Vehicle Diagnostics?

Vehicle diagnostics are the mechanics involved with identifying and assessing problems that may negatively affect the normal operation of a vehicle. Mechanics may employ a wide range of techniques and tools in conducting vehicle diagnostics, ranging from cursory physical checks to more involved, computer-based analysis. Given the sometimes occult nature of mechanical problems, effective diagnostics are critical to successful repairs and the smooth running of any vehicle.

There are two types of diagnostics.

• On-Board-Diagnostic

• Off-Board-Diagnostic

On-Board-Diagnostic:

Built-In software function of ECUs, used for self diagnostic and to monitor sensors and actuators.

Off-Board-Diagnostic:

Specific diagnostic device(tester) combined with measurement technology ,remaining bus simulation and database.