ISO 15031-4 pdf download – Road vehicles -Communication between vehicle and external equipmentfor emissions-related diagnostics —Part 4: External test equipment.
When current data items are selected for display, the external test equipment will continuously request of the vehicle the data to be displayed and will display the data received in the corresponding response messages. When freeze frame or test parameters and results are selected for display, the external test equipment does not need to continuously request and display those items.
Where applicable, the external test equipment shall indicate whether a test limit is a high limit or a low limit. Where applicable, the display of test results shall also show the test ID (identifier) and component ID.
Data from the vehicle may indicate which items are supported, In which case this information shall be made available to the user by the external test equipment. The external test equipment shall also alow users to specify requests for services, parameters, test IDs, etc. irrespective of whether the vehicle has indicated support lot such items.
7.7 Code clearing
The external test equipment shall be capable of sending a request to clear OBD emissions-related diagnostic trouble codes, freeze frame data arid diagnostic tests status information. The external test equipment shall require the user to confirm such a request prior to transmission.
7.8 On-board diagnostic evaluations
7.8.1 Completed on-board system readiness tests
Immediately after the equipment has successfully established communication with the vehicle, it shall check the status of the system readiness tests. If the supported tests have not all been completed, the equipment shall indicate to the user: Net all supported on-board system readiness tests have been completed or equivalent. The equipment shall also allow the user to identify any readiness tests that have not been completed.
7.8.2 Supported on-board system readiness tests
The external test equipment shall indicate to the user which of the tests specified by ISO 15031-5 service $01 PlO $01 data B- D, or SAE J1939-73 DM5 bytes 4-8. are supported and which of these have been compIeted
7.8.3 Malfunction Indicator Lamp — status and control
The external test equipment shall be capable of indicating whether the MIL (Malfunction Indicator Lamp) has been commanded ON and if so, by Which module or modules.
79 Use of StopCommunication service associated with ISO 14230-4 (optional)
When ISO 14230-4 Is berg used to support OBD requirements in a vehicle, the external test equipment may provide to the operator the ability to select the StopCommunication service defined for ISO 14230-4.
8 User interface
8.1 Display
The external test equ,merit shall be capable of displaying simultaneously at least two items of OBD emissions-related current data items, emissions-related freeze frame data items, or emissions-related diagnostic trouble codes A list of the OBD current data and freeze frame data items, their parameter lOs, data resolution and data conversion information, units and display formats is provided in ISO 15031-5. The display shall be capable of displaying alphanumeric characters. The display shall at least support the SI-units as specified In ISO 15031-5 The unit conversions specified In ISO 15031-5 shall be used.
Three (3) examples of at least production intent level external test equipment shall pass all these tests in orderfor a given version of external test equipment hardware and software to be considered passed,and theequipment manufacturer shall ensure consistent quality of manufacture to meet this standard, to ensureconsistent compatibility between external test equipment and vehicle,
Any changes to the hardware or software used in an external test equipment for the functions described in thisInternational Standard shall require a retest of these tests or an explanation from the external test equipmentmanufacturer as to why the change shall not require a retest. Where an explanation is submitted in lieu of aretest due to a change,the organization originally performing these tests shall determine whether theexplanation is acceptable or whether a retest is required.Reasonable normal engineering criteria shall beused when determining whether to accept an explanation.
For every product type which is labelled as conforming to, or compatible with the requirements of lS0 15031-4OBD access facilities, or other labelling to that effect, the manufacturer shall record:;
a) clear indication of the versions of product hardware, software and protocols supported,b)the methods used to make these tests,
c)the results of the tests.
ISO 15031-4 pdf download – Road vehicles -Communication between vehicle and external equipmentfor emissions-related diagnostics —Part 4: External test equipment
