First adaptation of the boost pressure controller (Solution)

Hello,

"The wastegate actuator for my 2012 A5 1.8 TFSI is defective (a gear inside the actuator is broken)." The EPC light is always on.

Okay, I've replaced the electric motor, and the car is driving normally again. But the EPC light is still on?
Sure, I can help with that. Please provide the German text you would like me to translate into English.

In a manual, I read that the actuator motor needs to be calibrated.
There is also a function for "initial adaptation of the boost pressure sensor" in VCDS, but when I run it, I only get the message "Aborted (for security reasons)".

Is it possible to calibrate the actuator motor using VCDS? Or what steps are involved?

Best, Mike.

Quote:

Friday, April 27, 2018, 12:48:05:28738 VCDS version: RKS 18.2.1 is running on Windows 7 x64. Address 01: Engine Control Module Label file: 06L-906-264-CJE.clb Control unit part number: 8K0 906 264. Hardware: 8K0 906 264. Component and/or version: 1.8l R4 TFSI H06 0008 Encoding: 1A190032232401022000 Operating number: WSC 06324 000 00000 ASAM Dataset: EV_ECM18TFS0218K0906264 002007 (AU4

ROD: EV_ECM18TFS0218K0906264.rod
VCID: 6ED7ADC7B1E74734C3-803A
Sure, here is the translation of the text from German to English:

"1 error found:"

14846 - Positioning device for turbocharger pressure regulators.
P2563 00 [039] - implausible signal.
unconfirmed - checked since last deletion.
Environmental conditions:
Error status: 00000001
Error priority: 2
Error frequency: 1
Mileage: 179,617 km
Date: 2018.04.27
Time: 12:46:53

Motor speed: 0.00 rpm.
Normalized load value: 0.0%
Vehicle speed: 0 km/h
Coolant temperature: 47 °C
Intake air temperature: 18 °C
Atmospheric pressure: 980 millibars.
Voltage at terminal 30: 12.148 V.
Lost count after OBD: 40
Status Default setting Turbocharger control valve - LV_BPA_AD_REQ[0]: 00000001
Boost pressure control valve, raw voltage, sensor - VP_BPA[0]: 4.5264 V
Charge pressure control valve position: Target value - POSN_SP_BPA[0]: -0.00 %.
Charge pressure control valve position: Actual value - POSN_BPA[0]: -0.946 %
Charge pressure control valve control, duty cycle PWM_BPA[0]: -22.775 %.
Charge pressure control valve Voltage: Position closed - VP_BPA_AD_BOL[0]: 4.4882 V
STATE_BPA[0]: AD


Readiness: 1110 0001
http://shop.dieselschrauber.org/en

Hello,

Did the engine run during the failed adaptation process?

Best regards, Rainer.

Hello,

I first tried it with the engine turned off, and then with the engine running.

However, I received the same error message both times.

Sure, here's the translation:

"Best regards," or "Sincerely,"

Good morning.

Too bad, I thought it might be related to the running engine.

Let me see if I can find out more about that. Have you already tested the other two points: "Testing the boost pressure sensor" and "Checking the end-stop positions of the turbocharger"?

Best regards, Rainer.

Make sure that no error codes are cleared during this diagnostic session, as some...
Engine control units will not allow basic settings to be made until the connection to the engine control unit is closed.
Turn off the engine and wait 30 seconds before trying again.

Dana wrote:

First [IDE00754*] test the throttle adjustment (check the (Testing the throttle valve adaptation). Assuming this works, and the control unit is error-free (it's unclear whether the mentioned error code falls under this), the following Turbo tests: 1) [*IDE03869*] Test: Turbocharger boost pressure control (test of the... (Boost pressure regulator) 2) [*IDE04304*] Initial adjustment of the turbocharger boost pressure. (Initial adaptation of the boost controller) 3) [*IDE04325*] Position test of the limit switches for the boost pressure drive. (End-stop position check of the boost pressure control valve) I appreciate this, but I have the impression that "1" is just one functionality. Self-test. I believe that 2 is the actual self-calibration setting for new parts and... 3 likely refers to the end-stop-specific calibration or self-test. It doesn't hurt to use them in any order, but I would choose 2. followed by 3, when I calibrated a new turbo.

Okay, I would like feedback!

Best regards, Rainer.

Thank you for the suggestions, but unfortunately, I still haven't been able to perform the calibration. I'm always getting the above-mentioned error.

However, I was able to work around the problem by mechanically adjusting the position of the actuator (using the adjustment screw) until the end position of the old actuator was reached. The stored end positions can be displayed in VCDS, as well as the current actual value of the actuator motor.

Thank you and best regards.

Hello,

Great idea and solution!

Best regards, Rainer.