Last post on Oct 29, 2013 at 5:49 AM
You are in the Mazda CX-9
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Mazda CX-9, Electrical, SUV
#1 of 51 Mazda CX-9 Keyless Entry (card) problems
May 13, 2009 (2:08 pm)
Recently my 2007 CX-9, luxury package AWD which I bought new, began having problems with the keyless card and is totally unreliable as it does not always (70% of the time) open or close the doors or even start the engine.The dealer ordered two new sets of cards, had them reprogrammed but to no avail. I have tried with new batteries also. The dealer is consulting with Mazda tech but has had no answer from them yet after two weeks waiting. In the meantime I use the metal key to get around. The dealer initially thought there could be interference coming from my cell phone but that has been disproved.
#2 of 51 Re: Mazda CX-9 Keyless Entry (card) problems [prd3]
May 13, 2009 (10:32 pm)
In my view, debugging this is not that difficult.
First, there is a central unit. Second, there are several sensors in doors, hatch and ceiling. Third, the fob. It seems to me, the fob is not the problem ('cause your dealer has changed that.). To rule out the sensors, try to unlock from both front doors and the hatch. Do they all have the same problem? If yes, then the central unit needs to be replaced. If no, one of the sensors is bad. According to your description, "open or close the doors or even start", it seems that the chance of multiple sensor failure simultaneously is very small. Therefore, I am betting on the central unit. Dealer has the workshop manual to diagnose the issue, step by step. Mazda provides a very thorough procedure for debugging SmartKey. I think your dealer is a bit on the lazy side. If I were you, I would go to another dealer if another one is closeby.
Cell phone is known to interfere with SmartKey. It is not a myth. Certain places also have strong interence (such as radio stations, airport, etc.) Your SmartKey may behave strangely. However, this does not seem to apply to you.
#3 of 51 Re: Mazda CX-9 Keyless Entry (card) problems [prd3]
May 14, 2009 (12:40 pm)
The workshop manual contains a simple procedure to diagnose SmartKey problem. Here is the procedure:
- Turn the ignition to ON position
- Verify the security light (the red key-shape light between the round meters)
- If there is any malfunction
> After any malfunction is detected, the security light will function as follow for approx. 1 minute
<> DTC 16 and lower (error code): Flashes
<> DTC 21 and higher: Illuminated
- If there is no malfunction
> The security light illuminates for approx 3 seconds and goes out
So, please follow the procedure to see if there is any malfunction that the system self-detects. If yes, there is another table showing the flash patterns (like Morse codes) and their corresponding problems.
Here is a list. Legend: P means a flash. S means no flash.
PSPSSSSSS -> No detected communication with coil antenna
PSPPSSSSS -> Coil malfunction
PSPPPSSSS -> key ID data cannot be read/key ID registration error
PSPPPPSSS -> keyless control module cannot read key ID number data normally
PSPPPPPSS -> keyless control module has detected unregistered key ID number
PSPPPPPPS -> communication error between keyless control module and the PCM (mismatched conditions)
PPSPSSSSS -> only one key ID number is registered
PPSPPSSSS -> communication error between keyless control module and the PCM (data transfer error)
PPSPPPSSS -> ID number data in the PCM and the keyless control module do not match
-> keyless control module malfunction
Hope this helps you.
#4 of 51 Re: Mazda CX-9 Keyless Entry (card) problems [ceric]
May 14, 2009 (9:16 pm)
I apologize for not responding sooner but have been busy.Didn't want you to think I have been ignoring you. I will follow your recommended steps and get back to you. In the meantime have a pleasnt weekend.
#5 of 51 Re: Mazda CX-9 Keyless Entry (card) problems [ceric]
May 15, 2009 (9:47 am)
Good morning Ceric. I checked the security light as per your instructions and found no malfunction when turn the ignition to the ON position. The security light illuminated for 3 secs and then went out. I had the keyless entry card with me at all times when checking this out. I also tried opening and closing the hatch and front doors as you suggested and encountered no problems. also tried the sunroof.
By the way what is the "fob" ?
#6 of 51 Re: Mazda CX-9 Keyless Entry (card) problems [prd3]
May 15, 2009 (2:17 pm)
"fob" is another term for remote control unit. In this case, the key card.
So, if all doors and hatch behave similarly and there is no abnormal flashing of the dash light, it leaves with two possibilities
- Keyless Control Module & Coil Antenna.
Anyway, this what the workshop manual suggests. Dealer would probably have to replace either of the two and try. Replacing the KCM is more troublesome since one needs to reprogram all the keycards. If I were the mechanic, I would probably try the Coil Antenna first.
#7 of 51 Re: Mazda CX-9 Keyless Entry (card) problems [ceric]
May 20, 2009 (9:11 am)
Thanks again. I am still waiting for my dealer to get back to me. He says they are stumped and are awaiting directions from MAZDA main office in Toronto.
#8 of 51 Re: Mazda CX-9 Keyless Entry (card) problems [prd3]
Jun 12, 2009 (1:48 pm)
Well I am back with two new keyless cards (supplied by the dealer) which seem to be working so far. They were never able to clarify the problem for me and they acknowledged they were stumped. However, while I was waiting for the new cards to arrive I experimented with my old ones making sure they were not in close contact with any metal objects and wireless transmissions (coins, keys, pocket knives cell phones etc). Well this seemed to make the trick because the card started working normally again without a hitch. So I am following this practice with the new cards and keeping them separate. I believe that having them on a key chain is asking for trouble in the long run because the problem doesn't manifest itself right away. The troubleshooting section for the keyless card in the manual does mention the possibility of interference from metal objects and the such. One of these days I will pick up enough courage to confirm my observations and put the card back on a key chain.
Thanks for your help
#9 of 51 Re: Mazda CX-9 Keyless Entry (card) problems [prd3]
Jun 12, 2009 (2:23 pm)
So, you got two brand new keycards from dealers under warranty, correct?
I knew that SmartKey interferes with cell phones and have troubles working in high EMF areas (such as near airports or radio stations). I have no trouble with my SmartKey on keychains. Metals may cause EMF bounce and may attenuate the signal a bit. However, I don't think there are enough area of metal to completely block the EMF from reaching your car's sensors. Interferences from cell phones is, however, not a myth. It has been reported frequently.
I have SmartKey on my 2005 Prius as well. You can say that I have been using this technology since end of 2004 w/o issues.
For me, I keep on cell on my belt, and keychain in the pocket. No problem of interference.
#10 of 51 Re: Mazda CX-9 Keyless Entry (card) problems [ceric]
Jun 12, 2009 (3:27 pm)
Thanks for your prompt reply. You are correct I got them under warranty. Yes you are right about the area of keys etc on a chain being too small to block emf from the card. However the card EMF could be generating spurious fields on the keys over time that would eventually partially interfere with the card field????????????