The cross part between the side wall and the body is often the transmission channel of vibration or noise. The possible correction methods are as follows: Block installation (such as A-pillar and side wall) at critical position to achieve good sound insulation performance. Note: the use of foam blocks or foam filling is a good means of sound insulation.If there is noise such as wind, tire or road surface, check the condition of foam block in corresponding parts. Install foam blocks in the affected area. Fill the corresponding gaps or cavities with foam.
1.1.5.2 Fault diagnosis and test 1.1.5.2.1 Inspection and confirmation (1) Operate the vehicle to reproduce the situation and confirm the customer's problem. (2) Visual inspection can find the obvious cause of the fault. (3) If a visual inspection or a customer described problem reveals an obvious cause, repair it (if possible) before proceeding to the next step. (4) If the problem persists after the inspection, identify the symptoms and refer to the symptom table. 1.1.5.2.2 How to use this diagnostic procedure section Noise, vibration and harsh noise (NVH) issues are becoming more and more important as vehicles become more sensitive to these vibrations.
This section is used to assist in identifying these issues. This chapter proposes diagnostic procedures based on symptoms. For example, if the condition occurs at high speed, the most likely starting point for diagnosis is "shaking and shaking while driving". The road test program can identify the types of conditions and how to distinguish vibrations from shaking. Road test quick check is used to confirm whether the cause has been found or eliminated. Confirm the condition, refer to the appropriate section and perform the correct diagnosis. When the situation is confirmed, the work is half done. Follow the diagnostic procedure.
The quick check is described in the steps, while other related tests and adjustments are listed in the general procedure. Be sure to carry out each step and make a record so that it can be used as an important data reference in the future. 1.1.5.2.2.1 Customer interview Road testing and customer interviews, if possible, can provide information to identify problems and provide the correct starting point for diagnosis. 1.1.5.2.2.2 condition confirmation NVH usually occurs in four regions:
Tyre Three in one motor assembly Suspension Driving system Therefore, it is very important to isolate NVH problems in specific areas as soon as possible.The easiest and fastest way to achieve this is to carry out a road test according to the instructions.To assist in the diagnosis and test procedure, an approved appropriate NVH diagnostic tester may be used. 1.1.5.2.3 Noise diagnosis procedure 25