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2008 2.0 TFSI (EA113) - No Dedicated Fuel Injector Fuse...?

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#1 ·
09 TTS MK2 EA113 CDLB Australian delivered RHD

Was doing a compression test and wanted to pull the fuel injector fuse

Audi book said no 21 in drivers door fuses but mine was unused, no specific card in that fuse box either to identify the picture attached isn’t my actual fuse box but generic that mine looks exactly like


Removed fuse for fuel pump in engine bay and was able to do test no issues

But wondering do some cars injectors run off engine management fuse rather than direct fuse?


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#2 ·
If you download the wiring diagram(s) for a MK2 the description for Fuse SC21 it is followed by a subscript “1”
And if you look at the notes below the fuse look-up list you see that “1” applies only to BUB & CBRA motors.
 
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#3 ·
Thanks

Do you have a link?

I searched the workshop manual section and couldn’t find it

 
#4 ·
To do a compression test (and this seems to be for most Audis BTW) you're supposed to unplug the injector harness instead of removing a fuse. In the 2.0Ts (both EA113s and EA888s) this is under the intake manifold on the left side (the right side when looking into the engine bay from in front of the car). There's like two connectors there, the large one is the injector harness.
 
#5 ·
TTS;) said:
Do you have a link?
Download: https://www.ttforum.co.uk/attachmen...-locations-a005tt20021-part-6-pdf.479460/?hash=da366556379de360df0aaf46b20e2fdf

Note: The above link is part 6 or 8. File has been broken up into 8 parts due to file size.
See: https://www.ttforum.co.uk/posts/9543868/

You may be able to download the complete file intact from: http://lz7w.com/audi/mk2ttwiki/pdf/erwin/A005TT20021-Wiring_Diagrams_and_Component_Locations.pdf (click the link and then download for 'off-line' storage)
 
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#6 ·
To do a compression test (and this seems to be for most Audis BTW) you're supposed to unplug the injector harness instead of removing a fuse. In the 2.0Ts (both EA113s and EA888s) this is under the intake manifold on the left side (the right side when looking into the engine bay from in front of the car). There's like two connectors there, the large one is the injector harness.
I did mine with just the fuel pump fuse pulled

seemed to work ok and didn’t notice and fuel spraying and car fired up and drove fine after so is unplugging the harness necessary?



Download: https://www.ttforum.co.uk/attachmen...-locations-a005tt20021-part-6-pdf.479460/?hash=da366556379de360df0aaf46b20e2fdf

Note: The above link is part 6 or 8. File has been broken up into 8 parts due to file size.
See: https://www.ttforum.co.uk/posts/9543868/

You may be able to download the complete file intact from: http://lz7w.com/audi/mk2ttwiki/pdf/erwin/A005TT20021-Wiring_Diagrams_and_Component_Locations.pdf (click the link and then download for 'off-line' storage)

Thank you mate will download this
 
#7 ·
I did mine with just the fuel pump fuse pulled

seemed to work ok and didn’t notice and fuel spraying and car fired up and drove fine after so is unplugging the harness necessary?
Well there's a variety of things you can do to do a compression test. If you pull the fuel pump fuse then there's still fuel in the line and the injectors still fire so fuel will go into the cylinder for a bit unless you first run the car until it cuts off due to fuel starvation when there's no more fuel in the line. But yeah that would work too but the injectors will still be firing, which is probably not a huge problem.

But it's the way the service manuals say to do it--unplug the injector harness, nothing else really. On these cars removing the fuel pump fuse will stop the fuel pump from working. Some other cars (like the B8s with the 3-wire controllers) if you pull the fuse for the "fuel pump" that actually doesn't completely stop the fuel pump from operating--it will still provide idle output (indefinitely), but if try to rev higher it will cut out. Obviously there's some other fuse powering the fuel pump somewhere but if you just pull the one in the main box that's for the fuel pump, that's what happens. So unless you either find that fuse or pull the pump connector...the pump runs still somehow, lol. Again though not an issue with a PQ35.

So yeah I guess these are the kind of reasons the s/m describes disconnecting the injector harness rather than other methods, though other ones could work just the same.

This is the s/m section for doing a compression test on a 3.0T s/c engine...only using this one because I happen to have the manual open on my computer right now, lol. But the 2.0Ts should be similar instructions only a different location for the connector of course:
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In any event if you got it done, that's the main thing...I take it the results were all good? 😁
 
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