This volvo CEM module has two versions. I think this one is the newer style, maybe mainly used in the US. The CEM shown also has two 9s12xdt256 chips. This pinout is for the mcu that contains the immobilizer data. The other mcu I believe contains the mileage. I do not have a diagram made for it but the pinout is very similar so you should be able to visually follow the pins to make connections.
