柴油及替代清洁燃料引擎汽车车型排气审验合格证明核发撤销及废止.DOCVIP

PAGE 9 Appendix 5 OBD system Terms used in this Appendix are defined as follows: Malfunction: means the failure of an emission-related component or system that would result in emissions exceeding the regulated limits or if the OBD system is unable to fulfill the basic monitoring requirements of this Appendix. Malfunction simulation: use replacement of the catalyst with a deteriorated or defective catalyst or electronic simulation of such a failure. Malfunction indicator: means a visible or audible indicator that clearly informs the driver of the vehicle in the event of a malfunction of any emission-related component connected to the OBD system, or the OBD system itself. Continuous monitoring: Continuous monitoring the circuit continuity of emission-related components connected to a computer, including any relevant sensors to enable monitoring functions (such as lack of circuit continuity, circuit malfunction, and values exceeding normal operating values). Driving cycle: The required driving modes to assess the OBD system of the emission related control systems and components; A driving cycle consists of engine start-up, driving mode where a malfunction would be detected if present, and engine shut-off and enough soaking time for the next engine start-up. Functions and related testing items of OBD shall comply with the following provisions: OBD system shall be able to monitoring and performing periodical assessment on emission control equipment and related components, the frequency shall be one OBD monitoring assessment at least for each driving cycle. Vehicle must be equipped with standardized OBD Malfunction Indicator Light (MIL), malfunction code storage capability, and reading malfunction codes via a connector. OBD shall perform monitoring assessment on the emission control equipment or related components, unless there is possibility of damaging emission control equipment and related components, or there are safety concerns, or the power take-off units are runni