Mode 4

Data Output with a Scan Tool

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 4
Erase the fault memory.

Mode 4
In Mode 4, the fault memory can be erased.

NOTE: The fault memories of all systems relevant to OBD are erased.

If the fault memory is erased, Mode 5 and Mode 6 values are also reset. Furthermore, the adaptation values are neutralized.