Quote:
Originally Posted by SwissXC90
If the CEM is refusing to communicate, then check
Power to CEM
CEM ground
CEM can bus connection
CEM Odbii can bus connection.
|
As I found on 2009 XC90 manual, CEM power pins are B2,B16,B24,C4,C25.
Acc+ pins C9,B25,B11.
GnD pins B5,D6.
Please correct me if im missing something 🙂
Wiring from CEM to OBD2 is ok.
CAN connections from CEM to HS CAN modules are ok.
Quote:
Originally Posted by Clan
In addition you can measure DC voltage on the 2 CAN wires , the low should be around 2.2v and the High 2.8 v depending on activity on the network .
|
Voltage measuring is not the best choice in this case 😀 because voltmeter shows normal CAN voltage, but osciloscope shows literally DC voltage with some weird pulses and not a CAN like signal.