crazydiamond70 Posted January 11 Posted January 11 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 Posted January 11 Posted January 11 How old is the battery? How many times has it gone flat?
crazydiamond70 Posted January 11 Author Posted January 11 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 Posted January 12 Posted January 12 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 Posted January 12 Author Posted January 12 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 Posted January 12 Posted January 12 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.
cliffcoggin Posted January 12 Posted January 12 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 Posted January 12 Author Posted January 12 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 Posted January 13 Author Posted January 13 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 Posted January 13 Posted January 13 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 Posted January 13 Author Posted January 13 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.
crazydiamond70 Posted January 18 Author Posted January 18 At a loss now, sent off the bmc2 for repair, said nothing wrong with it,
crazydiamond70 Posted January 18 Author Posted January 18 And i did put another battery into it , nothing changed
crazydiamond70 Posted January 19 Author Posted January 19 well it seems a staff member has no idea but has plenty of sarcasm
crazydiamond70 Posted January 19 Author Posted January 19 On 1/13/2025 at 1:56 PM, cliffcoggin said: I am clearly wasting my time trying to convince that your battery is clapped out, so I'll leave you to it. Good luck. Spare battery no charger attached is a 95ah 800a multi meter reads 13.82v Battery on car no charger is a 95ah 750a multi meter reads 13.21v How can you convince me battery clapped out. I said numerous times , not a battery issue
crazydiamond70 Posted January 28 Author Posted January 28 Solved , its corrosion , where the live cable from battery is spliced , Nothing at all to do with the battery , mr staff member know it all. Could have cost me £200 quid for a new battery.
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