Technical Data For OBD, List of Functions

OBD capabilities
Memory
- Rapid data transfer yes
Data output
- Rapid data transfer yes
Check Control Module Versions yes
Check DTC Memory yes
Output Diagnostic Test Mode yes
Basic Setting no
Code Control Module no
Read Measuring Value Block yes
Read Individual Measuring Block no
Adaptation no


The convertible top control module -J256- can differentiate between 35 different types of malfunctions. Malfunctions are stored as Diagnostic Trouble Codes (DTCs) in DTC memory and remain stored until the memory is checked and then erased using the VAG1551 scan tool.


NOTES:
- All of the available On Board Diagnostic (OBD) capabilities can only be fully utilized by using the VAG1551 scan tool.
- The On Board Diagnostic (OBD) program can be initiated only with the engine not running and the ignition switched on.
- If the convertible top control module -J256- recognizes a malfunction during the movement of the top, the hydraulic system is switched off and the malfunction (Diagnostic Trouble Code or DTC) is stored.


Input signals
The convertible top control module recognizes "Undefined switch condition" (an incorrect switch has been operated) and "Incorrect signal" (a switch has not switched at the specified time). These malfunctions are stored as static malfunctions. If the malfunction does not occur again within a complete opening and closing cycle of the convertible top, the malfunction is designated "sporadic" and indicated by "/SP" on the scan tool display. If the malfunction does not occur again within 2 complete opening and closing cycles, it is erased.

Output signals
The Convertible top control module recognizes a "Short circuit to B+" and an "Open circuit." These malfunctions are stored only as sporadic malfunctions, but are never automatically erased.