Audi dead. pointing to control module

[crazydiamond70]

Hi all, wondering if anyone can answer a few questions. Audi is dead. 

What led to this, car been off road for a few months, fan belt snapped on motorway, fixed, was then having lots of fault codes, that pointed to a fuse in the engine bay, replaced the fuse, the throttle body connector caught fire.Had a water pipe burst that i fixed, so unsure throttle body got wet. replaced throttle body, Dpf blocked at same time, went into limp mode. So off road for 2/3 months.Managed to clear out DPF, car back on the road, yippee.

Then handbrake faults, cleared codes with OBD11. codes returned , good old google and other forums etc, suggested changing handbrake module, For battery issues , going flat , not providing module with the power needed. Handbrake module is plug and play ??  swapped handbrake module, ok for a day , same faults but when handbrake used ,stalled engine . clear faults , then noticed smoke from area where module is located.Put original module back on , then got a hell of a lot of issues , component protection activated U fault codes, no dash lights , no start, would take car ages to wake up, to start, then would not turn off when key pushed in. lots of clicking sounds in the rear, that i think were coming from the comfort control module. 

Now the car is dead, had battery on charge , thinking battery related, nothing works, apart from windows , hazards, seat motors. 

So questions , seems to be the comfort control module is dead, is there another module that controls the comfort one, Obd11 faults before car died, mentioned control module A or is module A the one in the rear? How did i get all these faults, by swapping handbrake module, same part number , but different letter at the end.( Firmware upgrade )

Would cloning or have the comfort module repaired fix this car ??  or is there another module, that needs repairing alongside??  

[cliffcoggin]

How old is the battery? How many times has it gone flat?

[crazydiamond70]

Hi , its slightly smaller than it should be, about a year old, never had any issues with the battery , until it got taken off the road, with the cold weather and it not being used, this is the fifth time its been charged. 

[cliffcoggin]

Allowing the battery to flatten will have damaged it, which is why it will no longer hold a charge. That damage will also interfere with the cars electronics and may explain many of the faults you experienced. I suggest you buy a new decent quality battery of the right capacity as a first step, and then get any remaining error codes checked on a code reader such as OBD11. Let us know how you get on.

[crazydiamond70]

Hi ,unfortunately ,unable to connect to car for fault codes,,which is why i've come here Also the battery does charge back up 

[cliffcoggin]

23 minutes ago, crazydiamond70 said:

 Also the battery does charge back up 

Are you now saying it does hold a charge? That is not the impression I got from your earlier comments.

[crazydiamond70]

Yes ,it holds a charge 

 

[cliffcoggin]

Yet you said it needed to be recharged five times in three months. That is not the sign of a battery in good condition. I suggest you get it professionally tested.

[crazydiamond70]

https://webautocats.com/en-gb/etka/audi/a5co/620/907000/

Both are connected. How to determine ,if both are broken oe a single one ? 

[crazydiamond70]

23 hours ago, cliffcoggin said:

Yet you said it needed to be recharged five times in three months. That is not the sign of a battery in good condition. I suggest you get it professionally tested.

All batteries will loose its charge , in cold weather without being used, charged up with alternator. Besides that , the car is not waking up ,with a fully charged battery, 

[cliffcoggin]

I am clearly wasting my time trying to convince that your battery is clapped out, so I'll leave you to it. Good luck.

[crazydiamond70]

The battery, regardless of how big or small it is at the moment , is not going to wake up failed modules. I  am now charging up  battery that is suitable , just to prove this point. Like i have mentioned the smaller battery never gave me any issues, up until this point. Have spoken to a Audi independent specialist, who said Audi modules are very sensitive to power supplied. By spikes and low currents,anything as low as  9v can ruin a module , he did say the best course of action is to disconnect the battery, when car is going to be laid up for some time.