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Australian Mazda GH 2008 2.5L Manual Sports Luxury
After a year of this happening i have finally decided to give this a go. Its not for everybody but it costs nothing. Trick is to bridge the wires for the door ajar sensor in the problem door. All this will mean is your car wont be able to tell when that door is open. e.g. can lock it when its open and light wont come on if passenger opens it at night. Something im willing to bear.
After a trend started on this forum showing a common issue of the door latches showing ajar so i knew it must be one of them, especially since as the problem became moreefrequent, my door ajar light started coming on whilst driving. I went to a friendly Autoelectrician that gave me the entire electrical manual for my car for free (what a legend) and i knew i had to disable (bridge) the door ajar sensor in each door until it stopped. Below is the diagram for all 4 doors.
View attachment 238576
As per the diagram, the wires that need to be bridged are as follows:
Driver: Black/Blue with Black/Yellow
Front Passenger: Red/Green with Black/Yellow
Rear Right: White/Black with Black
Rear Left: Black/White with Black

I litteraly stuck a stripped end insulated wire into the back of the plug for the two relevant ones.
View attachment 238578
Take the door panel off (youtube) and the plug is at the back near the latch.
Then its a matter of process of elimination, this is my back right door, i bridged the white w/ black stripe and black wires and the door light went off.

Good Luck!
This is old I know but I happen to have the same issue, I also have a battery drain issue which I’ve come to believe is related to the door sensor. But checking the VIN on my car it happens to start with 1YVHZ8B. Do you happen to have a manual related to this vehicle?
Here’s a picture of the plug, if I could get any help pin pointing which cables to bridge that would mean a lot to me.
243055
 

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Hi everyone, In my case the alarm drained car's battery, later I have reset my car by disconnecting battery for sometime(aprox 15mins) & had to change the battery terminal since the wire was badly rusted & was about to fall apart, this has so far resulted in no alarm going off for no reason for last 2 days, I hope this was the only reason, will update you guys in case if it goes off again.
 

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Hi everyone, I've got this same random alarm problem on my 2009 mazda 6 (US/Florida). But I have a different question for you Forscan or OBD2 users: I need to get to the alarm trigger event log and I don't know how to access it. Anyone have a procedure for me to follow? I have Forscan and a $25 OBD Link EX usb adapter, and the two month free Extended License for the hell of it.

Part of me wants to go for the door actuators, but I think it would be extra cool to find the alarm trigger events and see the evidence of which door is the culprit in the logs.

Anyone able to lend a hand on the Forscan question relating to the random alarm problem?
 

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Hi everyone, I've got this same random alarm problem on my 2009 mazda 6 (US/Florida). But I have a different question for you Forscan or OBD2 users: I need to get to the alarm trigger event log and I don't know how to access it. Anyone have a procedure for me to follow? I have Forscan and a $25 OBD Link EX usb adapter, and the two month free Extended License for the hell of it.

Part of me wants to go for the door actuators, but I think it would be extra cool to find the alarm trigger events and see the evidence of which door is the culprit in the logs.

Anyone able to lend a hand on the Forscan question relating to the random alarm problem?
Not sure, ive not delved that far into it, but its pretty powerful. Maybe ask on their forums? Since its basically a Phord underneath, the general concensus is the door strikers get sticky and gum up causing the mechanism to be slow to react and ive seen people on older Lincolns using WD-40 ever so often to clean and "lube" them with good results.
 

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Australian Mazda GH 2008 2.5L Manual Sports Luxury
After a year of this happening i have finally decided to give this a go. Its not for everybody but it costs nothing. Trick is to bridge the wires for the door ajar sensor in the problem door. All this will mean is your car wont be able to tell when that door is open. e.g. can lock it when its open and light wont come on if passenger opens it at night. Something im willing to bear.
After a trend started on this forum showing a common issue of the door latches showing ajar so i knew it must be one of them, especially since as the problem became moreefrequent, my door ajar light started coming on whilst driving. I went to a friendly Autoelectrician that gave me the entire electrical manual for my car for free (what a legend) and i knew i had to disable (bridge) the door ajar sensor in each door until it stopped. Below is the diagram for all 4 doors.
View attachment 238576
As per the diagram, the wires that need to be bridged are as follows:
Driver: Black/Blue with Black/Yellow
Front Passenger: Red/Green with Black/Yellow
Rear Right: White/Black with Black
Rear Left: Black/White with Black

I litteraly stuck a stripped end insulated wire into the back of the plug for the two relevant ones.
View attachment 238578
Take the door panel off (youtube) and the plug is at the back near the latch.
Then its a matter of process of elimination, this is my back right door, i bridged the white w/ black stripe and black wires and the door light went off.

Good Luck!
Thanks for posting!
Complimenting your information with 2009 Mazda6 Rear Door Sensor Bypass. Cheers
Tire Wheel Automotive lighting Automotive tire Hood
Automotive tire Tire Hood Wheel Automotive lighting
Hood Bicycle handlebar Electrical wiring Automotive tire Bicycle part
 

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Wow, thats awesome lol :)
 

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I know this is an old post but wanted to share my solution to alarm (horn) going off sporadically and door open warning light. I disconnected the hood latch sensor and no more horn going off. The only problem is that if you don't use car for a few days it may drain battery. I haven't looked into replacing latch sensor.
 

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I know this is an old post but wanted to share my solution to alarm (horn) going off sporadically and door open warning light. I disconnected the hood latch sensor and no more horn going off. The only problem is that if you don't use car for a few days it may drain battery. I haven't looked into replacing latch sensor.
Great input 🙂. You may find the mazda6 BCM though to be quite fickle. Days , weeks maybe without issue. Then all of a sudden, who the heck is pressing my panic alarm? 😬 Specially sensitive when the outside temp gets hot. The door sensor bypass procedure, shared many years ago now, does simply work. I have no issues on my 2009 after having my horn fuse removed for a couple of years. Now horn fuse is reinstalled resulting in functional horn and no random parking light shows at any given time. The key fob and door handle unlock buttons are still operational and turn cabin lights on, works for me. Just have to be mindful of auto lock feature. BCM thinks the doors are always closed after bypass. Good luck, you can always spring for replacement door latches, if needed, or simply bypass. 🤞Wishing you the best on your hood lamp switch countermeasure. Curious to hear about your time hardened results.
 

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I unfortunately gave in to the dealer and had them try and fix the issue. One door actuator later and $700, which is BS and highway robbery, it still goes of whenever it friggin wants to. I put in a heavy duty battery and did lots of other "DIY fix its" and it still does the same damn thing. Help!!!!!!
 

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I am currently out of town and my wife back at home tells me after two weeks of my car sitting without being ran the panic alarm started going off at random times without her pressing anything. The car did this numerous times so she took it for a drive and noticed that there was no service/ warning lights saying nothing was wrong on the dash display. The car started and ran normally. She says the car was fine for two days after running it then it started again suddenly the alarm going off randomly by itself. She then had a neighbor disconnect the battery since she didn't know what else to do.
I read around the net and think its probably just the intermittent alarm battery in the car which is low.
Anyone have any other ideas ?

I am trying to get a good idea since I am arriving back home this week then the next day I am planning on driving my 6 to Fl for a visit so I'll be short on time .....
I am currently out of town and my wife back at home tells me after two weeks of my car sitting without being ran the panic alarm started going off at random times without her pressing anything. The car did this numerous times so she took it for a drive and noticed that there was no service/ warning lights saying nothing was wrong on the dash display. The car started and ran normally. She says the car was fine for two days after running it then it started again suddenly the alarm going off randomly by itself. She then had a neighbor disconnect the battery since she didn't know what else to do.
I read around the net and think its probably just the intermittent alarm battery in the car which is low.
Anyone have any other ideas ?

I am trying to get a good idea since I am arriving back home this week then the next day I am planning on driving my 6 to Fl for a visit so I'll be short on time .....
Sounds like a weak battery
 

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I unfortunately gave in to the dealer and had them try and fix the issue. One door actuator later and $700, which is BS and highway robbery, it still goes of whenever it friggin wants to. I put in a heavy duty battery and did lots of other "DIY fix its" and it still does the same damn thing. Help!!!!!!
Very frustrating for sure. Maybe you can get your mechanic to bypass instead? I left some detailed pictures on how above. Worked for me. Just don't leave your keys inside your vehicle after closing doors. It automatically locks and you can't use the the door entry button. You'll have to find your second key and physically unlock the door with key..or call AAA. Programmers seem to always leave a gift when you bypass
operation. Not a problem for me it's better than another $2100 😭 to get the other 3 latch sensors replaced. If the problem returns will likely replace BCM. In my case it can't be the latch sensors anymore. Good Luck.
 

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+1 battery. In the time I worked at the dealership, saw 8 of these things come in with this complaint, after about 2 weeks with the first one, we realized that the battery was @ 11.99 volts (should be 12.0-12.1) which technically is a good battery, and that it was putting out like 22 cca less than it needed to. Moral of the story, out of the 8, 7 of them were batteries that were just a touch weaker than the factory battery, and 1 was the module behind the glovebox. My recommendation, spend 140 dollars, buy a duralast gold battery from autozone and install it. It's so far above the recommended cca that you'll never have the issue again. We actually stopped installing mazda batteries in the m6 and started installing the duralast golds because they were the only battery with significantly more juice than necessary and it eliminated the problem.
Do you mean the battery in the key fob? Or a battery located somewhere else?
 

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Do you mean the battery in the key fob? Or a battery located somewhere else?
Considering he is talking about a 12v battery, its the one Mazda cleverly hid under the hood somewhere.
 

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I am currently out of town and my wife back at home tells me after two weeks of my car sitting without being ran the panic alarm started going off at random times without her pressing anything. The car did this numerous times so she took it for a drive and noticed that there was no service/ warning lights saying nothing was wrong on the dash display. The car started and ran normally. She says the car was fine for two days after running it then it started again suddenly the alarm going off randomly by itself. She then had a neighbor disconnect the battery since she didn't know what else to do.
I read around the net and think its probably just the intermittent alarm battery in the car which is low.
Anyone have any other ideas ?

I am trying to get a good idea since I am arriving back home this week then the next day I am planning on driving my 6 to Fl for a visit so I'll be short on time .....
I have found the problem and the fix. My alarm was going off all the time, mostly during times of extreme temp (hot and cold). I read in one forum that someone noted that heat would set their alarm off. My 2004 MDX had the same problem. The issue is the hood latch sensor. Pop the hood, find the sensor behind where the latch is and unplug it. Throws no codes, affects nothing and solves the alarm. Been 4 months now with no alarm. Good luck.
 

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I have found the problem and the fix. My alarm was going off all the time, mostly during times of extreme temp (hot and cold). I read in one forum that someone noted that heat would set their alarm off. My 2004 MDX had the same problem. The issue is the hood latch sensor. Pop the hood, find the sensor behind where the latch is and unplug it. Throws no codes, affects nothing and solves the alarm. Been 4 months now with no alarm. Good luck.
This worked for me as well. Alarm going off when the temp dropped in the middle of the night. Battery tested fine. Disconnecting the hood latch sensor stopped the alarms for 2 months now after going off several times a week for a few weeks. Thanks to everyone for the info!
 

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2013 Mazda 6i Grand Touring - 2.5L I4 Auto
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Consider yourselves lucky, my friends. I tried that "fix" and it didn't work at all. This is a common fault of these cars and a definitive solution has never been found.
 

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I am currently out of town and my wife back at home tells me after two weeks of my car sitting without being run the panic alarm started going off at random times without her pressing anything. The car did this numerous times so she took it for a drive and noticed that there were no service/ warning lights saying nothing was wrong on the dash display.
Tutuapp
The car started and ran normally. She says the car was fine for two days after running it then it started again suddenly the alarm going off randomly by itself. She then had a neighbor disconnect the battery since she didn't know what else to do.

I read around the net and think it's probably just the intermittent alarm battery in the car which is low.

Does anyone have any other ideas?

I am trying to get a good idea since I am arriving back home this week then the next day I am planning on driving my 6 to Fl for a visit so I'll be short on time...
I don't know enough about when the alarm is designed to go off, but I do know that when I unplugged my tail lights and put them back in once the alarm went off.
 

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I don't know enough about when the alarm is designed to go off, but I do know that when I unplugged my tail lights and put them back in once the alarm went off.
Prob saw enough of a voltage drop it thought a door opened. My question is, why was the car locked if you were playing with your taillights?
 
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