Nuje
Top Post Dawg
- Joined
- Feb 11, 2005
- Location
- Island near Vancouver
- TDI
- 2002 Golf 6MT; 2015 Sportwagen 6MT; 2016 A3 e-tron 6DSG
With VCDS, you can log MB 11 and watch the boost level and see what happens to it when the power drops - should go from like ~2000kpa to suddenly around 1000kpa.
(Important note: the following is how you check on an ALH; not sure if it all applies to the BEW, but I'm pretty sure it does.)
To check the vanes, gotta get under the car and with VCDS, you can use BASIC SETTINGS or OUTPUT TESTS or maybe ADAPTATIONS (sorry - can't remember), to check "charge pressure control". The car then cycles between turbo "on" and "off", with vacuum "pressure" pulling actuator arm. You have to go under the car and look at it - should move super-smoothly in both directions; if there's any stuttering - that's the vanes sticking.
Also connect a MityVac to the vacuum line going to the turbo and see if it holds vacuum - pump it up to 20"Hg and it should hold there for half a minute at least without budging. If it starts dropping, either there's a hole in the vacuum line or the actuator is faulty.
Edit: Probably better explanation of the OUTPUT TESTS here:
forums.tdiclub.com
(Important note: the following is how you check on an ALH; not sure if it all applies to the BEW, but I'm pretty sure it does.)
To check the vanes, gotta get under the car and with VCDS, you can use BASIC SETTINGS or OUTPUT TESTS or maybe ADAPTATIONS (sorry - can't remember), to check "charge pressure control". The car then cycles between turbo "on" and "off", with vacuum "pressure" pulling actuator arm. You have to go under the car and look at it - should move super-smoothly in both directions; if there's any stuttering - that's the vanes sticking.
Also connect a MityVac to the vacuum line going to the turbo and see if it holds vacuum - pump it up to 20"Hg and it should hold there for half a minute at least without budging. If it starts dropping, either there's a hole in the vacuum line or the actuator is faulty.
Edit: Probably better explanation of the OUTPUT TESTS here:
test N75 > VCDS > Measuring Blocks > Switch to basic Settings > "Greyed Out"
test N75 > VCDS > Measuring Blocks > Switch to basic Settings > "Greyed Out" I want to test turbo actuator function by getting VCDS cycle the N75 valve. I *think* I need to go here: Select Control Module > 01-Engine > Measuring Blocks > Switch to basic Settings But "Switch to basic Settings"...
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