Network

Network





To increase driving safety and minimize the number of cables and connectors the X70 has networked communication between the modules for engine control, automatic transmission control, ABS, combined instrument panel control, and electronic throttle control.
The communication between the different components occurs according to a predetermined communication protocol, (VOLCANO).

Comparison between the conventional system and network

Conventional system
In the S/V70 models communication has previously been on the "one signal - one cable" principle which requires a large number of cables between the different control modules/components.

Network
In the network all the modules are parallel connected and all signals which are exchanged between the different modules via 2 twinned cables. This means that all modules have access to all signals, but only use those signals they require, the others are ignored.
By using an electronic throttle module (ETM) there is no need for an idle air control (IAC) valve, and neither is there any need for a separate control module and vacuum motor for the cruise control function.

Several advantages with a network
- Fewer cables give lower weight and less risk of chafing.
- Fewer connections give less risk of loose connections.
- The same modules can be used for many types of car.
- Software can be downloaded when the car is finally put together in the factory , which leads to fewer variations in installation and therefore lower costs.
- Reduced stores at the dealerships (only a few different modules are needed).
- The possibility simply updating the software in the car in case of a problem.
- Easy to adjust the car for the customer and market.
- Easy to install accessories, modules do not need to be removed or added because the accessory software can be downloaded into the existing modules.
- Developed diagnosis for simpler fault-tracing.
- Larger possibility to introduce logical functions, emergency functions for faulty components for example.