Hi, Romanrob & others.
I saw this conversation was a few years ago - but - checking if anybody would follow it...presenting my problem.
I have the same Q5 as Romanrod, i.e. Q5 2010 with 2,0 TDI, engine-code CAHA.
After having issues with charging, the red blinking battery symbol after the message that there is low or no charging last November I have been working on the car, not being able to drive it. Status Quo is: New battery installed, aftermarkt model battery with no BEM code - did, however code in via OBDeleven by changing one digit to trick the BEM into knowing there is a new battery. New generator installed after I first tried to replace the regulator only.
Symptoms: ( the same that were there before and after BEM coding)
Ignition off - get 12.6 - 12,7 at B+, Jump socket (the one under hood) and on battery itself.
Motor running, I get 14 - 14,5 V on B+ but I only get battery voltage (12.0 - 12.2 or lower) everywhere else, (i.e; jump socket and on the battery.) Note: NO "battery light warning" on instrument panel, suggesting that the system believes everything i fine. I can drive the car as far as the battery carries me -There is NO battery warning light - but - battery is NOT charged...
I would like to follow the B+ down to the generator to se how far the 14 volt reach. BUT the gen. and it's connectors, are so badly situated that it is almost impossible to get a measurement cable down there without tearing everything apart - and at that point you wouldn t be able to start the car....
Has anyone tried to short-cut directly from B+ up to the jumpsocket + just to see what happens? It is all + but of course with a voltage differential. You would use a fuse inbetween?? If this were to work, and the battery get's charged I ´could drive like that. The car is my 2nd car and has high mileage...but I like it.
Anybody experienced / ascertained a bad connection at starter leading no charging-voltage up to jump-socket and further, to battery? OR is the BEM, being unhappy, capable of completely shutting off charging?
Grateful of any input.
regards
Markku, Stockholm, Sweden
