What are the general maintenance diagnostic steps when diagnosing a vehicle with electronic assistan

EPS-ECU calculates the best steering power torque according to parameters such as vehicle speed, steering torque and steering angle, and controls the power assist motor to work to achieve the best steering power assist When A1 has signal input, VT3 is on, VT3 is on, the base of VT2 can be hit by R2, VT2 is also on, at this time, the positive charge is from above, through VT2, and then through the motor (VT4 is not on), and finally from VT3, the motor is forward, such as the red arrow. When A2 has a signal input, VT4 is turned on, the base of VT1 is ironed, VT1 is on, the positive current is passed through VT1 to the motor, and finally VT4 is ironed, and the motor is reversed, such as the blue arrow. <>

The failure of the electronic power assist system, in addition to the failure of the mechanical part, the failure of the electronic part is additional. Such as steering angle sensor failure, motor damage, control module damage, etc. <>

When diagnosing a vehicle with electronic assistance, we should first read the fault code, and then repair it according to the fault code, and the electronic fault is mostly a corner sensor failure.

One thing you should pay attention to when repairing is that after the repair (removing the battery head, replacing the sensor, controller, etc.), it needs to be matched before it can be used normally. Otherwise, a fault code will be reported, such as the unreliable signal of the steering angle sensor. <>

The steering wheel is straightened (the front wheels are in a straight line); Start the engine; Turn the steering wheel about 10° to the left, pause for 2 seconds, and return to the right, then turn about 10° to the right, pause for 2 seconds, and return to the right.

Take your hands off the steering wheel, pause for 2 seconds, then hit the steering wheel to the left to the end, pause for 2 seconds, and then hit the right to the end, pause for 2 seconds, and return to the right; Turn off the ignition.

After the steering position sensor is matched, it must be read and cleared before the setting can be completed.

You should find the fault information first, and then use tools to repair it.

Initially determine that it is not a circuit problem, and then check the vehicle.

Read the fault code first, and then repair it according to the fault code, and the electronic fault is mostly the corner sensor failure.

Read the fault code first, and then repair it according to the fault code.

Provide fault information to assist maintenance personnel to find faults.

Preliminary estimation of the cause of the failure, search for fault information, remove the battery head, replace the sensor, controller.

Initially estimate the cause of the failure and then resolve it.

The fault code should be read first, and then the repair should be carried out according to the fault code.

You can go to the local forum to consult, how much is the specific cost, you can make a reference one, or you can go to an ordinary repair shop to consult first.

Change the tube note [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello! In this case, the steering machine is faulty.

Hello! According to the phenomenon you described, there are two common reasons for the occurrence of this situation in the Suoba electronic power assist column: First, the elastic coupling of the electronic power steering motor is seriously worn, (it is a very small plastic part, only a few dollars), but this thing can only be bought in 4S stores.

Second, the problem of the electronic steering column, which needs to be replaced by the assembly, the original ** is about 6,000 yuan. However, the warranty period of these two parts is five years and 100,000 kilometers, and if your car is still under warranty, you can go to the 4S shop to replace it for free. I hope my answer will be helpful to you.

If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

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Step on the brakes a few times in a row, the electric vacuum pump should work, there is a pressure sensor on the vacuum tank, the pressure sensor gives the signal to the controller, and the controller controls the electric vacuum pump to work, if you step on the brakes several times in a row, the electric vacuum pump does not work, you need to check the vacuum pump insurance, read the pressure sensor data flow with a diagnostic instrument, the data flow is not right, check the pressure sensor and the line.

Where did you buy it from? I also want to buy one for my dad.