the OBD test-cycle is the test-cycle used to demonstrate the capacity of the OBD monitors to detect malfunctions.

The OBD test-cycle considered in this Annex is the hot part of the WHTC cycle as described in Annex 4B.

On request of the manufacturer and after approval of the type approval authority, an alternative OBD test-cycle can be used (e.g. the cold part of the WHTC cycle) for a specific monitor.