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PointedThree :  Vans, Trucks, SUVs and Other Forums : G-Class : key fob issue with 2003 G500

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key fob issue with 2003 G500
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Posted 1/12/2018 1:42 PM
mwhite308
Regular


Date registered: Aug 2015
Location: Birmingham, Alabama
Vehicle(s): Landrover LR3, 1984 Ferrari 308, 2003 MercedesG500
Posts: 65
50
key fob issue with 2003 G500

Ok........It got real cold (for Birmingham Alabama) last week. I went out side to unlock My G and nothing. Light coming on on the remote but I replaced the batteries in it anyway just to see. For some reason the actual metal key wouldn't open either the driver or rear doors. Even after using a heat gun on the locks so I'm not sure what is going on there (one issue at a time a suppose). I broke into the vehicle and everything was dead as I was told by a neighbor that in the middle of the night, the alarm was going off. I figured it was a good time to get a new battery anyway. So, my key fob works in the ignition but it only remotely locks and unlocks the doors intermittently with no rhyme or reason. If I go out in the morning after it sitting all night, it won't work. Once I get in, stick the remote in the ignition and crank it for a few seconds, I can pull it out and it will unlock and lock on the remote. I can get out and remote lock it and be gone for an hour and come back and it won't remotely unlock. I may go somewhere and remote lock it and come back in 2 hours and it will unlock remotely just fine. No consistency with situation, time or temperature. Any advice on who to trace this down to find the culprit here?

Thanks,

Matt
#238098
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Posted 1/12/2018 2:46 PM
AlanMcR
Expert




Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
2000
RE: key fob issue with 2003 G500

If the LED lights on the key and you've put new batteries in then we can probably rule out the key. 

The next suspect for random work/not-working of the locking system is the "Kiekert" relay that powers the door lock motors.  These develop solder cracks over time, and the cold weather may be making that worse.  Not sure where that is on a 2003.

#238102 - in reply to #238098
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Posted 1/13/2018 3:22 PM
mwhite308
Regular


Date registered: Aug 2015
Location: Birmingham, Alabama
Vehicle(s): Landrover LR3, 1984 Ferrari 308, 2003 MercedesG500
Posts: 65
50
Re: key fob issue with 2003 G500

Can anyone help with where this is located on a 2003 G500?
#238118 - in reply to #238098
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Posted 1/18/2018 2:13 PM
mwhite308
Regular


Date registered: Aug 2015
Location: Birmingham, Alabama
Vehicle(s): Landrover LR3, 1984 Ferrari 308, 2003 MercedesG500
Posts: 65
50
Re: key fob issue with 2003 G500

looking for anyone that can tell me where this is located so I can pull it out to check it. Any help would be greatly appreciated. " "Kiekert" relay that powers the door lock motors"

Matt
#238206 - in reply to #238098
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Posted 1/18/2018 3:12 PM
BlueG
Elite Veteran


Date registered: Aug 2009
Location: DC
Vehicle(s): 2003 G500
Posts: 714
500
Re: key fob issue with 2003 G500

Do the new W463 even have this relay? I am not sure you will find one on a 2002+ model.
#238208 - in reply to #238098
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Posted 1/18/2018 5:05 PM
mwhite308
Regular


Date registered: Aug 2015
Location: Birmingham, Alabama
Vehicle(s): Landrover LR3, 1984 Ferrari 308, 2003 MercedesG500
Posts: 65
50
Re: key fob issue with 2003 G500

I am not sure. I just know that my remote will lock and unlock if I spend just a lttle time away but if I spend more than about an hour, it will not unlock.

#238212 - in reply to #238098
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Posted 1/21/2018 11:17 PM
mwhite308
Regular


Date registered: Aug 2015
Location: Birmingham, Alabama
Vehicle(s): Landrover LR3, 1984 Ferrari 308, 2003 MercedesG500
Posts: 65
50
Re: key fob issue with 2003 G500

I will try once more I suppose. Can anyone tell me where this relay is located so I can check the older joints? 2003 G500
#238232 - in reply to #238098
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Posted 1/22/2018 8:40 PM
BlueG
Elite Veteran


Date registered: Aug 2009
Location: DC
Vehicle(s): 2003 G500
Posts: 714
500
Re: key fob issue with 2003 G500

Give Vlad a call. He knows his G's. He sells the relay here - he might know what exactly you need to do

http://fourbyfourclub.com/W463ElectricalParts/W463DoorControlModule...
#238241 - in reply to #238098
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Posted 1/23/2018 1:38 PM
ychung
Veteran


Date registered: Aug 2015
Location: SO CAL
Vehicle(s): 2004 G500, 2014 ML350, 2008 S550
Posts: 196
100
RE: key fob issue with 2003 G500

I don't think there is a Kiekert relay on 2003
#238245 - in reply to #238098
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Posted 12/29/2020 12:15 PM
imjustdave
Regular


Date registered: Feb 2012
Location: Bonney Lake Washington USA
Vehicle(s): 2004 G500, 2014 Audi Q7 TDI, 2006 Ram 3500.
Posts: 77
50
Re: key fob issue with 2003 G500

Anyone know when the Kiekert was phased out? Also once gone what took over the function of this relay?
#242332 - in reply to #238098
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Posted 1/8/2021 9:02 PM
JCH4
Regular


Date registered: Jun 2010
Location: Charleston, SC
Vehicle(s): 2003 G500, LR 1972 IIA, LR 1962 IIA, Husqvarna 350
Posts: 99
50
RE: key fob issue with 2003 G500

I just started having this issue too. Unlock on key works fine for about two hours after the car has been started but over two hours and will not work and have to use valet key to get in. After start up will work again for two hours than not work after. Would love to know solution to this problem as well. 2003 G500 with 198k.
#242366 - in reply to #238098
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