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Dead Instrument Cluster

Old 01-20-2018, 11:18 AM
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Thanks guys! Just signed up as I am searching for an answer to why my Instrument Cluster went into RipVanWinkle mode. I took the battery out for 2 days to recondition it but ended up buying a new battery. Once installed, nothing worked.. No IC lights. Key still works on the door.... Picked up a Vag-Com cable from Australia but no connection to IC module. No connect to Immobilizer module..
Gonna try audinutt's unplug option. Big thanks to 2001 S8 for posting the .pdf on disassembly.
I'll let you know if it works!
2000 Audi A8
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Old 01-21-2018, 09:38 AM
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I had to completely unplug and replug mine when it acted up, just mashing on the connections did not help. People should be sure to have the right sized allen driver in the car in case this happens and maybe a wire cutters to cut the ziptie.
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Old 01-21-2018, 11:08 AM
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Wow! I wish I had found this post prior to buying the Vag-Com cable. Went through the routine and PRESTO! LIGHTS! HAPPY DANCE! The car has been sitting since mid-December but it ran like usual. Took it out for a quick spin. Glad I didn't button up the cluster all the way because about 1/2 mile from home I noticed that the speedo wasn't working, ABS light was on and Brake was blinking. Gonna redo the connectors today and hope it gets resolved. What a neat trick. Who'd a thunk it!
Thank again to all!
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Old 01-21-2018, 11:58 AM
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jfrahm, I don't think the procedure is to make sure connections are good. It is to completely remove the old "handshake" between cluster and computer and re-establish a new one. That is why you must completely disconnect.
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Old 07-29-2018, 07:05 PM
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Originally Posted by 2001 S8 View Post
This has been said before but the knowledge that is known and shared on this site is invaluable. I want to do what I can to pay it forward, below is the link to instructions on removing the instrument cluster. I've also included at pdf of the removal procedure for reference, in case in the future the link is broken.

Audi Pages

Once again a huge thanks to audinutt. Those two sentences you wrote saved me over $1500.
Hi. Not to revive an old, dead thread, but I've had this happen to a nice FL (01) A8... it's actually stranded near my son's place out in Minneapolis. Center cluster completely dead, engine will start for a couple of seconds then die. All this happened while jumping/charging/replacing batteries, when the old DieHard died hard.
I ended up needing to store it out of the way, but definitely need to go retrieve it. To make matters worse, I also tried to start it once in there with a spare key of unknown origin. So, from your instructive thread I'm at the 95% confidence level that I've got the same issue on this car that you described here. Immobilizer has it effectively immobilized.

it sounds like I need to pull out the cluster, remove-and-reseat the three connectors. For this to be effective-- did you leave the battery in the trunk connected when you did it? PaulW had posted once that he thought the "authentication code" between cluster-and-reader had gotten out of synch, so the two CPUs would re-sync if you pulled and re-seated all the connectors to the cluster. So, I'm assuming you had the battery connected when it worked for you?

Thanks for any info you can provide. It's a nice, correct, well-sorted car. And, it's currently a brick due to this issue so I'd like to get it running and out of my son's way.

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Old 07-29-2018, 08:33 PM
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Location: South Dakota
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Yep, left the battery connected. I just unplugged all connectors to the cluster, waited 30 seconds, reconnected the connectors to the cluster and she started right up. So far I've never had it happen again. I guess it's the "Old IT fix"; turn it off, unplug it, plug it back in and restart : )

Good luck. Hope you get her running again.
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