Advanced Automotive Fault Diagnosis
tải về 7.07 Mb. Chế độ xem pdf
|
LÔØI NOÙI ÑAÀU, ledklok
- Điều hướng trang này:
- 2.9 Data sources 2.9.1 Introduction
| 2.8.2 Off-board diagnostics
The continual increase in the use of electronics within vehicles represents a major challenge for customer service and workshop operations. Modern diagnosis and information systems must cope with this challenge and manufacturers of test equipment must provide instruments that are flexible and easy to handle. Quick and reliable fault diagnosis in modern vehicles requires exten- sive technical knowledge, detailed vehicle infor- mation, up-to-date testing systems and the skill to be able to apply all of these. The test equipment on the market can be sub- divided into two main categories: ● hand-held or portable instruments; ● stationary equipment. Hand-held instruments are commonly used for the control of engine functions like ignition or fuel injection and the request of error codes from the ECUs. Stationary test equipment may be able to cover the whole range of function and performance checks of the engine, gear, brakes, chassis, and exhaust monitoring. Most of the common testers are used for diagnosing engine faults. For repair, service, and maintenance, many dif- ferent manuals and microfiches are used in work- shops. It is difficult to collect all the necessary information, especially when vehicles of different makes have to be repaired. It is, however, becoming common to supply material on CD/DVD. Work- shops equipped with appropriate data systems will be able to receive updates via telephone line or by periodic receipt of updated CDs. A committee of the Society of Automotive Engineers (SAE) has prepared rules for the standardisation of manuals. 2.9 Data sources 2.9.1 Introduction Data is available from a number of sources; clearly the best being direct from the manufacturer. However, for most ‘general’ repair workshops other sources have to be found. Examples of the type of data necessary for diagnostic and other work are as follows: ● Component specification (resistance, voltage output etc.) ● Diagnostics charts ● Circuit diagrams (Figure 2.11) ● Adjustment data ● Timing belt fitting data ● Component location (Figure 2.12) Diagnostic techniques tải về 7.07 Mb. Chia sẻ với bạn bè của bạn:
|