DTC Recognition

DTC Recognition

Faults occurring in monitored sensors or components are stored in fault memory together with an indication of the type of fault.

The first step in the fault-finding process is always to start self-diagnosis and interrogate the faults stored. This can be implemented by way of the following:
- Vehicle Diagnosis, Testing and Information System VAS 5051 A
- Vehicle Diagnosis Service System VAS 5052

The fault information displayed is used in conjunction with a fault table (containing information on possible causes of trouble) to perform pin-pointed repair measures.

Information on handling malfunctions:

NOTE:
- If a fault condition exists for longer than a pre-determined period, the fault is stored as being static. If the fault condition is then no longer detected for a pre-determined period, the fault is re-classified as being a sporadic fault. This process is constantly repeated. Sporadically occurring malfunctions are identified via indication of "ISP" on the display.
- A sporadic fault is erased automatically if it no longer occurs for a pre-determined period.

At this time, On Board Diagnostic (OBD) can only be performed using the Diagnostic Operation System VAS 5051 A and Vehicle Diagnosis Service System VAS 5052 .

The On Board Diagnostic (OBD) is not just limited to saving, checking and erasing or output diagnostic test mode, but also offers with basic setting, control module identification, adaptation and coding additional options. Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.

Available functions