Title 13, California Code Regulations, Section 1968.2
Malfunction and Diagnostic System Requirements for 2004 and Subsequent Model-Year Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles and Engines(OBD II). OAL-Approved Final Regulation Order for OBD II and Emission Warranty Regulations: approved on November 9, 2007.
« (4) In-Use Monitor Performance Ratio Definition | 目录 | (6) Malfunction Criteria Determination for Diesel Vehicles »
(5) Standardized tracking and reporting of monitor performance.
(5.1)
For monitors required to track and report in-use monitor performance in section (d)(3.2.2), the performance data shall be tracked and reported in accordance with the specifications in sections (d)(4), (d)(5), and (g)(5). The OBD II system shall separately report an in-use monitor performance numerator and denominator for each of the following components: catalyst bank 1, catalyst bank 2, primary oxygen/exhaust gas sensor bank 1, primary oxygen/exhaust gas sensor bank 2, evaporative 0.020 inch leak detection system, EGR/VVT system, and secondary air system, PM filter, NOx aftertreatment (e.g., NOx adsorber, NOx catalyst), secondary oxygen sensor, and boost pressure control system. The OBD II system shall also report a general denominator and an ignition cycle counter in the standardized format specified in sections (d)(5.5), (d)(5.6) and (g)(5).
(5.2) Numerator
(5.2.1)
The OBD II system shall report a separate numerator for each of the components listed in section (d)(5.1).
(5.2.2)
For specific components or systems that have multiple monitors that are required to be reported under sections (e) or (f) (e.g., oxygen sensor bank 1 may have multiple monitors for sensor response or other sensor characteristics), the OBD II system shall separately track numerators and denominators for each of the specific monitors and report only the corresponding numerator and denominator for the specific monitor that has the lowest numerical ratio. If two or more specific monitors have identical ratios, the corresponding numerator and denominator for the specific monitor that has the highest denominator shall be reported for the specific component.
(5.2.3)
The numerator(s) shall be reported in accordance with the specifications in section (g)(5.2.1).
(5.3) Denominator
(5.3.1)
The OBD II system shall report a separate denominator for each of the components listed in section (d)(5.1).
(5.3.2)
The denominator(s) shall be reported in accordance with the
specifications in section (g)(5.2.1).
(5.4) Ratio
(5.4.1)
For purposes of determining which corresponding numerator and denominator to report as required in section (d)(5.2.2), the ratio shall be calculated in accordance with the specifications in section (g)(5.2.2).
(5.5) Ignition cycle counter
(5.5.1) Definition:
- (A) The ignition cycle counter is defined as a counter that indicates the number of ignition cycles a vehicle has experienced as defined in section (d)(5.5.2)(B).
- (B) The ignition cycle counter shall be reported in accordance with the
specifications in section (g)(5.2.1).
(5.5.2) Specifications for incrementing:
- (A) The ignition cycle counter, when incremented, shall be incremented by an integer of one. The ignition cycle counter may not be incremented more than once per driving cycle.
- (B) The ignition cycle counter shall be incremented within ten seconds if and only if the vehicle meets the engine start definition (see section ©) for at least two seconds plus or minus one second.
- © The OBD II system shall disable further incrementing of the ignition cycle counter within ten seconds if a malfunction of any component used to determine if the criteria in section (d)(5.5.2)(B) are satisfied (i.e., engine speed or time of operation) has been detected and the corresponding pending fault code has been stored. The ignition cycle counter may not be disabled from incrementing for any other condition. Incrementing of the ignition cycle counter shall resume within ten seconds when the malfunction is no longer present (e.g., pending code erased through selfclearing or by a scan tool command).
(5.6) General Denominator
(5.6.1) Definition:
- (A) The general denominator is defined as a measure of the number of times a vehicle has been operated as defined in section (d)(5.6.2)(B).
- (B) The general denominator shall be reported in accordance with the specifications in section (g)(5.2.1)
(5.6.2) Specifications for incrementing:
- (A) The general denominator, when incremented, shall be incremented by an integer of one. The general denominator may not be incremented more than once per driving cycle.
- (B) The general denominator shall be incremented within ten seconds if and only if the criteria identified in section (d)(4.3.2)(B) are satisfied on a single driving cycle.
- © The OBD II system shall disable further incrementing of the general denominator within ten seconds if a malfunction of any component used to determine if the criteria in section (d)(4.3.2)(B) are satisfied (i.e., vehicle speed, ambient temperature, elevation, idle operation, or time of operation) has been detected and the corresponding pending fault code has been stored. The general denominator may not be disabled from incrementing for any other condition (e.g., the disablement criteria in sections (d)(4.5.1) and (d)(4.5.2) may not disable the general denominator). Incrementing of the general denominator shall resume within ten seconds when the malfunction is no longer present (e.g., pending code erased through self-clearing or by a scan tool command).
« (4) In-Use Monitor Performance Ratio Definition | 目录 | (6) Malfunction Criteria Determination for Diesel Vehicles »
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