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If the dash doesn’t light up , it’s not going to start , as this forms part of the immobiliser network. Best you can do is check fuses in the engine bay box and also the one at the end of the dash , driver side . Any evidence of damp/ water in the footwells ?
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Dash doesnt light up, no, the car does start, but dies after literally a second or two. Adding throttle has no effect. Battery is fully charged, i can do the above, 10 times over, it will start, and then it will die! I mention the electronic boot spoiler, only because it never used to raise, unless i am travelling at speed, yet tis in its raised position now. The drivers window, i can only assume, dropped slightly, as i went to start it, though i dont recall it ever dropping, when i started it before, prior to this issue! The passenger window is up fully!
No damp in boot or battery tray!
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Turning key does nothing, this model requires clutch to be pressed, and then key to be turned, to start! Which works, for a second, although no response from dash cluster at all, no lights, no needles moving around!
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On vag models , if the engine starts and dies after a few seconds, then this is an indication of an immobiliser fault . As I said previously, if the dash doesn’t illuminate, it’s not going to start. More in depth diagnostic required. What about damp in the cabin area , under seats and footwells ?
Edited by elekie&a/c doctor on 18/11/2022 at 15:27
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No damp anywhere, car was in regular use! If its an immobiliser fault, why does car start briefly? I thought it wouldnt start at all?
If it IS an immobiliser fault, due to rain, are we talknig fuses here? Cheers
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I can’t give you an answer to that . It’s the system designed by VW . Don’t think you’re going to go forward with this without some diagnostic intervention.
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Thanks anyway, ill get onto that!
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Just to clarify, no response from dash cluster, means no power going to cluster, which potentially means blown fuse?
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Sadly , not so simple, I’m afraid . The cluster needs more than a power supply to fire up . Certainly worth checking the fuses first .
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I do have the owners manual in front of me. No mention of which fuse might be the culprit, if any! Very strange how this all just started
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Take a look at fuse #33 . Should be a 5amp , orange colour.
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Quick update. Car starts and drives fine, there WERE no lights on th edash, now there are several, steering light, traction/ESP, red exclamation mark, glow plug light, amongst others! Car still starts and drives fine! Sometimes 'DEF' message appears on dash, sometimes not! I dont believe that ALL these systems have an issue. Unplugging battery for few mins makes no difference! I know i need to get it scanned, but, is there anything else i could check meanwhile? Everything seems to work, windows, blower, radio etc. When i switch off, the dash lights remain on, for a minute or two! What was fuse 33 anyway? Cheers
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Hi, I’m currently having the same problem
On my 2010 Audi TT Tdi, also have no damp, did you ever get to the bottom of it?
Cheers
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I did have a good feel around the footwell, not damp. I have left a large bowl of salt there overnight, for good measure
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Most of those warning lights will illuminate after a battery disconnect. Driving the car for a few minutes should resolve most of those . However, the def light is the dpf warning light . May go out after a longer drive. Fuse 33 is for the instrument pod . May be worth checking the fuses for tightness in their locations.
Edited by elekie&a/c doctor on 25/11/2022 at 14:25
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Further update, lights went out after 30 secs of engine running, i assume that fuse was sound, but as i pulled it out, it dropped down beyond reach, i replaced it anyway. Time will tell..
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Time will tell..
Re read the post further up re battery - if it's on it's way out it can cause havoc.
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Time will tell..
Re read the post further up re battery - if it's on it's way out it can cause havoc.
AGREED
Test battery voltage. Anything less than 12,5V = new battery needed.
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Battery showing over 14v when running, and passed the Drop test too. Currently no issues or lights on dash, but like i mentioned before, it went, then came back! Seemed to start after heavy rain for a couple of days, though no signs of damp anywhere!
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Is this a cabriolet model ?
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no was 2 dr coupe, now sold, thanks for the help though! Didnt misbehave since i last mentioned it!
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