Citroen C5 Aircross Quiz
Multiplexing

Multiplex network architecture

In this manual: Multiplexing
AAS - Parking Aid — 8Owner's Manual Citroën C5 II — 139Citroen C5 Aircross (2017- 2024) - Owner's Manual — 143Audio system — 14Overspeed control — 7Multifunction display — 4Driver information instrument cluster — 20Navigation assistance — 8Intruder alarm — 7Mechanical specifications — 9Power supply — 8Electrical equipment — 13Lighting and electrical equipment — 3Immobiliser — 4Sunroof — 10Exterior lighting / signalling — 38Multiplexing — 7Air conditioning — 7Body — 6General specifications — 9Automatic gearbox control — 3Exterior mirrors — 10Airbags — 5Defrost — 6Underinflation — 6Interior lighting — 4Wipers / Washers — 6Window lifters — 11Cooling — 8Opening management — 7Cruise control — 5Suspension — 4Grip management — 1Paint — 2Exterior lighting control — 1Indicators (turn signals) — 1Automatic lighting systems - General recommendations — 1Wiper control — 1Special position of the front wipers — 1
~2min read

GENERAL

The vehicle is equipped with 4 multiplex networks, each operating in a specific environment. The multiplexed networks are managed by a central control unit, the BSI (Intelligent Servitude Unit).

CAN NETWORK

Characteristics of the CAN network

The CAN network manages all the control units of the powertrain. Information transmission is much faster than on the VAN networks. As the CAN network manages the braking system and the suspension, its speed allows the vehicle to react over a short distance, regardless of road conditions. The fast processing of information on the CAN network is therefore a guarantee of safety.

The CAN network is a so-called “multi-master” network, in which each control unit continuously broadcasts information, which is received by the other control units that need it. 250 kbits/s.

Note: CAN stands for “Controller Area Network”.

CAN network architecture

Architecture du réseau CAN
 Implantation des calculateurs

Location of control units

Implantation des calculateurs
Location of control units

VAN BODY 1 NETWORK

Characteristics of the VAN Body 1 network

The VAN Body 1 network is described as the “safety network”, as it manages the airbag system as well as the BSM (Engine Servitude Unit), which integrates the vehicle's power electrical controls.

The small number of control units on this network allows fast communication between them, which enables precise airbag deployment in the event of a collision.

The VAN Body network is a so-called “master-slave” network. The BSI sends requests to each control unit connected to the VAN Body network. 62,5 kbits/s.

Note: VAN stands for “Vehicle Area Network”.

VAN Body 1 network architecture

Architecture du réseau VAN Carrosserie 1
 Implantation des calculateurs

Location of control units

 Implantation des calculateurs

VAN BODY 2 NETWORK

Characteristics of the VAN Body 2 network

The VAN Body 2 network manages vehicle security, including the openings and the anti-theft alarm. 62,5 kbits/s

VAN Body 2 network architecture

Architecture du réseau VAN Carrosserie 2
VAN Body 2 network architecture

Implantation des calculateurs

Location of control units

Implantation des calculateurs
Location of control units

VAN COMFORT NETWORK

Characteristics of the VAN Comfort network

The VAN Comfort network manages comfort functions, driver information and driving assistance. 125 kbits/s

VAN Comfort architecture

Architecture du réseau VAN Confort
VAN Comfort architecture

Implantation des calculateurs

Location of control units

Implantation des calculateurs
Location of control units

Test yourself

A quick Citroen C5 Aircross quiz: every answer comes with an explanation and a link to the manual page.