Keyless Ignition Issue - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 7 (permalink) Old 04-19-2017, 06:07 PM Thread Starter
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Keyless Ignition Issue

A couple of times now, with the engine running and the key in my pocket, if either of the front doors close with force the red key light on the dash flashes and the car beeps a few times. The light continues to flash for a mile or two after this happens. If I turn the car off, the red key light changes back to green and the car will start normally.

Today when I went to start it, nothing happened. I didn't notice the key light so it must not have been red, but I pushed the button with the clutch all the way down and it didn't do anything. I pushed the button a couple more times, continuing to have the clutch all the way down, then suddenly the car started a few seconds after my last button push.

Is it possible the wireless receiver module has a loose connection? Anyone know where it is on a '14?

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post #2 of 7 (permalink) Old 04-20-2017, 08:34 AM
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Have you ever replaced the battery in your key fob?

From the owner's manual pg 7-32, here are the descriptions for the causes of a red flashing key warning light:

The key battery is dead.
Replace the key battery (page 6‑38).
--------
The key is not within the operation range.
The key is placed in areas inside the
cabin where it is difficult for the key to be
detected.

Bring the key into the operation range
(page 3‑8).
--------
A key from another manufacturer similar to
the key is in the operation range.

Take the key from another manufacturer
similar to the key out of the operation
range.
--------
Without the ignition switched off, the key is
taken out of the cabin, and then all the doors
are closed.

Bring the key back into the cabin.
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post #3 of 7 (permalink) Old 04-20-2017, 10:16 AM Thread Starter
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Battery is fine. It can lock/unlock the doors from a long distance. I also don't know how the front doors being closed would cause the issue if the FOB battery was low.
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post #4 of 7 (permalink) Old 04-20-2017, 10:54 AM
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Got something (like a cell phone) plugged into the center console aux outlet?

If there's a reactive load on that outlet the very small parasitic current that's on it when the car is off can grossly confuse the start module. This is very easily reproduced on my car as I leave a cell charger plugged into there all the time -- if I plug in the PHONE and then hit the clutch I will either get a pulsating start light, no start light at all, the accessories might come on and off (e.g. radio, etc) or similar.

Don't plug the phone in before starting, no problem -- even with the charger plugged in. DO load it and there's trouble.

I thought I had an electrical gremlin in my car (very bad if it happens!) but as it turns out, nope -- it's interference from user-supplied electronics, and once I figured out what was going on it was easy to avoid the scenario that caused it.
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post #5 of 7 (permalink) Old 04-20-2017, 11:04 AM
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Quote:
Originally Posted by tickerguy View Post
Got something (like a cell phone) plugged into the center console aux outlet?

If there's a reactive load on that outlet the very small parasitic current that's on it when the car is off can grossly confuse the start module. This is very easily reproduced on my car as I leave a cell charger plugged into there all the time -- if I plug in the PHONE and then hit the clutch I will either get a pulsating start light, no start light at all, the accessories might come on and off (e.g. radio, etc) or similar.

Don't plug the phone in before starting, no problem -- even with the charger plugged in. DO load it and there's trouble.

I thought I had an electrical gremlin in my car (very bad if it happens!) but as it turns out, nope -- it's interference from user-supplied electronics, and once I figured out what was going on it was easy to avoid the scenario that caused it.
Wow, that's a VERY specific and odd problem....Can't say I've ever tried starting the car with the phone plugged into AUX though....Something to test out on the ATX.

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post #6 of 7 (permalink) Old 04-20-2017, 05:41 PM
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Yep. Note that the forward acc socket is OFF when the ignition is off normally. The (tiny) amount of current available there due to what appears to be electronic switching of that socket is what causes it. The phone does not charge when the ignition is off, but if it's plugged in the freak-out of the start system happens 100% of the time. Unplug it, all is normal. Plug in the phone after starting the car or with the ignition on (that is, acc jack is powered), no problem.
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post #7 of 7 (permalink) Old 04-20-2017, 10:12 PM Thread Starter
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Nothing plugged in anywhere. To rule out a key issue, I'm using my spare for a few days to see if the problem comes back.
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