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meeerrrk

Member Since: 12 Feb 2017
Location: Surrey
Posts: 548

2010 Defender 90 Puma 2.4 HT Stornoway Grey

OBD security

Please tell me if I'm posting any info I shouldn't. I've thought about it and I'm pretty sure this is fine.

I've recently purchased and programmed a new key fob using the one shot programmer. I knew it was easy but it's quite shocking really, and it's got me thinking about OBD security. I've considered a few options but I've stumbled upon quite a simple and effective method.

The ecu can only have 4 fobs programmed to it, so in theory if you "occupy" those 4 with genuine keys of your own, no one can easily program another, thus removing the risk while keeping the OBD socket fully functioning and in its factory loctation.

What do you guys think, reasonable in theory? My 90 Project : http://www.defender2.net/forum/topic52774.html

16th Mar 2017 1:22pm

X4SKP

Member Since: 29 Nov 2013
Location: Berkshire
Posts: 2295

2010 Defender 90 Puma 2.4 SW Stornoway Grey

Hello meeerrrk

I'd say we're safe so far...

Interesting observation...I've secured access to my OBDII, but your thinking may well be right.

The 10AS Alarm Information does appear to 'limit' the total number of Key Fobs to 4

Click image to enlarge

Click image to enlarge

Can't be that simple, can it...

SKIP
https://www.defender2.net/forum/topic83242.html

16th Mar 2017 1:56pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4786

It would stop people using the one shot programmers. However if they had a little more time and were correctly tooled then physical obd security would be better. And probably more cost effective than getting more fobs

2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
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16th Mar 2017 5:03pm

zsd-puma

Member Since: 09 Aug 2016
Location: Kent
Posts: 2720

2010 Defender 110 Puma 2.4 USW Santorini Black

Programming 4 fobs wont have the effect you're after.

As you can just reprogram another fob which will make the car forget the 4 previously programmed.

It just means you can have up to 4 programmed at the same time, not the same 4 for eternity.

I thought about cutting the 16 pin OBD connector off of mine then replacing it with some sort of non-standard connector, i'd just then need to make a 16 pin to what ever adaptor harness for my IID tool.

16th Mar 2017 7:56pm

meeerrrk

Member Since: 12 Feb 2017
Location: Surrey
Posts: 548

Thanks ZSD, that isn't how I had understood it I must admit, but I know next to nothing about these systems so I will assume you know more than me.

I think I'll still make some OBD security , I like your idea of a non standard plug and patch loom, nice

My 90 Project : http://www.defender2.net/forum/topic52774.html

16th Mar 2017 10:11pm

zsd-puma

Member Since: 09 Aug 2016
Location: Kent
Posts: 2720

I don't think a connector would even have to be 16 pin, as i don't think all 16 pins are fully populated.

16th Mar 2017 10:29pm

meeerrrk

Member Since: 12 Feb 2017
Location: Surrey
Posts: 548

That's correct only about 4 or 5 from Memory. It certainly isn't fully populated anyway. My 90 Project : http://www.defender2.net/forum/topic52774.html

16th Mar 2017 10:31pm

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