IE: Multiple electrical issues
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IE: Multiple electrical issues
Hi
Hopefully someone can point me in the right direction
I have a 2008 1.8 tfsi that starting showing a handbrake fault and the brake would not release on one side. I replaced the module and the error continued, it also started showing weird electrical issues, occasionally when you put the key in the car would go completely dead and you could not get the key out, then after a while some of the functions would restore but not correctly, if you pressed hazards only the front illuminated, if you used indicators the drls light up instead, if you opened the door or turned on the interior light the handbrake motor could be heard. If let sit for a period of time which could be anything from 15mins to 4hrs all functions returned and the car started and drove at normal
Hopefully someone can point me in the right direction
I have a 2008 1.8 tfsi that starting showing a handbrake fault and the brake would not release on one side. I replaced the module and the error continued, it also started showing weird electrical issues, occasionally when you put the key in the car would go completely dead and you could not get the key out, then after a while some of the functions would restore but not correctly, if you pressed hazards only the front illuminated, if you used indicators the drls light up instead, if you opened the door or turned on the interior light the handbrake motor could be heard. If let sit for a period of time which could be anything from 15mins to 4hrs all functions returned and the car started and drove at normal
Thread Starter
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Further update
Car will not power on at all now since the weekend or release the key
Changed ccm 2 , no difference
Changed bcm 1; no difference
Changed key slot no difference
no change when spare key is used
No power to diagnostic Port as car won't turn on so can't do a scan with vcds
Changed ccm 2 , no difference
Changed bcm 1; no difference
Changed key slot no difference
no change when spare key is used
No power to diagnostic Port as car won't turn on so can't do a scan with vcds
AudiWorld Super User
Joined: Aug 2001
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From: Vancouver, BC, Canada
Know you said the car started before, but do you know the real status of your battery? Audi's are notorious for wierd effects if the battery is dying in any way shape or form.
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The battery was replaced last December 2020 and was checked by the garage last week , when the car goes into its sleep mode the battery is reading fine at 12.4v or above and trying to boost the battery or jump start the car makes no difference unfortunately
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From: Georgia
There should always be power on the term 30 pin to the OBD port. VCDS doesn't need term 15 to be able to communicate with the J533, assuming the J533 is functional.
With such a situation of lots of random oddities, all you can do is pick one and sort them one by one. You could have multiple harness failures, etc. There's no real way to know without direct inspection/testing.
Start by making sure every fuse that should have term 30 does show 12v. That would be brown and red (except 1-4 in brown) on one end of the dash, all of brown on the other end of the dash, and both blacks and brown in the right rear (yeah, no idea who's brilliant idea it was to invert the usage of black and red between the dash and the rear).
"if you pressed hazards only the front illuminated", sounds like your J393 (BCM2) might be dead. But you say you replaced it? So maybe you have a CAN bus line issue, but that should come across in a scan.
With such a situation of lots of random oddities, all you can do is pick one and sort them one by one. You could have multiple harness failures, etc. There's no real way to know without direct inspection/testing.
Start by making sure every fuse that should have term 30 does show 12v. That would be brown and red (except 1-4 in brown) on one end of the dash, all of brown on the other end of the dash, and both blacks and brown in the right rear (yeah, no idea who's brilliant idea it was to invert the usage of black and red between the dash and the rear).
"if you pressed hazards only the front illuminated", sounds like your J393 (BCM2) might be dead. But you say you replaced it? So maybe you have a CAN bus line issue, but that should come across in a scan.
AudiWorld Super User
Joined: Dec 2001
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From: Georgia
There is no "J518" per se, it's integrated into the J393 now in B8, the same unit that controls the tail lights. More pointing to either a dead J393, unpowered J393, or dead comms to the J393.
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From: Georgia
If you've got VCDS, just post the unabridged full auto scan log so we can see what can be seen without guessing at a lot of information which is already known. The J393 is on the convenience CAN bus, but so is a lot of other things. Are those also down, or just the J393, etc.
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It looks like my power issues and no communication issue to can were all related to corroded wiring in the drivers side trunk area, we found the wiring to be literally crumbling once moved which was possibly as a result of a leak 18months ago. Once the wires were trimmed back and connected all power was restored. I still have my original elrctronic brake issue but that should be easily resolved now the car has power and is starting 😃 below is the link I found that lead me to the source of the issue and hopefully is will save someone else a lot of effort and time if they have the same or similar issues
https://www.audiworld.com/forums/vag...plice-2973994/
https://www.audiworld.com/forums/vag...plice-2973994/
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