Security light on. Car won't start

Asked by Jaaz182 Nov 07, 2015 at 01:52 PM about the 2004 Mazda MAZDA6 4 Dr s Wagon

Question type: Maintenance & Repair

I approach the car to open. Fob does not unlock or lock or stat the alarm. I
have to unlock the car by placing key in door. The security light is on. Placing
the key in the ignition causes it to flash and click rapidly. Car won't start.
Dashboard is largely dark with a few warning lights on. I am thinking the
battery is very dead? But is it also something more since the car doesn't seem
to be recognizing any of my fobs?

15 Answers


Replace the battery in the fob and try it again.

9 people found this helpful.

It’s a chip just to the side of the key hinge. Either re-use this piece or very carefully remove chip and fit into new key. Must be a manufacturers secret as even the garages seem to fob over it. See photo.

5 people found this helpful.

If your key won’t open the doors you can reset the fob. 1. Open drivers door 2. Turn ignition on and off three times 3. Close and open drivers door three times 4. Press button on key fob twice 4.5 If you have a second key press a butto twice on that one as well 5. Turn ignition on and off All should then be reset

6 people found this helpful.

Glynno, I’m confused about this chip u are saying that’s in the column to take it out and put in the fob?? Can u explain a little

2 people found this helpful.

Hi Wisetech84, the chip is in the keyfob. After you take the pcb out you eed to find the chip. Its small piece that looks like carbon. It is aside the key part of the fob so you need to split the key part and you will find it tucked awayin here. Be very carefull withit as it is fragile. Maybe it would be best to cut it outof the plastic.

6 people found this helpful.

Oh the part is not in the column its in the key fob.

2 people found this helpful.

Glynno, thank you for your response. I did end up reading your comment again and realized that I misread it. But thank you again for responding.

1 people found this helpful.

glynno - What button do you push on the fob when going through the reset process? Nothing seems to work. While I can start my car without issue now I can't lock it. My husband even tried disconnecting the car battery in an attempt to reset the system.

2 people found this helpful.

could be the battery in the fob. check that the red light is flashing when you press the lock button.

1 people found this helpful.

press the lock button when resetting the fob.


What if you lost the key fob? Is there a way to just disarm the alarm at all?

6 people found this helpful.

How do I reset alarm on a 2004 Mazda 6 I don’t have a button forbit

1 people found this helpful.

if you have lost the key fob completely then I think you would need to buy from Mazda as you have also lost the chip. Could be a lot more expensive than a fob off the internet.

Why does a immobilizer system in a 2016 Mazda CX-5 works sometimes and not sometimes? Sometimes a key must be used... other times it works just fine?

Glynno plz post a pic of we’re it’s at and we’re to cut

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