OBDII Readiness Codes

A complete check of the engine control system can only be run by the control unit once certain operating states have been reached. For this purpose, a test drive should be carried out under the specified criteria.

The following preconditions must be met to ensure that all tests are conducted:

• No problems defined before test drive.
  
• Any stored fault codes were worked through beforehand.
  
• Fault code memory of engine control unit has been deleted.
  

Test drive procedure:

• Start a test drive in the cold state (for secondary air system test).
  
• Drive vehicle at a constant speed within the range between 65 and 95 km/h in 4th gear/selector lever position 4 for about 10 minutes (for oxygen sensors, oxygen sensor heating and catalytic converter monitoring)
  

The system tests for the secondary air pump and fuel tank leakage diagnosis pump can be additionally conducted directly by means of the test module, however, in this case, the readiness codes are not set.

The DME system is OK if all diagnosis functions are carried out and no fault codes are stored in the fault code memory.

The Readiness Codes are reset on deletion of the fault code memory.