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ECU is the abbreviation of Electronic Control Unit, also known as on-board computer,
on-board computer, etc. The following is an introduction to ecu:
CU (ElectronicControlUnit) electronic control unit, also known as trip computer, on-board
Like ordinary computers, it is composed of microprocessor (CPU), memory (ROM, RAM),
input/output interface (I/O), analog to digital converter (A/D), shaping, driving and other
large-scale integrated circuits. In a simple word, ECU is the brain of a car.
Composition of ecu:
Similar to ordinary computers, CU is composed of microprocessor (CPU), memory (ROM, RAM),
input/output interface (I u002FO), analog-to-digital converter (A u002FD), shaping, driving and
other large-scale integrated circuits.
Functions of ecu:
It has fault self diagnosis and protection functions. When the system has faults, it can automatically
record fault codes in RAM and take protective measures to read alternative programs from the
above inherent programs to maintain engine operation. At the same time, these fault information
will be displayed on the instrument panel and remain on, so that the owner can find the problem
in time and drive the car to the repair shop.
The symptoms of vehicle ecu failure include:
The vehicle cannot be started; The fuel pump works normally but does not inject fuel; Cold car is easy
to start, but hot car is not easy to start; The electronic components inside the ecu are unstable when heated,
and the idle speed is high or low; The engine stops suddenly when driving or idling; The vehicle stalls
when shifting gears; The key does not work; No fuel injection, no oil pump operation, no ignition;
The scan tool cannot access the system and vehicle detection.
The car ecu refers to the car computer control module, commonly known as the trip computer, which is
generally installed under the driver's dashboard or near the wiper linkage. The function of automobile
ecu is to monitor various data input and various states of automobile operation at any time, and calculate
the information sent by various sensors according to the pre designed program. After processing, it sends
various parameters to relevant actuators to perform various predetermined control functions.
What is the effect of the car ECU broken?
It's easy to start when the car is cold, but it's not easy to start when the car is hot. The electronic components inside the ECU are unstable when heated. One or three cylinders or two or four cylinders (such as four cylinder engine) are missing. In addition to the ignition module failure, the ECU internal program error and the ECU internal pre amplifier failure will cause such a cylinder loss. Idle speed is either high or low, abnormal. ECU internal program error.
What are the symptoms of the broken car ecu?
Function of ECU: Receive the signal from the sensor, analyze it, and then transmit it to the actuator. Commonly known as "automobile computer".
Generally, external short circuit cannot cause ECU damage. ECU is protected internally, even if the pin is inserted incorrectly, it will not cause damage. However, depending on the specific ECU situation, the current ECU protection measures are perfect, except for the weak power supply port. Generally, ECU is easy to be damaged by high voltage, but the general voltage inside the car is not more than 15v, so it is relatively safe.
The danger is that the induced voltage caused by electric welding is sometimes very high, so it is better to remove the ECU when welding on the vehicle. Also, the ECU itself breaks down, mainly due to the quality of the device itself.
When welding and repairing the frame, the ECU wire connection was not disconnected. When welding and repairing the frame, the change of current will produce extremely high induced electromotive force, which will cause harm to ECU through the circuit.
Can I drive the car when the computer board is broken?
The car can still drive if the computer board is burnt out:
1. First, look at the computer board (electronic control module). The most important thing is anti-theft,
engine or power system and gateway, which have little to do with anything else. Secondly, the power
system has a standby (limp home) mode, which can still support driving;
2. Professional organizations can be repaired, but they are usually replaced because the accident rate
may increase after maintenance. The computer board of the car is the ECU of the car;
3. Functions of ECU: supply proper oil according to different driving conditions, adjust ignition angle and
timing, and control various electronic equipment, such as air conditioning system, cooling system and self
4. For a vehicle, ECU is equivalent to the human brain, which is responsible for receiving various signals
and controlling various systems after being judged by the built-in basic program, so as to maintain the
normal running of the vehicle. The trip computer has the function of recording and protection. The trip
computer records the dynamic state of the vehicle in a new film, so that maintenance personnel can call it
at any time. In the event of an accident, It is also convenient to call out the speed, steering and other actions
and information of the car when it is out of control from the computer for people to judge;