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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 10-31-2013, 10:00 AM   #1
biglittledog
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Location: Boulder, Colorado
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My Ride: 2002 325xiT
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weird diamond key fob double problem

My car has two diamond key fob remotes and neither will lock the car with the center button but the other two buttons will unlock and open the tailgate glass (remember it's an xiT wagon) normally.

I've charged both with some long drives but never gotten the center button with the BMW logo to do anything on BOTH keys. Pretty weird.

I've tried the reinitialization procedure on both keys and it has no result. (have done it successfully on my wife's car when we got a new key so I know I can do it)

Also did the locking gas cap test. Locked car with key in drivers door cylinder and the gas cap did lock so it shouldn't be the actuator messing things up.

Have searched a plenty and not found any good ideas...thoughts anyone?
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Steve in the foothills of the Rockies
1991 325iC
2002 325xiT
1967 Jaguar 420G
2003 Moto Guzzi 1100
1989 Honda XR600r
1968 BSA Shooting Star
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Old 12-04-2013, 12:53 PM   #2
jc179
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Join Date: Jul 2007
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Init the new key of your wifes car to yours; or simply init one of your two broken ones to your car. In either case you'll find out if you have the unlikely case of two bunk keys.

Beyond that, If your sitting inside your car with the door closed - when you press the lock button on your current key; does the LED on the clown nose do anything? Do you hear any click from the General Module behind the glovebox? The relay's on there are known to crap out. There are two sets so to speak, 1 for the door locks, and 1 for the double lock. A friends car had a similar issue; and we pulled the two wires out of the connector the GM so it couldn't to the 'double lock' business.

Also - when you open the drivers door, does the dome light operate normally?

Jonathan
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Old 12-07-2013, 10:45 AM   #3
iamnail
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Quote:
Originally Posted by biglittledog View Post

Have searched a plenty and not found any good ideas...thoughts anyone?
Have you checked the buttons' contact points? If at least one button works, then you know that the transmitter and receiver are good, which means that it's a hardware problem with the key or a software problem with the car. This would not prove that it's not a software problem, but it's an easy and free thing to open the fob and clean the contacts. It worked for the fob from my old van.

Neil
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Old 12-07-2013, 03:59 PM   #4
biglittledog
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Quote:
Originally Posted by jc179 View Post
Init the new key of your wifes car to yours; or simply init one of your two broken ones to your car. In either case you'll find out if you have the unlikely case of two bunk keys.

Beyond that, If your sitting inside your car with the door closed - when you press the lock button on your current key; does the LED on the clown nose do anything? Do you hear any click from the General Module behind the glovebox? The relay's on there are known to crap out. There are two sets so to speak, 1 for the door locks, and 1 for the double lock. A friends car had a similar issue; and we pulled the two wires out of the connector the GM so it couldn't to the 'double lock' business.

Also - when you open the drivers door, does the dome light operate normally?

Jonathan
Hi and thanks for the help!
Fyi, my clown nose doesn't light because my car never had the alarm system afaik…

I was able to initiate my wife's key to my car electronically and all buttons on hers work normally on my car so it must be two bad keys. Neither of mine will initiate to my car, it just opens all the windows because it doesn't see the center button pushed 3 times…

I am unable to initiate mine to hers *I'm assuming* because the center buttons don't work.

Yes, my dome light operates normally when I open the driver's side door.

I DID remember to initiate her key back to her car!

I'm going to open mine up and see what I see…
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Steve in the foothills of the Rockies
1991 325iC
2002 325xiT
1967 Jaguar 420G
2003 Moto Guzzi 1100
1989 Honda XR600r
1968 BSA Shooting Star
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Old 12-07-2013, 09:31 PM   #5
biglittledog
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Well it turns out both center switches were broken off their circuit boards. Here are some macro photos:
I've soldered them back on and have working keys now!
http://www.flickr.com/photos/stevero...7638460347513/
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__________________
Steve in the foothills of the Rockies
1991 325iC
2002 325xiT
1967 Jaguar 420G
2003 Moto Guzzi 1100
1989 Honda XR600r
1968 BSA Shooting Star

Last edited by biglittledog; 12-19-2013 at 10:33 AM.
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Old 12-10-2013, 01:03 PM   #6
scottjoh
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weird diamond key fob double problem

One of the biggest problems with diamond keys is the solder joints breaking or components breaking from the board flexing when the buttons are pressed. I see bad buttons all the time, but, rarely see dead batteries that need to be replaced like all the threads regarding non-working key fobs would suggest.

Last edited by scottjoh; 12-10-2013 at 10:14 PM.
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Old 12-19-2013, 09:56 AM   #7
biglittledog
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Yes, I agree on the battery replacement probably being a waste. It's very easy to check the batt voltage with a cheap voltmeter while you have the key open. Rechargeable lithiums last a long time with no problems.
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Steve in the foothills of the Rockies
1991 325iC
2002 325xiT
1967 Jaguar 420G
2003 Moto Guzzi 1100
1989 Honda XR600r
1968 BSA Shooting Star

Last edited by biglittledog; 12-19-2013 at 02:28 PM.
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