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post #1 of 98 Old 03-10-2019 Thread Starter
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Camshaft position sender

My '03 Touareg is the 7LA model
With a VR6 3.2L petrol AZZ engine

If i take out the inlet camshaft position hall sender G40

And make shure that it remains connected to
earth (T121a/ 108 at J220 Motronic control unit),
power supply (T121a/ 98 at J220 Motronic control unit) and
signal (T121a/ 86 at J220 Motronic control unit) wires
Arranging that i can probe the wires with a multimeter

With the ignition on, in normal conditions and with a fully loaded battery, does anyone know the voltage i should read

Between earth and power supply
Between earth and signal wire in rest
Between earth and signal wire while metal in front of the hall sender

Please rescue me
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post #2 of 98 Old 03-10-2019
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I have the same engine.
What are your symptoms?

here is a vid of how to check the sensors:

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post #3 of 98 Old 03-10-2019
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post #4 of 98 Old 03-10-2019 Thread Starter
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Hi TRespect,

Is this test VR6 specific?
Because different engines = different voltages and difference in pull or drop
I'll have to wach the vid some more times

Also i have not many electronical devices, thats why i would like to start measuring using the ECU at first
This is how i have set it up, hoping i could start easy


Problem started out as longer cranking and has evolved to a no start
I can smell that engine gets petrol and from time to time he gives a little puf as if he wants to start
G40, G163 and G28 i replaced
All codes i get have to do with camshaft position sensors
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post #6 of 98 Old 03-10-2019 Thread Starter
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Sorry, trying to to get to know how to use the forum
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post #7 of 98 Old 03-10-2019
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Might be fuel pump issue also. Try this:
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post #8 of 98 Old 03-10-2019
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Quote:
Originally Posted by PatTouareg View Post
Hi TRespect,

Is this test VR6 specific?
Because different engines = different voltages and difference in pull or drop
Apparently these sensors are all alike. But not sure.

Quote:
Originally Posted by PatTouareg View Post
All codes i get have to do with camshaft position sensors
If the sensors are new so you're good there?
You need to post a vcds autoscan.
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post #9 of 98 Old 4 Weeks Ago Thread Starter
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I will make and post a new scan asap!
Wouldn't there be detailed info to be found about what voltages the ECU sends to the switches and what change in voltage the signal wire makes when the switch switches?
Would be so simple and fast to check ...
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post #10 of 98 Old 4 Weeks Ago
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I think you can see the voltage in a vcds log but I don't know what the exact measuring blocks are for the VR6.
Check here and log all the block:

https://www.ross-tech.com/vag-com/m_blocks/090-098.html
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