 | Home > Puma (Tdci) > Hazards flashing when I hit a bump |
 
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| Fifth Horseman Member Since: 08 Mar 2011 Location: Lanarkshire Posts: 322   
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The alarm module has an inertia switch that in the event of an impact will unlock the doors and flash the hazard lights. It sounds like yours is a bit over sensitive - its not adjustable though. Check the alarm module is secured properly to the bulkhead as if its not then this may lead to this.
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1st Aug 2017 8:08pm |
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| Deadeye Member Since: 01 Aug 2017 Location: Zambia Posts: 9  
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So I was told this somewhere else as well but apparently the 2.4 doesn't have an inertia switch. I bought one and searched around on the bulk head but it wasn't there. It's driving me nuts!
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2nd Aug 2017 5:43am |
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| Fifth Horseman Member Since: 08 Mar 2011 Location: Lanarkshire Posts: 322
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It’s built into the 10AS alarm module. The separate inertia switch was only for the TD5 and was on the bulkhead in the engine bay it operated the fuel pump cut-off IIRC
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2nd Aug 2017 9:16am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17383 
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^^ Are your sure about that?
I have never seen anything to suggest that the AS10 has any form of movement detection built in, and there are no references to such a feature that I know of in any Landrover or Lucas literature. Furthermore, if your Defender is struck while parked, or whilst driving with the doors locked, I do not believe that the doors unlock (there was a time in the early days of central locking when this was a favourite approach of thieves - bang the car and it unlocks - so it was discontinued pronto). It would also probably be activating constantly when driving off road if this feature existed. The inertia switch is provided when a vehicle has an electric fuel pump and its purpose is to reduce the risk of fire by shutting the pump off. The TD5 Defender has one for this reason, whilst the 2,4 TDCi does not. I imagine that the 2.2 TDCi probably does, but I've never looked. I don't however think that the AS10 is clever enough to do this, and think it is more likely that it is due to water ingress into the AS10, or a loose connection or intermittent ground fault somewhere. It could even be a fob malfunction. |
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2nd Aug 2017 11:41am |
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| srod Member Since: 20 Mar 2015 Location: Argyll Posts: 190 |
It sounds like quite a fun feature. I wish mine did this!
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2nd Aug 2017 11:59am |
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| Deadeye Member Since: 01 Aug 2017 Location: Zambia Posts: 9
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Luckily the fuel doesn't cut off as well otherwise I would come to a grinding halt. It is indeed the rough roads that make it go off. I have checked all loose wiring and grounding and everything seems fine. I have a sneaky suspicion that it may have been in accident in the past which have maybe upset something somewhere though.
Where would I find the as10 alarm module? Please excuse ignorance, life was way easier with my old 200tdi! |
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2nd Aug 2017 12:02pm |
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| Fifth Horseman Member Since: 08 Mar 2011 Location: Lanarkshire Posts: 322
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I believe it is correct (although I may be wrong - it wouldn’t be the first time
 ) but I can’t remember where I found that information. Inside the 10AS there is a unit which I believe to be the inertia switch - I will upload a photo when I get home later today.
Regards your comment about the doors not unlocking on impact when the vehicle is parked, to inhibit this would be one reason why the alarm has a switched ignition feed, the other would be to stop it activating whist driving. Agreed water ingress or loose connection could also be the cause. |
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2nd Aug 2017 12:04pm |
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| Fifth Horseman Member Since: 08 Mar 2011 Location: Lanarkshire Posts: 322
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You should be able to find the 10AS unit behind the front right hand speaker.
blackwolf - The inertia switch is the green & beige cube top right of the PCB (it is not present on 10AS units without central locking).  Click image to enlarge Useful 10AS info here http://www.gomog.com/allmorgan/LandRoverSecurityManual.pdf Quote from Topix: The anti-theft system module also incorporates an internal inertia switch. In the event of an impact of sufficient severity to trigger the inertia switch when the ignition switch is in position II, the anti-theft system module will unlock all doors and operate the hazard flashers. The anti-theft system module will remain in this mode of operation for 2 minutes. To de-activate the hazard flashers and restore the anti-theft system module to its normal mode of operation, the ignition switch should be turned to position 0 and back to position II after the 2 minute period has expired. |
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2nd Aug 2017 6:44pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17383
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Well I never knew that! Thank you for posting the photo and link.
It could well be the answer to the OP's symptoms in that case. |
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2nd Aug 2017 9:38pm |
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5816  
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I'm still having ongoing hazard/indicator problems, similar to Deadeye with a couple of associated issues. Will take a look at this. Ta.
Interestingly, have a fair bit of rust on the bolts on the bulkhead, just alongside the speaker, and often have water in the footwell directly below after heavy rain, which I think is coming from a bad windscreen frame-to-bulkhead seal. As such, I wonder if Blackwolf's thoughts that water ingress could be a cause might also have some mileage. TBC Monsieur Le Grenadier I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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3rd Aug 2017 5:59am |
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| Deadeye Member Since: 01 Aug 2017 Location: Zambia Posts: 9
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Thanks Fifth horseman have been trying to sort for at least a year now! If it is
 would it be a case of just replacing it or would it need reprogramming?
For your help as payment you're always welcome to pitch your tent in the garden if you're ever passing through zambia! |
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3rd Aug 2017 7:16am |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
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3rd Aug 2017 7:43am |
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| Gonarezhou Member Since: 08 Mar 2015 Location: White River Posts: 178 
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Fith Horseman - you are clearly very clued up on the 10AS system! I have a recent problem starting where at odd times I have to press the unlock button twice and the indicator lights do not flash. There is no problem on the locking side. Do you think this is a module problem? The vehicle is still under warranty so I am happy to argue the case for a replacement.
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3rd Aug 2017 9:20am |
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| Fifth Horseman Member Since: 08 Mar 2011 Location: Lanarkshire Posts: 322
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I certainly wouldn’t call myself an expert!
Gonarezhou - Needing a double press and no indicator flash is the system telling you the remote (plip) battery is low. It’s detailed in the owners handbook. Deadeye - thanks for the offer but it’s probably a bit far south for me. If it’s replaced the new unit will need reprogramming to match it with the remotes and the engine ecu. The alarm unit is vulnerable to water damage in its location, although it wouldn’t be if the windscreen ‘seal’ actually worked. A simple drip shield from plastic sheet looped over the unit (as suggested by someone on this forum some time ago) would provide a fair degree of protection from water. At least a fried 10AS unit is relatively cheap to replace, unlike say the transfer box control module on a D3 which is also known for taking swimming lessons. |
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3rd Aug 2017 11:58am |
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