Analytical tools for trade diversification

List of contents of this article:

• 1,Analytical tools for trade diversification What should I do if the electronically controlled engine fails?
• 2, Engine ev control system failure?
• 3, What does engine electronic control system failure mean
• 4, How to diagnose and eliminate the faults of the electronically controlled ignition system.
• 5, 6, Common faults and overhaul of engine electronic control system

What should I do if the electronically controlled engine fails?

1. This failure can remove the connector of the gasoline filter inlet pipe during start-up to determine whether the oil is pumped.

2. Fault analysis and maintenance: the reason for this carThe obstacle phenomenon occurs suddenly, and the possibility of mechanical wear is very small. The engine gas distribution mechanism adopts chain transmission, and basically there will be no gas distribution phase disorder.

3. "Oil into water" is a problem with the engine body itself, while "water into oil" is mostly caused by engine accessories, and the nature of the fault is different. Solution: You should go to the repair shop for replacement and repair in time. Analysis of the reason why the oil pressure indicator light will light up when the car accelerates: there are two situations where the oil light is lit: real and virtual.

4. Unscrew the oil return bolt at the rear end of the monomer pump, press the hand oil pump until the diesel comes out, and tighten the bolt. Unscrew the nut connecting any two-cylinder high-pressure oil pipe to the fuel injector (high-pressure connection pipe), drag the engine for about 10S until there are no bubbles in the high-pressure oil pipe, unscrew the high-pressure oil pipe, and try to start the engine again.

5. After confirming the fault location of the electronically controlled engine, retrieve the corresponding fault code, put the car in a pending state, and read the fault code. By reading the fault code, it accurately prompts the fault of the electronically controlled engine of the car, so that the maintenance personnel can know the detailed information of the vehicle fault by scanning the fault code.

6. First of all, check whether the "start-up system" of the car is faulty. If the start-up system fails, the car will definitely not be able to start.

Engine ev control system failure?

1. Confirm the fault: If the engine EV system fails, you need to confirm the performance and specific location of the fault first. For example, problems such as inability to start, shutdown, unstable speed, etc. may occur. These failures may be caused by a variety of reasons and need to be carefully examined and diagnosed.

2. This means that ecu is damaged. ecu is the engine adjustment computer. Ecu is called the brain of the engine. Without ecu, the engine of the car cannot run normally. If the ecu is damaged, it needs to be replaced directly. There are many reasons that affect the damage of ecu, such as water inlet, high temperature, etc.

3. The reason is that a large amount of carbon smoke has accumulated inside dpf. According to the information of Autohome, the failure of the Corolla twin engine hv and ev regeneration system is due to the accumulation of a large amount of carbon smoke inside the dpf, resulting in the problem of blockage.

4. Reasons, for reference only: sensor damage, poor contact or signal interruption; poor engine maintenance; poor quality of fuel and oil; insufficient combustion of mixed gas; spark plug failure, ignition coil failure; fuel pump failure, oil line blockage; air conditioning filter blockage.

What does engine electronic control system failure mean

refers to the damage of the electronic control unit. The electronic control unit is the electronic computer that controls the engine, and the electronic control unit is called the brain of the engine;Without ecu, the engine of the vehicle cannot run smoothly; if the electronic control unit is damaged, it must be replaced immediately.

This means that ecu is damaged. ecu is the control computer of the engine. ecu is called the brain of the engine. Without ecu, the engine of the car cannot operate normally. If the ecu is damaged, it needs to be replaced directly. There are many reasons for the damage of ecu, such as water inlet, high temperature, etc.

This means that ecu is damaged. ecu is the control computer of the engine. If ecu does not have the brain called the engine, ecu, the engine of the car cannot work properly. If ecu is damaged, it needs to be replaced directly. There are many reasons for ecu damage, such as water inlet, high temperature, etc. There are many sensors and actuators around the car engine.

This means that ecu is damaged. ecu is the engine adjustment computer. ecu is called the brain of the engine. Without ecu, the engine of the car cannot run normally. If the ecu is damaged, it needs to be replaced directly. There are many reasons that affect the damage of ecu, such as water inlet, high temperature, etc.

Engine control system failure indicates ecu damage. The causes of this failure are: power supply circuit failure; output power module failure; memory failure; ECU water inlet and moisture failure.

How to diagnose and eliminate the faults of the electronically controlled ignition system.

1. First of all, check whether the "start system" of the car is faulty.If the start-up system fails, the car will definitely not be able to start.

2. Fault analysis: The fault is mainly caused by the misalignment of ignition timing adjustment or ignition angle assembly misalignment. Exclusion method: Connect the ignition tester and adjust the ignition advance angle to the specified value.

3. Maintenance suggestion: check whether the electronic control harness is damaged and the connection is not secure.

4. Elimination method of engine failure caused by ignition system failure: Visual inspection: First, check whether the high-voltage line and low-voltage line on the ignition coil and distributor are loose. If so, start the engine after troubleshooting to see if it can be started; if no problems are found in the visual inspection, continue to the next troubleshooting step.

What are the basic methods of electronically controlled engine fault diagnosis

1. Consultation: Ask the user about the occurrence of the fault, the conditions, the fault phenomenon and whether it has been overhauled. ( 2) Judge and check whether there is a mechanical fault. If it is a mechanical fault, proceed to step (3), otherwise proceed to step (5). ( 3) Repair mechanical faults.

2, %`EyG 3) Check the start-up system, including the ignition switch, start switch, idle start switch and starter, and whether the connection of each line is loose. 1 5heLnei (2) The starter rotates normally, but the engine cannot start E, kDy: 1) call up the fault code.

3. There are two types of instrument diagnosis, one is simple instruments for diagnosis, and the other is to use professional instruments for diagnosis.

4. The fault diagnosis and maintenance methods of the engine electronic control system are as follows: (1) Consultation: ask the user about the situation, conditions, fault phenomenon and whether it has been repaired; (2) Judge and check whether there is a mechanical fault, and if so, repair the mechanical fault; (3) Verify the fault phenomenon after the mechanical fault is eliminated Whether to disappear, if so, end the inspection.

5. Fault consultation. It is inevitable that the electronically controlled engine will fail during use, and in practice, we often discuss maintenance methods around the fault diagnosis process. Consultation is the basis. It is to understand the whole process of fault occurrence and development through the driver's inquiry to obtain relevant information. Lay a good foundation for further diagnosis.

EngineCommon faults and maintenance of the electronic control system

indicates the failure of the engine mechanical system. Most of the reasons for this kind of failure are: serious water leakage in the cooling system; the cylinder pad that separates the water sleeve from the cylinder is washed away; the main valve of the thermosther is falling off; the fan transmission belt is loose or broken; the pump shaft and impeller are loose; and the fan clutch is not working well. Solution: Check the cause of the failure and replace it accordingly.

The circuit break fault is mainly caused by broken wire, poor connector contact and connector terminal plugging and unplugging. Generally, breakages in the middle of the wire rarely occur. The common ones are mainly broken at the connection, so you should pay attention to checking the wires at the sensors and connectors during maintenance.

Common faults include integrated block damage, capacitor failure, loose welding joints, loose fixing bolts, etc., all of these will cause the electronic control system to lose its function or malfunction. For computer failure, professionals should be required to test or read the fault code of the computer damage, determine the location of the fault and repair or replace it in time.

The connection of the plug-in is faulty. There are many plug-ins in the circuit of the electronic control system, which often cause the plug-in to age due to long use, or due to multiple disassembly and installation, the plug-in connector is loose and poor contact, resulting in unstable operation of the engine (sometimes good and sometimes bad).

This method mainly uses engine fault diagnostic instruments and computer decoders for troubleshooting. Four. Self-diagnosis system diagnosis method This method uses the fault self-diagnosis function provided by the engine electronic control system to judge the fault situation of relevant parts.