Question about Mazda MAZDA6

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Neither key fob for our mazda 6 unlocks the car. A red light flashes on the fob, so I'm not sure it's the battery. Is there some way to reset the system so the fob works?

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All you have to do to reset the coding is hold the lock button down for a minute or two till the locks click locked. then test it again by unlocking them. if the button light flashes rapidly then the batt is low, which will affect the distance for use. (do the re-code right next to the vehicle for best results.)

Posted on Dec 31, 2010

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Mazda 6 Sport.recently changed batteries & Key doesn't always work;car start,open or lock doors. Red key light sometimes comes on? Any ideas?


use a scan tool to reset the ECM program as the battery removal may have corrupted the CPU program for all that you mention
if you changed the fob key battery ,it may be necessary to reprogram the key to the immobilizer.

Sep 06, 2015 | Mazda Cars & Trucks

1 Answer

I have a 2007 ES 350. Changed key fob battery,now nothing works. Only immobilizer security light is flashing and engine start stop button has amber colored light on


Be sure to use the correct battery, properly in place, clean the key contacts , See owner's manual for additional information.
There are specialized locksmiths for car keys

Oct 02, 2014 | 2007 Lexus ES 350

1 Answer

I have a key symbol light come on on the dashboard and the car wont start now, please help, what dos it mean?


This is your security or anti-theft light. Check your owners manual first, but I have reset them on other cars by unhooking the negative battery cable for a minute or two, then using the key fob to lock and unlock the doors a couple of times. I believe your car has a microchip in the key, so make sure nobody tried to start it with a hardware store copy.

Mar 14, 2011 | 2004 Mazda 6

1 Answer

WONT START.SECURITY LIGHT FLASHES WHEN TRYYING TO START


Anti Theft System - inmobilizer is actovated. Need disarm to start engine. Have you another key and fob? Try lock/unlock cycle with new key + fob. Your key may be corrupted.

Try also just unlocking the car with the key (not the fob) as soon as you unlock the door put the key in the ignition immediately and see if the car starts.

If you have your radio code it may be worth trying a total reset (leave the car unlocked) disconnect the battery and leave for 20 mins. then reconnect.

Hope help with this.

May 05, 2010 | 2000 Jaguar S-Type

1 Answer

Need to reset the key fob after replacing the battery


You should not have to reset the key fob after a battery replacement. The signal from the key fob stays the same and is programed to the reciever.
If the key fob needs to be reprogrammed then follow these steps.
1. Have all key fobs with you during programming.
2. Sit in the vehicle with all doors closed.
3. Lock all doors using the Lock/Unlock switch on the door.
4. Insert and withdraw the ignition key 7 to 9 times within 10 seconds (do not turn the key, just insert and withdraw).
5. The 4 way flasher indicator on the dash should flash once or twice.
6. Insert the ignition key and turn it on (key on, engine off).
7. Press any button on one remote and the 4 way flasher indicator on the dash should flash once.
8. If you have more key fobs to program use the Lock/Unlock button on the door to unlock the doors and then lock the doors.
9. Press any button on the next key fob and the 4 way flasher indicator on the dash should flash once.
10. Repeat if you have more key fobs. Only 5 can be programmed.
11. To exit, simply turn of the igniton and remove the ignition key.
12. Unlock the doors using the Lock/Unlock switch on the door and exit the vehicle.
13. Make sure the window is down when testing remotes in case you leave the keys inside.
14. Close all doors and test all remotes that were programmed.

Do not skip any steps or the process will not work.

If the 4 way flasher indicator does not work when inserting the key, you will need to start the process from the begining. If it still does not work the receiver may be your problem.

If the 4 way flasher indicator does not flash when pressing any button on the key fob then the key fob is the problem (dead battery or defective remote)

Dec 18, 2009 | 2002 Nissan Xterra

1 Answer

200 jag stype no start anti-theft light flashing


Have you another key and fob ?

Try lock/unlock cycle with new key + fob. Your key may be corrupted.

Try also just unlocking the car with the key (not the fob) as soon as you unlock the door put the key in the ignition immediately and see if the car starts.

If you have your radio code it may be worth trying a total reset (leave the car unlocked) disconnect the battery and leave for 20 mins. then reconnect, most systems will then reboot and this MAY help?
Failing all the above it looks like dealer time - more ££ss

good luck !

Oct 28, 2009 | 2003 Jaguar S-Type

1 Answer

First: alarm went off on its own.(mazda 6 2003). Now when locking and unlocking car sometimes indicators flash and sometimes not. Now red immobaliser light is flashing on dash when driving, then stops...


there is often a small back up battery in the immobiliser unit itself, if you can locate this unit and replace the battery with the ignition on / engine running, then it should not need recoding and work fine after that. The other thing that could be wrong is the key battery (if the fob has one) or the transponder chip in the key head. If the key signal is low the immobiliser lamp will light during driving, but this does not explain the alarm going off. That is more likely either a poor vehicle battery, alarm / immobiliser back up battery, or another electrical fault such as water leakage into a tail-light or even the alarm unit itself when it rains. A lot of alarms are voltage sensing and when the vehicle is parked they will alarm if the battery voltage changes for any reason, though not during driving so the battery in the immob is my first choice to look at.

Oct 24, 2009 | 2003 Mazda Mazda6

1 Answer

Won't start after cleaning battery terminals


Sounds like you have an aftermarket alarm with starter disable. By disconnecting the battery the alarm reset and the defualt setting is usually to set the alarm automatically (active arming). You have three options..
A. If you have the key fob that went with the alarm you can disarm the alarm.
B. If no key fob is available you can disconnect the battery again, turn the ignition key to the on position and reconnect the battery. This usually doesn't allow the alarm to set and allows the car to start.
C. Remove the aftermarket alarm system. This is usually the long term fix i recommend if the fob isn't available. Option B should get you going though.

May 09, 2009 | 1993 Toyota Corolla

1 Answer

Possibly battery-related problem with '02 Mazda Protege


It sounds like the car's security system is going off. Is there a key fob to lock/unlock doors and turn on alarm? If there is, connect battery, and immediately press alarm/unlock button to turn alarm off.
I have a truck with an aftermarket alarm system installed by the previous owner, my battery died, and when I hooked up a new one the alarm went off, and it took a while before I hit the key fob button, but it stopped it. Let me know if this works for u.

Nov 19, 2008 | 2002 Mazda Protege

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