Hello!! During extensive Google research I have repeatedly stumbled on this forum and decided to register and start a thread (total forum noob!). I have got bigger problems with my V70 II(S) Built:2000 D5252T(103kW). A few weeks ago the known error of the DIM (voltage controller def. thus total failure) occurred and was fixed by the electronics expert (EPS) –> vehicle worked again perfectly afterwards. A few weeks later, after a longer period of time, Standing time of the vehicle the following problem: Ignition key plugged in and turned on level I and II –> no reaction (DIM, climate, stay without current). The problem exists since then permanently. VIDA Dice can not establish a connection with the CEM – can therefore unfortunately no error codes attached. As a result the power supply, the CAN bus cables, as well as all fuses and relays were checked by circuit diagram, At the CEM measured (in the respective ignition key positions): 30+ on pin E3 and E6 (12V) ) S to Pin B1 (12V) X to Pin B2 (12V) 15 to Pin B3 (12V) X+ to Pin C1 and B10 (12V) 31- to Pin E1 (transition to ground) At CEM the relay CMI22 is bridged by a jumper, the air conditioning starts and at DIM the only one lights up the engine control light (which indicates intact DIM??). What parameters or input signals does the CEM still need to control the relay CMI22 and to power the control units behind it. Otherwise, it almost looks to me like CEM defek t out..? With the hope of (He) solution… Thank you already in advance..!