Document ID: chunk:federal_register_of_legislation:F2008C00323:reg:11:p23
Version: federal_register_of_legislation:F2008C00323
Segment Type: reg
Provision Reference: reg 11 (pt 23/45)
Character Range: 484886–488003

conditions facilitating effective repairs for freeze-frame storage. Only one frame of data is required. Manufacturers may choose to store additional frames provided that at least the required frame can be read by a generic scan tool meeting the specifications of paragraphs 6.5.3.2. and 6.5.3.3. If the fault code causing the conditions to be stored is erased in accordance with paragraph 3.7. of Annex 11, the stored engine conditions may also be erased.

         6.5.1.2. If available, the following signals in addition to the required freeze-frame information shall be made available on demand through the serial port on the standardised data link connector, if the information is available to the on-board computer or can be determined using information available to the on-board computer: diagnostic trouble codes, engine coolant temperature, fuel control system status (closed-loop, open-loop, other), fuel trim, ignition timing advance, intake air temperature, manifold air pressure, air flow rate, engine speed, throttle position sensor output value, secondary air status (upstream, downstream or atmosphere), calculated load value, vehicle speed and fuel pressure.

         The signals shall be provided in standard units based on the specifications given in paragraph 6.5.3. 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. 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.

         6.5.1.4. The OBD requirements to which the vehicle is certified (i.e. Annex 11 or the alternative requirements specified in paragraph 5.) and the major emission control systems monitored by the OBD system consistent with paragraph 6.5.3.3. 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. From 1 January 2003 for new types and from 1 January 2005 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 must provide for standardised and unrestricted access and conform