Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:13:p16
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 13 (pt 16/23)
Character Range: 1987725–1991015

temperature, fuel system status (e.g. closed-loop, open-loop), fuel trim value(s), ignition timing advance, intake air temperature, intake manifold air pressure, air flow rate, engine speed (RPM), throttle position sensor output value, secondary air status (upstream, downstream or atmosphere), calculated load value, vehicle speed, fuel pressure, oxygen sensor and lambda sensor.

               The signals shall be provided in standard units based on the specifications given in paragraph 6.5.3. of this appendix. Actual signals shall be clearly identified separately from default value or limp-home signals.

              6.5.1.3. For all emission control systems for which specific on-board evaluation tests are conducted (catalyst, oxygen sensor, etc.), except misfire detection, fuel system monitoring and comprehensive component monitoring, the results of the most recent test performed by the vehicle and the limits to which the system is compared shall be made available through the serial data port on the standardised data link connector according to the specifications given in paragraph 6.5.3. of this appendix. For the monitored components and systems excepted above, a pass/fail indication for the most recent test results shall be available through the data link connector.

               All data required to be stored in relation to OBD in-use performance according to the provisions of paragraph 7.6. of this appendix shall be available through the serial data port on the standardized data link connector according to the specifications given in paragraph 6.5.3. of this appendix.

              6.5.1.4. The OBD requirements to which the vehicle is certified and the major emission control systems monitored by the OBD system consistent with paragraph 6.5.3.3. of this appendix shall be available through the serial data port on the standardised data link connector according to the specifications given in paragraph 6.5.3. of this appendix.

              6.5.1.5. For all types of vehicles entering into service, the software calibration identification number shall be made available through the serial port on the standardised data link connector. The software calibration identification number shall be provided in a standardised format.

              6.5.2.  The emission control diagnostic system is not required to evaluate components during malfunction if such evaluation would result in a risk to safety or component failure.

              6.5.3.  The emission control diagnostic system shall provide for standardised and unrestricted access and conform to the following ISO standards and/or SAE specification. Later versions may be used at the manufacturers' discretion.

              6.5.3.1.  The following standard shall be used as the on-board to off-board communications link:

                  (a)  ISO 15765-4:2011 "Road vehicles – Diagnostics on Controller Area Network (CAN) – Part 4: Requirements for emissions-related systems", dated 1 February 2011.

              6.5.3.2. Standards used for the transmission of OBD relevant information:

                  (a)  ISO 15031-5 "Road vehicles - communication between vehicles and external test equipment for emissions-related diagnostics – Part 5: Emissions-related diagnostic services", dated