Problem with Peugeot 206 1.6 16V

Hello nececito people if someone can help me I have a Peugeot 206 1.6 16V that has a communication problem between the BSI and the Compu and the Can network. They know about some manual or detailed plane of the computer and BSI to check the cables, the car had a clash and there did not walk more, I sent the BSI virgin but the same communication fault errors follows, those who repaired the BSI tell me that it must be a cut cable but I have not well detailed the disposition of the Pins of the BSI. I hope you can help me thanks

They reactivated the inertia sensor? This same works to cut the fuel supply during a.