A. Vehicle fault elimination method (1). Method of target question closely Select the target by centering on systems related to trouble for fault phenomena and question closely based on examination. Select the target by centering on systems related to trouble for fault phenomena and question closely based on examination. (2). Screening method (Exclusion method) Eliminate the false and retain the true and remove the superficial phenomena by inquiring vehicle user and running up test to confirm fault authenticity; during the process of test run, analysis and judgment, systems (components) operated normally can be confirmed without fault one by one until assembly (components) causing faults are approached. Once the assemblies (components) causing faults are selected, then please repair or replace the assembly (components) and then inspect by test run. If fault phenomena are eliminated, the fault elimination work is finished. If fault phenomena are not eliminated, then please continue to carry out screening. (3). Principle judgment method Judge whether the selected target works normally according to the system or assembly (components) operating principle. (4). Running-up test method Please experience and feel the authenticity of fault phenomena, extent and range of problems through running-up test to establish target for eliminating vehicle faults. B. Vehicle fault elimination steps Step 1: Description of vehicle fault phenomena Under general conditions, when vehicles with faults are repaired, servicemen shall ask driver about vehicle fault phenomena, features, symptoms before fault appears and the time of fault and then make preliminary qualitative judgment. Step 2: Verification and test of vehicle fault phenomena (1). General steps are as follows: Before the vehicle is verified and tested, servicemen shall implement visual inspection on vehicle appearance and suspicious part around the vehicle. When visual inspection is implemented, please make sure: observe carefully and inspect with hands before disassembly and then inquiry continuously. At the same time, please inspect the vehicle by following the principle of from the easy to the difficult, from the near to the distant and from the outside to the inside. Please carry out test run and confirm “fault phenomena” and the systems incurring “fault phenomena”. Based on confirmation, please carry out experiment comparison for key parts. Step 3: Vehicle fault analysis Analysis can be divided into: please analyze the system (relevant assembly and component) which may cause “fault phenomena” and key parts (assembly) which may cause “fault phenomena”. The analysis shall be carried out according to vehicle system’s structure and operating principle. Please analyze repeatedly to find out causes. The analysis process is a complicated process so that it needs the support of theory, principle and experience and also needs meticulous and logical thinking. At the same time, experimental tests are continuously needed. As a result, reliable judgment conclusion can be obtained. Step 4: Vehicle fault judgment The vehicle fault judgment is made based on analysis and maintenance experience. The adjustment result may be correct or may be not correct, which is normal. The reason is that the fault may be simple and unique or may be multiple and comprehensive. Therefore, repeated analysis and experiment comparison are needed step by step until the problem is completely solved. Step 5: Vehicle fault elimination Vehicle fault elimination and repairing is not a complicated labor process. The main contents are simple disassembly and assembly. The disassembly shall follow the principle of from the easy to the difficult and from the outside to the inside to carry out partial disassembly to avoid disassembly with large area. Requirements for disassembly shall be noted when disassembly and assembly. Step 6: Verification and test after vehicle fault elimination The repaired vehicle shall be verified. The standard of verification and test is to eliminate vehicle fault phenomena and symptoms. If fault phenomena and symptoms are not eliminated, please repeat the above steps until vehicle fault is completely eliminated.