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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554  |
Big problem LR have no stock
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2nd Nov 2021 4:22pm |
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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2229  
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Has anyone ever looked into what sort of communication link is used between the BBUS and the 10AS unit?
The BBUS only has four cables which from a quick look at the schematic are permanent live, ignition switched live, earth and one which is triggered by the 10AS unit. The one which triggers the BBUS appears (at least from the wiring diagram) to also pull the sounder relay to ground so looks like just a basic input/output. I don't have a BBUS myself to confirm but it could be quite simple to integrate an aftermarket unit. I don't recall there being any diagnostic or coding available via Nanocom. The only thing I cant quite get my head around is how the BBUS knows if the alarm is in the armed/disarmed state though. Maybe this doesn't matter and it wants to see the ignition positive to avoid it sounding when it is disconnected from the battery? Steve 02' 110 TD5 Double Cab Rebuild Thread |
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2nd Nov 2021 4:56pm |
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| Penfold_6290 Member Since: 22 Sep 2021 Location: Dorset Posts: 319 
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Here’s the extract from the Td5 2002MY electrical library.
 Click image to enlarge |
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2nd Nov 2021 5:00pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
The only thing I cant quite get my head around is how the BBUS knows if the alarm is in the armed/disarmed state though. Maybe this doesn't matter and it wants to see the ignition positive to avoid it sounding when it is disconnected from the battery?
Simple delay time is enabled then you switch ignition positive too it and remover this supply the sounder and providing remote battery power is removed with set time unit is disarmed and only re-enable with reinstatement remote battery power and all controlled by on board chip |
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2nd Nov 2021 8:27pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
Good idea to find good replacement BBUS that can be made to inter face with AS10 alarm unit with same 4 pin socket used on the LR battery back sounder i.e. plug and play as JLR no longer stock the sounder unit
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4th Nov 2021 7:08pm |
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