Hello,
I've replaced my gt1549v with gtb1752v from 520d e60. It has hella controller no. 6NW008412. Whatever I do to the n75 maps it doesn't boost at all. After driving for 30-45 seconds the ecu self adjusts and then it starts doing boost at 2800 to 4300 rpms with duty cycle of 31%. I suppose my pwm frequency is wrong, i know the actuator works at 300hz but I'm not sure... also I don't know the frequency the n75 electrovalve is using.
Does anyone know the address of the pwm frequency for n75? I've attached my ori.

frequency is right... ecu sends 300hz, same as actuator need.. does anyone know how to invert the pwm signal for the n75?