Particle filter replacement DDE 7.x

After replacement of the particle filter, the corresponding service function must be carried out. This ensures that the specific values in the DDE control unit for the particle filter, e.g. the calculated soot mass in the particle filter, are reset to zero or to a standard value.

Resetting the values is automatic while the service function is being run.

New CBS strategy:

With introduction of the new CBS strategy for BMW diesel models (first deployment: in the E70 as of 09/2006), the remaining distance for the particle filter can be read out via the control unit functions. As the particle filter is no longer a CBS function, two new faults indicate limited remaining availability:

• Fault 452A appears when the particle filter has exceeded most of the maximum running distance and serves as information/request for competent filter replacement in the BMW workshop.
  
• Fault 4D4A appears if no measures are taken despite the request for filter replacement being issued and the total running distance of the particle filter has been exceeded.