What problems should I pay attention to before the car comes out of warranty?
Matters needing attention before automobile warranty period 1. Inspection of automobile parts in engine compartment.
1. Quality inspection of automobile steering gear
Automobile steering gear is a very easy place to cause oil leakage. Because the automobile steering gear is connected with the steering wheel and steering mechanism of the automobile chassis, it is the main component to control the driving direction of the automobile. Due to long-term use, the oil seal inside the steering gear is very easy to wear and leak oil, which leads to the failure of the steering gear. For a car that has been driving for almost two years or about 60 thousand kilometers, the inspection of the steering gear of the car is the key.
The position of the steering gear is just behind the transmitter. Open the hood of the car and look at the lower part behind the engine. You can see a horizontal tubular part, which is the steering gear.
2. Quality inspection of automobile ABS pump
Automobile ABS pump is the core device to control automobile ABS anti-lock braking. Once the oil leaks, the ABS braking system of the car will lose its function. In this way, once the car brakes suddenly, the car tires will suddenly lock up and lose the steering function. At that time, you had to wait for death.
The main reason for oil leakage of automobile ABS pump is that ABS pump works frequently and parts are overheated. Therefore, in the daily use of cars, it is necessary to avoid slamming on the brakes and slamming on the brakes, and prepare for deceleration in advance. ABS pump must be replaced when it leaks oil.
3. Engine seal quality inspection
When checking whether the engine leaks oil, you must first remove the dust cover (the blue part in the above picture) buckled on the engine, so as to check whether the oil seal on the upper part of the engine leaks oil or water. Many times, the inspection steps of removing this dust cover are ignored, remember.
In short, the main inspection in the engine compartment is to check whether the internal parts of the engine compartment are leaking oil. At the time of inspection, the car owners' friends had better do their own work and be aware of it.
Second, the car chassis inspection
1. Quality inspection of automobile four-wheel shock absorber
Automobile shock absorber is also an automobile part with frequent quality problems and oil leakage. If it leaks oil, the damping effect will be reduced or lost. Seriously affect the feeling and safety of driving. When passing through some bumpy roads, the car is very likely to get out of control, causing rollover and collision. Moreover, the failure of shock absorber is not only found in classic cars, but also in new cars that have just been used soon. Therefore, it is very important to check whether there are quality problems in automobile shock absorbers.
2. Inspection of oil leakage quality of automobile brake cylinder
Automobile brake cylinder is a hydraulic pump installed on the brake disc. Its main function is to act as a brake. It is conceivable that this part of the oil leakage will have serious consequences. If the brakes fail, you can go straight to the underworld.
There are many reasons for oil leakage in brake cylinder. In the use of automobiles, it is necessary to check the brake cylinder frequently. There are brake cylinders on all four brake discs of the car. When checking, you can see it through the wheel hub of the car.
The inspection before the automobile comes out of warranty shall be carried out according to the maintenance interval project of 10000 km.
According to the maintenance process, I will call the 4S shop first to make an appointment for after-sale. After driving to the store, I asked the after-sales staff about the vehicle inspection before the end of the warranty period, and the answer was: there is no inspection specifically for the upcoming warranty period, but the vehicle will be inspected in detail according to the maintenance interval of 10000 km.
First, carry out routine maintenance items, such as oil change and mechanical filtration.
Before the detailed inspection, the maintenance technician will complete the routine maintenance items of the vehicle? My colleague's car mileage is close to 40 thousand kilometers. According to the maintenance interval, the maintenance node has been reached.
Second, vehicle inspection: focus on inspection of items related to driving safety.
The vehicle inspection is carried out with the cooperation of two maintenance technicians. Before starting the inspection, two technicians will take necessary cleaning measures for the vehicle according to the operating specifications.
After completing the preparation of protective measures, the service technician will start the inspection from the outside of the vehicle.
1. Check the working conditions of wiper, lighting and reversing radar.
The maintenance technician first checks three items: wiper, light and reversing radar. These three items are closely related to vehicle safety, especially at night and in bad weather, it is necessary to ensure the working state of wipers and headlights.
The lighting inspection of the whole vehicle is carried out with the cooperation of two technicians: one technician stands in front of the vehicle and the other technician in the vehicle is guided to turn on the corresponding lights with standard gestures.
2. Check the engine compartment project.
The engine compartment also needs careful inspection. The inspection items include the inventory of various oils, wire harness condition, battery condition, air filter condition, etc.
3. Check the chassis condition of the vehicle.
After completing the first two steps of inspection, the maintenance technician lifts the vehicle and continues to check the chassis condition of the vehicle. The inspection of vehicle chassis is mainly to check whether there is oil leakage and component damage.
4, vehicle tire inspection
Tire condition directly affects driving safety, so tire inspection must be careful. Two maintenance technicians are responsible for the tires on the left and right sides of the vehicle respectively. The inspection is mainly to find out hidden dangers and measure tire pressure.
5. Inspection of brake system components
The service technician also needs to check the braking system of the vehicle before replacing the removed wheels.
Because the owner usually loves his car and the car is in good condition, the inspection is over after the maintenance technician completes the above process steps. I looked at the time, about two hours. Fortunately, there were not many cars that went to the store for maintenance that day, and I arrived at the store earlier. Otherwise, counting the time in line, it is estimated that it will not escape for three or four hours.
What if the inspection finds problems? Go through the claim formalities as soon as possible.
Is it really necessary to conduct a comprehensive inspection of the vehicle before the warranty period expires? In case there is a problem with the vehicle parts or a part of the assembly, and the parts with problems are still under warranty, we can claim compensation before the end of the vehicle warranty period and enjoy the manufacturer's warranty service.
Conclusion: Through practical experience, we know? Check the car before the warranty expires? It is not a service item in the after-sales service of the manufacturer, but can actually be equivalent to the conventional comprehensive vehicle inspection service. However, before the end of the vehicle warranty period, it is necessary for us to conduct a comprehensive inspection of the vehicle, find out the problems that can still enjoy the manufacturer's warranty service in time, and claim for compensation as soon as possible; Give the car once in combination with routine regular maintenance items? Great health care You can keep your car in good condition.
Four maintenance methods for automobile maintenance personnel: 1. From simple to difficult.
When the car drives into the garage, we can learn about the faults that need to be eliminated from the maintenance. For example: the engine fault light is on, the idle speed is unstable, black smoke is emitted, the refueling is weak, the automatic gear does not upshift, and the gear slips. We can choose the simpler solution. When this problem is solved, other problems will be solved.
Example: a Jielong car, the engine failure light is on, emitting black smoke, the engine is easy to turn off, it is difficult to start after turning off, and the odometer pointer is disordered.
Because it is simple and targeted to retrieve the engine fault code, we will take this as a breakthrough. Call engine fault code: 1) Throttle position sensor fault. 2) Water temperature sensor failure. 3) The main computer is out of order.
First, check the throttle position sensor, unplug the sensor, and measure the change value of throttle opening with a multimeter, which meets the standard value and has no fluctuation value, indicating that the sensor is fault-free. I also measured the wire harness from the sensor to the computer and found that the resistance value was large. So clean up the wiring, strip off the main wiring harness section by section until the main plug at the left rear of the engine room, and find traces of wear on the wiring harness. When the wire assembly line was removed, it was found that several wires were worn out. Clean the wiring harness, load the car, clear the fault code, and try it out. The above faults disappear.
Because the car has been repaired in other repair shops, but the effect is not ideal, so we use the right method to solve the problem quickly, accurately and economically.
Second, the separation method
This method is a component that controls or protects several other working components. When one of the workpieces fails, it will affect the control part and cause other workpieces to fail to work normally. When the control part fails, we don't know which working part fails. Let one of the workpieces not work first. If the control works normally with other workpieces, the workpiece is damaged.
For example, a Mercedes-Benz 320 car sometimes has no air conditioning, the fan doesn't work, and the 2 1 insurance is often burned.
From the insurance description, we know that the insurance controls the power line of the fan speed regulating resistor, controls the wiper and provides one of the power lines of the air conditioner. So unplug the fan speed regulating resistor first, or burn out the insurance; Unplug the automatic air conditioning computer and burn the insurance; So we unplugged the wiper plug, because the power cord is mainly used to provide the live wire for the wiper nozzle sensor. When pulling the plug, we found that the harness between the hood bracket and the nozzle was loose. When the hood is closed, the wire harness is clamped by the engine bracket and grounded. After correct handling, the fault was solved.
This method is also suitable for the maintenance of automatic transmission, when one or two gears have problems. We can test the oil pressure and stall point of each gear before disassembling the automatic gear, and then compare the direction of the oil circuit to find the problem.
In addition, according to the unified regulations of international automobile manufacturing industry, cars after 2000 will adopt CAN bus system. Using the separation method will be of great help to help us deal with future vehicle failures.
Third, step by step.
This method is to use what we have learned and all kinds of testing equipment to find faults step by step. This method is often used for some soft faults and intractable diseases.
Example: A Mitsubishi V6 car, with the maximum speed of 3000r/min. Let's first check the ignition system, replace the spark plug and measure the high-voltage line, which meets the standard value. Clean the gasoline filter and test whether the oil pressure of the oil pump is normal. Clean the fuel injector. Clean the throttle intake manifold space mechanism to ensure the normal intake system. But the problem has never been solved. The test instrument retrieved the engine fault code, but no fault code was output. The main sensors are detected by oscilloscope and meet the standard values. Explain that the circuit system is normal. Check whether the ignition timing and cylinder pressure are normal. Among several major systems, only the exhaust system has not been checked. So the muffler was removed, and the oil was refueled smoothly, and the fault phenomenon disappeared.
The exhaust pressure of muffler is often ignored by us. In vehicles equipped with electronic fuel injection system, muffler is equipped with three-way catalyst. After a long time, there will be blockage, which will lead to too high exhaust pressure, poor engine refueling and too high temperature. This kind of fault often occurs in Mercedes-Benz, BMW, Daewoo and Hyundai.
Fourth, the inverse method