Quote:
Originally Posted by Mik325tds
...Hello, I'm trying to help a friend who has rebuild his engine (E90 335d) and now gets a DTC in his CAS: A0 C1 64 - KL50L faulty. The starter just clicks but barely moves the engine before being disengaged...
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Not sure what you read that code with, but Terminal 50 (Kl.50) is active during the Start signal to the Starter Solenoid from the CAS. In this TIS circuit diagram, that signal goes from CAS to Starter Solenoid as 12V+ via the Black wire from Pin #22 of Connector X13376 at the CAS to the Starter Solenoid at the Starter Motor, M6510a; NOTE that the wire passes through Connector X6011 in the E-box (2nd link) where you can test it if you can't get to the Solenoid itself (INPA can also test Kl.50 voltage).
It may simply be a failure to properly reconnect wiring between the E-box and Starter Solenoid. Ground Strap??:
https://www.newtis.info/tisv2/a/en/e...system/uXuCNh9
https://www.newtis.info/tisv2/a/en/e90-335d-lim/RY9Z1BC
George