Won't start after head unit change.
04-13-2014, 10:08 AM
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Won't start after head unit change.
Hi there, I'm a bit of a noob when it comes to cars, and this weekend I picked up a nice MK1 TT 225.
Today I went to change over the head unit from tape player chorus to my own from my old car, everything seemed to be working great but then all of a sudden the head unit went off and now the car wont fire up?
I'm completely stuck on whats happened, I've checked the engine fuses in the drivers side door, and I've even left the battery off the car for 20 minutes or so to see if that helped.
Every other part of the car works fine I've stuck the original head unit back in and its got the word safe on it I assume its waiting on the radio code going in.
Does anybody have any ideas how I've killed my car and what I can do to get it working again
Today I went to change over the head unit from tape player chorus to my own from my old car, everything seemed to be working great but then all of a sudden the head unit went off and now the car wont fire up?
I'm completely stuck on whats happened, I've checked the engine fuses in the drivers side door, and I've even left the battery off the car for 20 minutes or so to see if that helped.
Every other part of the car works fine I've stuck the original head unit back in and its got the word safe on it I assume its waiting on the radio code going in.
Does anybody have any ideas how I've killed my car and what I can do to get it working again
04-14-2014, 05:20 PM
#2
AudiWorld Super User
Hi there, I'm a bit of a noob when it comes to cars, and this weekend I picked up a nice MK1 TT 225.
Today I went to change over the head unit from tape player chorus to my own from my old car, everything seemed to be working great but then all of a sudden the head unit went off and now the car wont fire up?
I'm completely stuck on whats happened, I've checked the engine fuses in the drivers side door, and I've even left the battery off the car for 20 minutes or so to see if that helped.
Every other part of the car works fine I've stuck the original head unit back in and its got the word safe on it I assume its waiting on the radio code going in.
Does anybody have any ideas how I've killed my car and what I can do to get it working again
Today I went to change over the head unit from tape player chorus to my own from my old car, everything seemed to be working great but then all of a sudden the head unit went off and now the car wont fire up?
I'm completely stuck on whats happened, I've checked the engine fuses in the drivers side door, and I've even left the battery off the car for 20 minutes or so to see if that helped.
Every other part of the car works fine I've stuck the original head unit back in and its got the word safe on it I assume its waiting on the radio code going in.
Does anybody have any ideas how I've killed my car and what I can do to get it working again
For a 1999-2001 TT ,you may have blown the fuse for the ECU as some of the aftermarket harnesses have an problem on the wiring which shorts the diagnostic link to the 12 volt power.
Earlier cars are K-line. Concert I.
2002 is CAN-Bus Concert II and need a mod to the radio harness to make aftermarket head units work.
Pull the radio and harness and see if you can scan it.
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