ISO 11992-4 PDF

ISO is a CAN based vehicle bus standard by the heavy duty truck industry. It is used for ISO Part 4: Diagnostic communication. Reference number. ISO/FDIS (E). STANDARD. ISO/FDIS. DRAFT. RECIPIENTS OF THIS DRAFT ARE INVITED TO. ISO. First edition. Road vehicles — Interchange of digital information on electrical connections between towing and towed vehicles —.

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Figure 3 — Client service state diagram — Service request with physical server target address 2? Figure 6 — A-PDU timing diagram confirmed services — functional target address 4? Diagnostics Reference number ISO In accordance with Adobe’s licensing policy, this file may be printed or viewed but shall not 11992-4 edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing.

ISO 11992-4:2005

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BS ISO 11992-4:2014

In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s member body in the country of the requester.

ISO copyright office Case postale 56? CH Geneva 20 Tel. The work of preparing International Standards is normally carried out through ISO technical committees.

Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO consists of the following parts, under the general title Road vehicles — Interchange of digital information on electrical connections between towing and towed vehicles: Physical and data-link layers Part 2: Application layer for brakes and running gear Part 3: Application layer for equipment other than brakes and running gear Part 4: When mapped on this model, the communication system specified by ISO is broken down into: Layer 7 Application layer for brakes and running gear.

Application layer for equipment other than brakes and running gear. Application layer for diagnostics. Layer 3 Network layer for diagnostics.

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Layer 2 Data link layer for all communication types. Layer 1 Physical layer for all communication types. No functions specified for this layer. Application layer Layer 6: Presentation layer Layer 5: Session layer Layer 4: Transport layer Layer 3: Network layer Layer 2: Data link layer Layer 1: Diagnostics 1 Scope This part of ISO specifies the data communication for diagnostic purposes on a serial data link between a road vehicle and its towed vehicle s.

This part of ISO is applicable to road vehicles of a maximum authorized total mass greater than 3 kg. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document including any amendments applies. Data link layer and physical signalling ISORoad vehicles — Interchange of digital information on electrical connections between towing and towed vehicles — Part 1: Physical and data-link layers ISORoad vehicles — Interchange of digital information on electrical connections between towing and towed vehicles — Part 2: Application layer for brakes and running gear ISORoad vehicles — Interchange of digital information on electrical connections between towing and towed vehicles — Part 3: Functions, services and protocols of the layers 1 to 4 shall be identical for basic diagnostics and enhanced diagnostics.

All basic diagnostic functions and services shall be provided under all operation conditions in the default diagnostic session without the need for specific access rights.

It is the responsibility of the manufacturer to secure a server against unauthorized access and to guarantee performance and safe operation in all operation modes allowing enhanced diagnostics. Client states while processing a diagnostic service shall be as specified in Table 2, events resulting in a client state change shall be as specified in Table 3. Figure 1 — Client service state diagram — Service request with physical server target address?

Client state while waiting for a confirmation from the server. Following a service request with a functional server target address: Client state for error handling, e. Following a service request with a physical server target address: The client shall then reset the time outs and enter the WS state again. The client shall then process the positive service confirmation and enter the WS state again.

The client shall then change to the NCS state. The client shall then change to the PCS state. Following a service request with a functional server target address the time ACT3. An error condition, e. The client shall then change to the ES state for error handling.

Server states while processing a diagnostic service shall be as specified in Table 4, events resulting in a server state change shall be as specified in Table 5. Server state while processing a service. Server state after the diagnostic service has been executed.

Server state error handling, e. The service execution time AST1max has expired. The server shall then enter again the PS state to proceed the service execution. The server shall then send no response code and change to the AS state.

ISO – Wikipedia

An error condition is indicated to the server, e. The server changes to the ES state for error handling. In case of differences, the specifications of this part of ISO shall have precedence. For the diagnostic communication isso road vehicles and their towed vehicles, the restrictions described in this clause apply additionally. These functions are used by client and server applications requesting the respective application layer services.

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In addition the specified parameters Priority is ReservedBit shall be used. The physical sub-networks between towing and towed vehicles are part of the local motor vehicle network and share the same address range. Figure 4 shows an example of the vehicle network architecture. Figure 4 — Vehicle network architecture example 8? Indication For a diagnostic service request transmitted from a towing vehicle to a towed vehicle, the address parameters of the service primitives have the following meaning: Confirmation For a diagnostic service response transmitted from a towed vehicle to a towing vehicle, the address parameters of the service primitives have the following meaning: Indication For a diagnostic service request transmitted from a towed vehicle to a towing vehicle, the address parameters of the service primitives have the following meaning: Confirmation For a diagnostic service response transmitted from a towing vehicle to a towed vehicle, the address parameters of the service primitives have the following meaning: Service specific parameters are specified in 6.

It represents the physical location of a client or server on the local network. It represents the physical location of 11929-4 client or server or a functional group of servers on the local network. Depending on the respective application layer primitive, RA represents either a remote target address or a remote source address. The diagnostic services specification includes tables which list diagnostic services and respective service primitive parameters.

For all services and service primitive parameters, the presence is specified by the convention values Cvt listed in Table 7. The service or service primitive parameter can be present, based on certain criteria e.

The service or service primitive 1199-24 is mandatory unless otherwise specified and is a selection from a given list of services or service primitive ios.

The service or service primitive parameter may or may not be present, depending on dynamic usage by the user. NOTE A service identifier marked as mandatory does not imply that this service has to be supported. This parameter specifies that the server shall transmit to the client the number of DTCs matching a client defined severity mask record. This parameter specifies that the server shall transmit to the client a list with severity, functional unit, DTC, failure type and status information of stored DTCs matching a client-defined severity mask record.

This parameter specifies that the server shall transmit to the client the severity, functional unit, DTC, failure type and status information matching a client-defined DTCMaskRecord.

U M Definition Cvt M 6. Table 9 — DTCSeverityMask specification Value xx1 x1x 1xx MaintenanceOnly This value indicates that the failure requests a check of the vehicle at the next maintenance. CheckAtNextHalt This value indicates that the failure requires a check of the vehicle at the next halt. CheckImmediately This value indicates that the failure requires an immediate check of the vehicle. Description Cvt M M M 6.