Introduction CAN Networking

Introduction

CAN networking

Cayenne model year 2003

CAN 'Controller Area Network' (data processing network)
More and more systems in the vehicle must exchange data and this in turn requires fast and trouble-free data exchange. Control modules for various systems are connected to a 'two-wire network: high/low'. Since the amount of data that can be transferred over a network is limited, the control modules must be connected to several networks.

Three main data busses and one separate CAN data bus are used in the Cayenne. The umbrella term 'CAN data bus', which is used in these instructions to represent the individual 'CAN data busses', must be replaced by the relevant 'CAN data bus, e.g. CAN drive'.

These checking instructions are only relevant for the 'CAN data busses' listed below:
- CAN drive (CAN-C)
- CAN Infotainment
- CAN comfort (CAN-B)

The 'PSM control module' and the 'combination sensor' exchange messages via the 'CAN data bus' mentioned below.
- CAN-internal

'Internal CAN' is a separate CAN data bus that does not have any physical links to the other CAN busses, i.e. 'CAN drive/CAN Infotainment/ CAN comfort'.