Car reverse jumped, full of electrical gremlins now
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Car reverse jumped, full of electrical gremlins now
Cause: I reversed the polarity when jumping start the car (Yes, that was more than stupid and I’ve been kicking myself ever time I need the AC
), it was wired for a good few seconds before I realized something was wrong.
Things that had gone wrong:
#1 turn indicator noise is gone, it works but without the ticking sound.
#2 front door open indicator is reversed. When passenger side door is open, driver side door open indicator comes up, and it works vice versa for the driver side.
#3 Stereo head unit was shot but was fixed after replacing the fuse behind it.
#4 Now the real deal, The AC works only at the beginning of each drive for a less than 10 mins and the fan stops blowing while the climate control panel is still lit, but any input on the panel has no effect on the system, side note, even when it’s working, the front outer two vents by the driver and passenger door will not blow air.
Fixes tried:
Replacing climate control panel with a used one bought off eBay, it appears that it needs to be programmed but I haven’t bothered since it doesn’t seem to solve the issue. Even though all other functions will not work util the panel is programmed, the defroster does work (Audi probably left it as it’s a safety feature?), the system still shuts off after like 10 mins just like the original one.
New blower motor tested with same result. Have had a couple of mechanics worked on it and could not figure it out. It’s a 2011 and I am afraid to take it to the dealer for the potential costs. I could live with other issues, but climate control problem caused safety issues during the winter as it’d frog up the windshield. Any suggestion will be greatly appreciated!
A crying idiot
), it was wired for a good few seconds before I realized something was wrong.Things that had gone wrong:
#1 turn indicator noise is gone, it works but without the ticking sound.
#2 front door open indicator is reversed. When passenger side door is open, driver side door open indicator comes up, and it works vice versa for the driver side.
#3 Stereo head unit was shot but was fixed after replacing the fuse behind it.
#4 Now the real deal, The AC works only at the beginning of each drive for a less than 10 mins and the fan stops blowing while the climate control panel is still lit, but any input on the panel has no effect on the system, side note, even when it’s working, the front outer two vents by the driver and passenger door will not blow air.
Fixes tried:
Replacing climate control panel with a used one bought off eBay, it appears that it needs to be programmed but I haven’t bothered since it doesn’t seem to solve the issue. Even though all other functions will not work util the panel is programmed, the defroster does work (Audi probably left it as it’s a safety feature?), the system still shuts off after like 10 mins just like the original one.
New blower motor tested with same result. Have had a couple of mechanics worked on it and could not figure it out. It’s a 2011 and I am afraid to take it to the dealer for the potential costs. I could live with other issues, but climate control problem caused safety issues during the winter as it’d frog up the windshield. Any suggestion will be greatly appreciated!
A crying idiot
AudiWorld Senior Member
Joined: Feb 2018
Posts: 1,943
Likes: 472
From: Canada
Can you post diagnostic scan results? There is likely a ton of DTC’s present so you may want to save a copy and clear them all, then perform a few drive cycles, then scan again to see current active codes.
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AudiWorld Senior Member
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From: Canada
Always best to start by looking up recurring DTC’s on a trusted site like Ross Tech for more information. It is not clear which module is producing these codes from your scan picture. Unless there is a fuse issue then sounds like at least one control module might be damaged. Your P02071 DTC specifically says Short To Ground but the generic DTC on Ross Tech says No Signal / Communication so there is potentially a difference in detail of this DTC to be investigated further. A full VCDS scan would be ideal as it will list all details under all modules.
http://wiki.ross-tech.com/wiki/index.php/02071
http://wiki.ross-tech.com/wiki/index.php/01087
http://wiki.ross-tech.com/wiki/index.php/02071
http://wiki.ross-tech.com/wiki/index.php/01087
Last edited by AudiAllTheWay; Jul 28, 2024 at 11:17 AM.
Thread Starter
AudiWorld Junior Member
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Always best to start by looking up recurring DTC’s on a trusted site like Ross Tech for more information. It is not clear which module is producing these codes from your scan picture. Unless there is a fuse issue then sounds like at least one control module might be damaged. Your P02071 DTC specifically says Short To Ground but the generic DTC on Ross Tech says No Signal / Communication so there is potentially a difference in detail of this DTC to be investigated further. A full VCDS scan would be ideal as it will list all details under all modules.
02071 - Ross-Tech Wiki
01087 - Ross-Tech Wiki
02071 - Ross-Tech Wiki
01087 - Ross-Tech Wiki
AudiWorld Senior Member
Joined: Feb 2018
Posts: 1,943
Likes: 472
From: Canada
One word of caution regarding swapping out modules as Component Protection is likely present. Simply replacing a module with like module is no longer simple as Component Protection would likely become an issue. As long as your prepared to resolve CP DTC(s) then your good to proceed.
I would like to see a full VCDS or perhaps OBD11 scan before offering more suggestions to resolve. We may not be seeing the full scope of DTC’s from your current scan screen shot. I’m sure others can chime in with further insights as well.
I would like to see a full VCDS or perhaps OBD11 scan before offering more suggestions to resolve. We may not be seeing the full scope of DTC’s from your current scan screen shot. I’m sure others can chime in with further insights as well.
Thread Starter
AudiWorld Junior Member
Joined: Nov 2020
Posts: 8
Likes: 0
One word of caution regarding swapping out modules as Component Protection is likely present. Simply replacing a module with like module is no longer simple as Component Protection would likely become an issue. As long as your prepared to resolve CP DTC(s) then your good to proceed.
I would like to see a full VCDS or perhaps OBD11 scan before offering more suggestions to resolve. We may not be seeing the full scope of DTC’s from your current scan screen shot. I’m sure others can chime in with further insights as well.
I would like to see a full VCDS or perhaps OBD11 scan before offering more suggestions to resolve. We may not be seeing the full scope of DTC’s from your current scan screen shot. I’m sure others can chime in with further insights as well.
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AudiWorld Senior Member
Joined: Feb 2018
Posts: 1,943
Likes: 472
From: Canada
It is apparent Address 08: Auto HVAC Control Module has an issue. Simplest item to check first is the fuse. After that try talking to it with something like VCDS to see if it actually communicates or if it continues to be unavailable. Ideally you have an old VCDS or similar scan data that contains HVAC Controller Part Number and the Soft Coding so that it can be transferred to an identical replacement module if required, but again if replacing modules then you are likely going to run into CP which will also need to be resolved afterwards.
As a separate issue I would address the Fuel Injector DTC.
As a separate issue I would address the Fuel Injector DTC.
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