What should be paid attention to in the maintenance of changan cs95 exhaust emission control system?

● Do not disassemble any parts or connectors in the EFI system at will, so as to avoid moisture, oil pollution and other foreign substances entering the sealed cavity of the connector or causing other damage, which will affect the normal work of the EFI system.

● The control unit is not waterproof, and water is forbidden to enter the ECU when the car is overhauled and cleaned in rainy days.

● Do not install radio antennas and other equipment that may cause wireless interference near ●ECU.

● During fault thermal simulation and other maintenance operations that may increase the temperature, the temperature at the distance of 1cm from the ECU surface should not exceed 105℃.

● Before welding on the car, the ECU must be removed.

● Do not disassemble the tubing easily. Even if the engine is not running, there is high-pressure fuel in the oil circuit. Removal and replacement of oil pipes and fuel filters should be carried out by professionals in a well-ventilated place.

● Release the pressure of the fuel pipe before removing it. Relief method: Remove the fuel pump relay and start the engine to idle until the engine goes out by itself. When disassembling, wrap the tubing joint with a clean towel to absorb the leaked fuel and reduce the fire risk.

● Before loosening the pipe connection position, thoroughly clean the connection position and its area, put the removed parts on a clean mat and cover them, and do not use a fiber rag. If it can't be repaired immediately, it is necessary to seal the open part.

● When the engine is running, it is not allowed to remove the battery connection cable.

● When connecting the battery, the positive and negative poles should not be reversed to avoid damaging electronic components.

● When taking out the electric fuel pump from the fuel tank, please don't energize the pump to avoid sparks.

● The positive and negative poles of the fuel pump power supply cannot be reversed.

● Pull out the fuel injector plug before measuring the cylinder compression pressure.

● When the engine is running, it is forbidden to remove the connecting wire or connector. It is forbidden to detect electrical signals by piercing the insulation of wires.