Will the ECU record when the engine fault light is on

It will be recorded, and this phenomenon should be caused by the wrong signal of the oxygen sensor. It is a problem with the ratio of oil and gas distribution. If it occurs once in a while, it is not a big problem, and if it occurs in the future, it is necessary to find the cause of the failure in time and solve it.

The control principle of the engine ECU: First of all, the working state of our engine is a closed-loop control: the working law of the engine is set through a fixed program (air-fuel ratio and ignition timing under different working conditions).

Then add an oxygen sensor to the exhaust pipe, and use the oxygen sensor to judge the working status of the engine, whether the oil volume is more or less; Add a knock sensor to the cylinder to determine whether the ignition timing is advanced or delayed; The water temperature sensor can determine whether the temperature of the engine combustion chamber is normal to correct the fuel supply, protect the engine, and so on. These conditions are sent to the ECU, which then continuously adjusts the amount of fuel injected and the ignition timing based on their feedback.

The ECU collects information on the working status of each part of the engine through various sensors (including temperature sensors, pressure sensors, rotation sensors, flow sensors, position sensors, oxygen sensors, knock sensors, etc.), and sends it to the ECU by the line responsible for transmission. After the ECU receives these signals, it will analyze various signals, and then it will know what kind of state the engine parts are in and how they are operating, and then automatically calculate which actuators should be allowed to do what things in this state according to the pre-written program, and then send instructions to the actuators, and command the executors to work.

ECU's fault management records the fault condition.

The ECU light is on the vehicle driving computer out of the ** error prompt.

ECUs are typically equipped with fault self-diagnosis and protection, and when a system fails, it automatically records the fault in the RAM** and uses protective measures to read alternative programs from the aforementioned inherent programs to keep the engine running. At the same time, these fault information will be displayed on the dashboard and remain inextinguished, so that the owner can detect the problem in time and drive the car to the repair shop.

What happens if a car ECU fails? If the ECU of the car is damaged, the symptoms will be the inability to start the car, the inability to refuel the LUXO, the injectors not working properly, in addition to the faulty circuit, the ECU can only be repaired after confirming that the external circuit is normal. Verify that there are no signs of damage on the outside of the ECU, that it is securely fastened, and that the welder (adhesive.

whether it is reliably sealed when sealed; In particular, check the connection of the cable plug, when the car ECU engine is running, the positive and negative poles of the battery are suddenly disconnected.

In this case, the circuit will generate a highly induced electrical force, which may cause the electronic components within the ECU to separate. Engine operation is controlled by a motor computer (i.e., ECU); EC usually refers to the burning of amplifier circuit components, sometimes accompanied by the burning of steel strips covering the circuit board. For example, after the American Chevrolet FOI is updated and painted, it is found that the engine cannot be opened, and if the FOI key is opened to control the engine air intake, for example, the ECU of the car is faulty, it may be due to poor heat dissipation affecting the combustion of the circuit board, water flow affecting the burning of the circuit board, or a component on the circuit board is faulty.

Because the car is brushed with the data of the start switch under the car, when the circuit at the output of the ECU is short-circuited, that is, the fifth fault. "No energy output" refers to a stable operating state with no load (no external energy output), and your technical conditions must change to a certain extent. So, what changes are normal?

What changes are failsafe however, the ECU is unable to identify information errors within the range, so there is no fault file. Type Analysis: Gas flow sensors are very useful for gas testing.

The vehicle's ECU may have a malfunction issue, which can be caused by poor heat dissipation that affects the burning of the circuit board, the flow of water that affects the burning of the circuit board, or the failure of components on the circuit board.

The next step is the fault indicator: check whether the fault indicator indicates whether the ECU is connected or not. Normally, plug in and then close.

Common Fault Description: The fault ** can be cleared, but once the key is opened, the VAI fault reappears. The real flaw lies in the sports car that is on the move.

Modern electronically controlled vehicles are fail-safe. When the sensor signal fails.

The ECU light is mostly an error prompt from the on-board driving computer, and the corresponding engine fault is found according to the prompt, and then the code can be cleared. There is also a possibility that the ECU itself has an error, so it needs to be repaired and upgraded.

ECU, the full name of "electronic control unit", that is, electronic control unit, in short, is the on-board computer. Nowadays, many car engines mostly use electronic fuel injection systems, which have a control element that resembles a square box called "ECU", simply put, ECU is composed of a microcomputer and peripheral circuits. A microcomputer is a unit that integrates a microprocessor (CPU), memory, and input and output interfaces on a single chip.

Is it the engine fault light on?

In general, don't take your computer lightly. In principle, the fault light is on and the fault is read by a decoder, and then the problem is eliminated one by one. There are two types of computer malfunctions.

First of all, the decoder can read computer failures directly. The second is that the decoder cannot read the fault code at all, and the data from the decoder is used to conduct a comprehensive test on him. If all the data clutter really doesn't match, then draw conclusions, because computers are generally not prone to problems.

ECU failure shows that the engine electronic control unit is generally reliable and the failure rate is very low. But with the car's mileage ( check price |Detailed explanation of the model) and the increase of service life, there will be individual manifolds aging damage, resistance capacitor failure, fixed foot bolt loosening, electronic components welding leg joint loosening and other faults, resulting in ECU control function failure or poor control system work, resulting in engine start difficulty, idle instability, poor power, increased fuel consumption, emissions exceeding the standard.

There are a few important points that must be paid attention to before the ECU overhaul: Carefully check the external circuit, eliminate the fault of the external circuit, and confirm that the external circuit is normal. Check whether there are traces of damage on the outside of the ECU, whether the fixation is firm, and whether the welding spike denade tin is sealed reliably; Check that the cable is plugged in, especially whether the power cord and tie iron are normal. Confirm the ECU model used by the system.