DME 7.8 DME 7.8 0 · 0-3.1Data output with a scan tool - 911 Carrera (996

DME 7.8 DME 7.8 0 0-3.1Data output with a scan tool - 911 Carrera (996) The output of data relevant to OBD from the control modules was stipulated by law for the USA. It is described in SAE J 1979. Data output is subdivided into different modes. Mode 1 Output of: ♦Input signals ♦Output signals ♦System status information ♦Values calculated by the control module Mode 2 Output of operating conditions (Freeze Frame), if a fault has been stored. Mode 3 Output of stored faults. Mode 4 Erase the fault memory. Mode 5 Output of oxygen sensor data. Mode 6 Output of test results of non-continuous tests. Mode 7 Output of test results of continuous tests. Output of suspected faults. The data sets in the modes are referred to as Parameter Identifica- tion (PID). After being stimulated by a generic scan tool, all systems relevant to OBD log on with their address. In vehicles with ME 7.8, this is the DME with the address $11 and in Tiptronic vehicles it is the trans- mission control module with the address $1A. Note! The $ symbol means that a hexadecimal number is involved. Data output with a scan tool - 911 Carrera (996) 0-3.1 page 1 Printed in Germany – 8, 2002 dsc_FL78