Division 2.1.8 F1

Paragraphs 3.3.5. to 3.3.5.2. of Annex 11 of UN/ECE Regulation No 83 shall be understood as follows:

‘3.3.5.

Manufacturers may demonstrate to the Type Approval Authority that certain components or systems need not be monitored if, in the event of their total failure or removal, emissions do not exceed the OBD threshold limits given in paragraph 3.3.2. of this Annex.

3.3.5.1.

The following devices should however be monitored for total failure or removal (if removal would cause the applicable emission limits in paragraph 5.3.1.4. of this Regulation to be exceeded):

1. (a)

   A particulate trap fitted to compression ignition engines as a separate unit or integrated into a combined emission control device;

2. (b)

   A NO _x after treatment system fitted to compression ignition engines as a separate unit or integrated into a combined emission control device;

3. (c)

   A Diesel Oxidation Catalyst (DOC) fitted to compression ignition engines as a separate unit or integrated into a combined emission control device.

3.3.5.2.

The devices referred to in paragraph 3.3.5.1. of this Annex shall also be monitored for any failure that would result in exceeding the applicable OBD threshold limits.’