Vehicle control architecture concept

There may be various faults in a car, such as a fault light on the instrument panel, the car being unable to start, strange noises coming from the car, etc.

The vast majority of these faults are diagnosed by one electronic control unit (ECU) after another in the car, which then alarms and alerts the driver through the instrument panel.

This series will specifically introduce the fault diagnosis of automotive ECUs. The core issues include: What are the faults? How does ECU perform fault diagnosis? How to handle the faults? And how to repair the faults?

Vehicle control architecture concept

If you completely disassemble a car, there will be a lot of parts.

If one of these many parts fails or is damaged, it would be very difficult to directly identify the faulty part.

So how can we identify faults accurately and quickly? The above parts can be classified from the perspective of the vehicle's functional system, that is, these parts constitute the various functional systems of the vehicle (power system, chassis system, vehicle system and intelligent driving system, etc.). Each system contains multiple control functions. For example, the power system (for example, new energy vehicles) includes the motor control unit (MCU), battery management system (BMS) and high-voltage distribution unit (PDU), etc., so these parts are further subdivided into various control functional units. Based on these control functional units, the vehicle control architecture is formed, as shown below: