It is estimated that in the year 2000, a top of the range vehicle could be fitted with 20 to 40 ECUs
The first stage which will enable the volume and complexity of the harnesses to be reduced consists of grouping several electronic functions in a single ECU
Fewer ECUs = fewer wires
Examples of integration
- The injection ECUs (management of the injection, the ignition, the emission control system, then of the engine cooling etc.)
- The 806 passenger compartment protection unit (management of the locking, the unlocking, the deadlocking, the alarm, the courtesy light and the electronic engine immobiliser)
- The 206 built-in systems interface (management of the same functions as the protection unit as well as of the wipers, the direction indicators, the buzzers etc.)
(A) блок сигнализации
(B) модуль реле
(C) модуль предохранителей
(D) плафон
(E) locking/deadlocking ECU
(F) интеллектуальный коммутационный блок (BSI)
The integration of the electrical and electronic functions in a single ECU makes it possible to improve
- User comfort (more functions managed by a single ECU)
- Energy management to save the battery
- Fault-finding by means of ECU autodiagnostics
This first step enables the number of ECUs to be reduced significantly but not a sufficient reduction in the volume of harnesses