2 bytes, subdivided as follows: 
Bit 0-10, this counter is incremented with every new diagnostic message. 
 
No diagnosis related to channel is pending 
Diagnosis related to channel is pending 
Manufacturer-
Specific 
Diagnosis 
No diagnosis related to manufacturer is pending 
Diagnosis related to channel is pending 
Submodules 
Diagnostic State 
No further diagnosis of submodule present 
 At least one further diagnosis of the submodule present 
No further diagnosis of module is present 
 At least one further diagnosis of the module is present 
2 bytes, describes the type of diagnosis 
 
Channel-related diagnosis