Car alarm issue Toad Ai606

more pics after desoldering stuff, zener diode is toast its broke in half so not sure what to do there. the 2 burnt out resistors seem to both have the same resistance of 100ohm so maybe they are 100 ohm or they both got cooked to the same temp to give same wrong reading? not sure there. some trace damage too looks like a single layer board so not sure now.

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Cyber-Mav said:
probably a massive ask here but if its got the v1 siren square type (v2 is round) would you be able to take a pic of the circuit board for me? also its bes to remove its internal battery to be on the safe side so you dont get the same issue i did.
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Just checked and mine is the round one unfortunately. Otherwise I would be more than happy to help.
 
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I can't really help other than saying i had one of those fitted to my Integra type R and it was nothing but trouble and that was 14 years ago, i ended up having to never lock the car as it would go off randomly which sort of defeats the purpose a bit..
 
odd it does have sensitivity adjustment for ultrasonics. for people that had it randomly going off its usually down to dodgey door, boot or bonnet switch when car gets hit by wind it may trigger a flaky switch to go off.
 
Cyber-Mav said:
odd it does have sensitivity adjustment for ultrasonics. for people that had it randomly going off its usually down to dodgey door, boot or bonnet switch when car gets hit by wind it may trigger a flaky switch to go off.
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Yeah when outside with massive wind that could also trigger it. Doesn't help when you got frameless doors either!
 
gc123 said:
was going to say if i cant find the unit , i have got several cobra battery back up units either complete or in bits and im pretty sure in the day we would swap internal components over just looking at your pictures they look very similar. it really depends how far you want to go into it as clearly its past its best but some like originality.
if you have disconnected the battery pack and the unit still works ,i would probably cut out the damaged components and just use it minus battery back up atm.
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it was glitching with the dodgey noise and draining car battery. looks like your my last hope, let me know if you find a toad siren. not sure how much faffing would need to be done to get a different model siren to work if it involves messing about with the actual ai606 brain.
 
sx_turbo said:
All my old cars used to have toad ai606 alarms in, blast from the past. Unfortunately they've been discontinued now now due to rising costs from china and lower demand. Scorpion who own them have also decided to no longer to that ham cat 1 alarms as they don't see a requirement.

Remember Clifford used to be expensive and considered cool, but pretty unreliable, toad was cheap but worked perfectly, there was scorpion (owned or bought toad) whose products were good and expensive but no one I knew bought them..

Anyway fingers crossed you might be able to find a decent 2nd hand unit, I see people are selling batteries for them
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I never liked the fob for the Toad
 
Given that PCB is down to the fibreglass weave, make sure you liberally apply something to neutralise the chemicals from the battery. In my experience if they have soaked into the board they will continue to slowly cause corosion unless completely neutralised.
 
Nomisf said:
Given that PCB is down to the fibreglass weave, make sure you liberally apply something to neutralise the chemicals from the battery. In my experience if they have soaked into the board they will continue to slowly cause corosion unless completely neutralised.
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yep will do. surprised how much heat the boards can take, didnt know they were made of fiberglass, always thought it was some sort of thermoplastic.
 
Cyber-Mav said:
yep will do. surprised how much heat the boards can take, didnt know they were made of fiberglass, always thought it was some sort of thermoplastic.
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Assuming it's FR4 (like most circuit boards) then there's an epoxy coating on the fiberglass weave and then the top coat on top of that which is why they look like a thermoplastic from the top and bottom
 
removed the sticker of the small chip and its got some markings on it:

12C508A
04/P01V
0113

maybe if i can find a datasheet for this it may give schematic info of whats supposed to be connected to it and how?

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Cyber-Mav said:
removed the sticker of the small chip and its got some markings on it:

12C508A
04/P01V
0113

maybe if i can find a datasheet for this it may give schematic info of whats supposed to be connected to it and how?

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That's a programmable (specifically PIC) so some of the pibs may have multiple poptions as GPIO - product page here (data sheet part way down the page, should jump to the right section, but not sure linking to pdf's directly wil be frowned upon) https://www.microchip.com/en-us/product/PIC12C508A#document-table
 
hmm i need to read the code from this chip and see what its doing then can get an idea of the circuit its controlling and progress from there.


waiting for the other sirens to arrive too so covering this from different angles.
 
Cyber-Mav said:
hmm i need to read the code from this chip and see what its doing then can get an idea of the circuit its controlling and progress from there.


waiting for the other sirens to arrive too so covering this from different angles.
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Bear in mind if it isn't written in protected mode it will give you machine code  not the original code with any comments so you'll probably need to go pretty deep in to the data for the chip to work out what each instruction is doing.

If it is code protected then you aren't going to get anywhere as it will refuse to export the contents of it's programmable flash.
 
more than likely carries the code to match the alarm, although some of the early cat 1s pretended (ahem) to be coaded but actually were just positive negative triggers.
 
from what iv read up on this, the sirens are not coded as such to be linked to the main alarm brains hence why swapping the siren for a working one will work fine. too much old stuff wearing out. iv been saying it for years but this summer i will deffo get the ecu out of the car too and check for any dodgy capacitors and replace. car is now 29 years old so.....
 
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