARR stickers if it's been installed properly.

olemissfan76
05-24-2010, 10:25 AM
Hmmm. That's too bad. I can sit in my car. Lock the doors with the fob. Unlock the doors then insert my key and turn it and get the same result every time.

I hope it is not going to be too much to fix.

****s for my wallet.

CharlieHustle
06-23-2010, 05:59 PM
If you haven't already fixed this problem or for those who may experience the same instance with their Factory Alarm, check for an unplugged connector at the Valet/Blinking LED light module. This is located at the lower part of the under dash panel on the drivers side of the car. If you see a small 3 prong connector hanging freely, or feel no wires connected to the back of this module, thats whats causing your horn to honk 4 times rapidly when you start your car.

For Clarification, the Factory Alarm add-on is in fact a KARR alarm system.

Unfortunately, some dealerships have the worst techs installing these add on units. They're so simple that there should be no problem taking the time to route wires neatly and not make it look like a spaghetti factory under the dash. I've only seen a handful that were installed seamlessly into the car. Most I can yank the module from under the dash without taking apart more than one panel and without tools. Thats unacceptable for what the dealer charges for the option.

olemissfan76
08-26-2010, 04:25 PM
Just an update: I have not gone to the dealer yet. Other things came up and this is something I've just been trying to ignore.

I finally do have some time and hope to get her to the dealer in the next few weeks.

I am very eager to find out what it could be but they charge $104.00 to even diagnose this issue they told me. If they need to replace the unit, Ill ask them to just show me where it is and purchase one and install it myself.

If there is a bad sensor, they can just go ahead and replace it.

Ill let everyone know the conclusion :wave:

olemissfan76
08-26-2010, 04:26 PM
To the above poster: My LED does flash red, its a light on the tach gauge.

I checked underneath and no disconnected wires :(

I was hoping though :thmsup:

jhv357
08-26-2010, 04:46 PM
I installed a enhanced alarm system on my accord and i kept my key and all the factory controls but i use my Honda key.

jagboy
08-26-2010, 04:56 PM
Just an update: I have not gone to the dealer yet. Other things came up and this is something I've just been trying to ignore.

I finally do have some time and hope to get her to the dealer in the next few weeks.

I am very eager to find out what it could be but they charge $104.00 to even diagnose this issue they told me. If they need to replace the unit, Ill ask them to just show me where it is and purchase one and install it myself.

If there is a bad sensor, they can just go ahead and replace it.

Ill let everyone know the conclusion :wave:

Why not try another dealer that might do it for cheaper or maybe for free?

olemissfan76
09-17-2010, 10:30 AM
alright. some finality.

I have 2 dealers here. My car is out of warranty. I had an issue with my gas tank leaking (I ran over something) so when I took the car there, I asked them to diagnose the alarm as well.

The technicians had not seen this issue before with an alarm and everyone thought it was funny.

They cleared my security codes, took off the positive terminal and let it sit for a day or so, then after reconnecting, the alarm no longer honks.

They think clearing the codes is what it took to fix it.

They told me, which I confirmed with the parts department that this factory installed alarm has no independent control module.

It connects to something called a multiplexer which many other things connect to and I would have to replace that whole unit, which is very expensive just to replace the brains of this alarm.
They said the dealer installed alarms do have an indept control module, obviously, but the ones from the factory are all tied in together.

So, clearing the codes finally worked on mine.


Just wanted to conclude my thread in case anyone else has this problem down the road.