N55 Valvetronic Run In ABL Procedure Fails AFTER Replacing Servomotor and Eccentric Shaft - SOLVED

In this video, we show how a damaged negative chassis ground strap prevented us from successfully completing the Valvetronic Run-In ABL on ISTA. After completing a mechanical repair for worn out valvetronic components, the intake procedure would fail every time causing multiple faults with the valvetronic system. When testing the motor, harness, and ISM module, no clear fault was found. This led us to believe that there could have been a programming issue or physical issue with the DME. Before we condemned the computer, we decided to test the engine ground by hooking up jumper cables between the chassis and the engine. After doing this, our problem was nailed down and we located the damaged ground strap. This was different to us, as the codes were almost entirely focused on Valvetronic and would not appear until the Run-In ABL was attempted and ultimately failed causing valvetronic emergency operation and subsequent codes. From our past experience, bad ground straps have led to codes across the vehicle, caused no-start conditions, and many codes from the DME from multiple engine systems. Usually it’s fairly easy to diagnose a bad ground, but this issue reminded us that that’s not necessarily always the case. Happy to have this solved and to share it with you guys! If you have any questions regarding this job, ask us in the comments below and we'll happily answer them as soon as possible. This video was filmed on a 2015 F15 X5 35i XDRIVE with an N55 ASSOCIATED CODES: 002D41 - Valvetronic, adjustment range: Master adaptation outside tolerances 135808 - Electrical malfunction, valvetronic servomotor position sensors 135B11 - Valvetronic servomotor activation volt phase: Circuit Open This video is for entertainment purposes only. We are not responsible for any damage to your vehicle. Welcome to BavhausTV!