Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:13:p5
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 13 (pt 5/23)
Character Range: 1955692–1959368

computer, including any relevant sensors to enable monitoring functions to be carried out, shall be monitored for circuit continuity.

              3.3.3.6. The electronic evaporative emission purge control shall, at a minimum, be monitored for circuit continuity.

              3.3.3.7. Only for Level 1A

              For direct injection positive ignition engines any malfunction, which may lead to emissions exceeding the particulate OBD thresholds set out in paragraph 6.8.2. of this Regulation and which has to be monitored according to the requirements of this annex for compression ignition engines, shall be monitored.

              3.3.4. Monitoring requirements for vehicles equipped with compression-ignition engines

              In satisfying the requirements of paragraph 3.3.2. of this annex the OBD system shall monitor:

               For Level 1A only:

                  (a) Where fitted, reduction in the efficiency of the catalytic converter.

                  (b) Where fitted, the functionality and integrity of the particulate trap.

                  (c) The fuel-injection system electronic fuel quantity and timing actuator(s) is/are monitored for circuit continuity and total functional failure.

                  (d) Other emission control system components or systems, or emission-related power-train components or systems, which are connected to a computer, the failure of which may result in exhaust emissions exceeding any of the OBD thresholds set out in paragraph 6.8.2. of this Regulation. Examples of such systems or components are those for monitoring and control of air mass-flow, air volumetric flow (and temperature), boost pressure and inlet manifold pressure (and relevant sensors to enable these functions to be carried out).

                  (e) Unless otherwise monitored, any other emission-related power-train component connected to a computer shall be monitored for circuit continuity.

                  (f) Malfunctions and the reduction in efficiency of the EGR system shall be monitored.

                  (g) Malfunctions and the reduction in efficiency of a NOx after-treatment system using a reagent and the reagent dosing sub-system shall be monitored.

                  (h) Malfunctions and the reduction in efficiency of NOx after-treatment not using a reagent shall be monitored.

              For Level 1B only:

              Any emission-related power-train component connected to a computer shall be monitored for circuit continuity

              Circuit monitor list

               (i) Atmosphere pressure sensor

               (ii) Intake air pressure sensor

               (iii) Intake air temperature sensor

               (iv) Air flow sensor

               (v) Engine coolant temperature sensor

               (vi) Throttle sensor

               (vii) Cylinder identification sensor

               (viii) Crank angle sensor

               (ix) Injection timing sensor

               (x) Injection amount adjustment sensor

               (xi) Injection temperature sensor

               (xii) Injection pressure sensor

               (xiii) Oil temperature sensor

               (xiv) Oil pressure sensor

               (xv) Exhaust temperature sensor

               (xvi) Exhaust pressure sensor

              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 thresholds set out in paragraph 6.8.2. of this Regulation.

              3.3.5.1. For Level 1A only

              The following devices should however be