VAG-COM Discussion

Can I run the leak detection pump with version 311?

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Old Aug 13, 2011 | 10:42 AM
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Default Can I run the leak detection pump with version 311?

My '99 1.8T (Passat) throws an insufficient vacuum code (16825), and I'd like to test run the LDP if there is a way. In group 071 I can see the reed contact status change from open to closed when starting the engine, but the test aborts. Can I run this thing with the engine off? I don't see any output tests for that.
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Old Aug 15, 2011 | 01:06 AM
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VAG-COM 311/409 are no longer supported, a free update to VCDS-Lite is available to registered customers as well as non-customers. Obviously you will need a license/activation to run a basic setting.

http://www.ross-tech.com/vcds-lite/download/index.html
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Old Aug 15, 2011 | 10:47 AM
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I do have a licenced copy of -311, and can run basic settings. So can that version operate the LDP? Can VCDS-Lite do it? If -311 can't, and VCDS-Lite can, is the licence transferable? By the way, I may (hope) to have found a couple of loose clamps that could have caused leaks.

By the way, what was the basic difference between -311 and -409?
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Old Aug 21, 2011 | 06:40 PM
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Originally Posted by turbo510
I do have a licenced copy of -311, and can run basic settings. So can that version operate the LDP? Can VCDS-Lite do it? If -311 can't, and VCDS-Lite can, is the licence transferable? By the way, I may (hope) to have found a couple of loose clamps that could have caused leaks.
Depending on the specific 1.8T this ECM may or may not support a LDP output test. The repair manual should include this information in this case. Since the fault is specific to insufficient vacuum it would be best to check the vacuum at the LDP rather that rely on Key On, Engine Off results.

See the page linked above:
Note to registered users upgrading from older versions:
* If you're upgrading from an older version such as VAG-COM version 311 or 409, you will need a new activation.
** First, install the VCDS-Lite and test it thoroughly in shareware mode as described above.
** Then go here and fill out the appropriate form - or buy a license if you don't have one yet.
If you purchased a SWL from us in the past, you will choose:

If you're using VCDS-Lite and already have a license (even for an old version of VAG-COM)

* Click here to request an activation for VCDS-Lite.

Originally Posted by turbo510
By the way, what was the basic difference between -311 and -409?
See the Revision History for Major Releases page.
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