ISO 11992-2:2023 PDF

Road vehicles — Interchange of digital information on electrical connections between towing and towed vehicles — Part 2: Application layer for brakes and running gear

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Title (English):

ISO 11992-2:2023

Road vehicles — Interchange of digital information on electrical connections between towing and towed vehicles — Part 2: Application layer for brakes and running gear

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 103
Publication date:: March 10, 2023
Edition:: ISO IS 11992 edition 4 version 1
ICS:: 43.040.15

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Description (English):

This document specifies the SAE J1939-based application layer, the payload of messages, and parameter groups for electronically controlled braking systems, including anti-lock braking systems (ABS), vehicle dynamics control systems (VDC), and running gears equipment, to ensure the interchange of digital information between road vehicles with a maximum authorized total mass greater than 3 500 kg and their towed vehicles, including communication between towed vehicles. Conformance and interoperability test plans are not part of this document.

Technical details

Technical committee: ISO/TC 22/SC 31 - Data communication
SKU: ISO 11992-2:2023

Abstract

Overview

ISO 11992-2:2023 defines the SAE J1939-based application layer for exchanging digital information on electrical connections between towing and towed road vehicles (vehicles > 3 500 kg). It specifies the message payloads and parameter groups used by electronically controlled braking systems (including ABS and Vehicle Dynamics Control - VDC) and running‑gear equipment so that tractors, trailers and other towed vehicles can interoperate. Note: conformance and interoperability test plans are not part of this document.

Keywords: ISO 11992-2:2023, application layer, SAE J1939, towing and towed vehicles, electronic braking systems, ABS, VDC, running gear, trailer communication

Key topics and technical requirements

SAE J1939-based application layer: Defines how braking and running‑gear information is formatted and carried over the vehicle network for towing/towed connections.
Parameter groups and payloads: Detailed APP (application parameter) specifications for identification, braking and running‑gear parameters.
Braking system parameters: Wheel speeds, brake demand (service/park), brake cylinder pressures, ABS status, retarder control, brake temperatures, tyre pressure, spring brake and pneumatic supply statuses, stop-lamp and warning requests.
Identification and geometry: Axle/wheel identification, indexed identification data, geometric data indexes and indexed content to map sensors/actuators across vehicles.
Running‑gear equipment: Driven-axle load, vehicle body level (nominal and relative), level control requests/status, lift-axle positions, steering axle locking, traction help and ride‑height/ramp‑level parameters.
Inter-vehicle and intra-towed communication: Supports communication between towing and towed vehicles and among towed vehicles in a combination.
Conventions and terminology: Standardized symbols, definitions and abbreviated terms to ensure consistent implementation.

Practical applications and users

Who benefits:

Vehicle OEMs and trailer manufacturers implementing electronic braking and running‑gear interfaces
ECU and telematics suppliers building compliant CAN/J1939 modules for tractor–trailer communications
Systems integrators and calibration engineers ensuring correct message mapping and parameter interpretation

Abstract

Overview

Keywords: ISO 11992-2:2023, application layer, SAE J1939, towing and towed vehicles, electronic braking systems, ABS, VDC, running gear, trailer communication

Key topics and technical requirements

SAE J1939-based application layer: Defines how braking and running‑gear information is formatted and carried over the vehicle network for towing/towed connections.
Parameter groups and payloads: Detailed APP (application parameter) specifications for identification, braking and running‑gear parameters.
Braking system parameters: Wheel speeds, brake demand (service/park), brake cylinder pressures, ABS status, retarder control, brake temperatures, tyre pressure, spring brake and pneumatic supply statuses, stop-lamp and warning requests.
Identification and geometry: Axle/wheel identification, indexed identification data, geometric data indexes and indexed content to map sensors/actuators across vehicles.
Running‑gear equipment: Driven-axle load, vehicle body level (nominal and relative), level control requests/status, lift-axle positions, steering axle locking, traction help and ride‑height/ramp‑level parameters.
Inter-vehicle and intra-towed communication: Supports communication between towing and towed vehicles and among towed vehicles in a combination.
Conventions and terminology: Standardized symbols, definitions and abbreviated terms to ensure consistent implementation.

Practical applications and users

Who benefits:

Vehicle OEMs and trailer manufacturers implementing electronic braking and running‑gear interfaces
ECU and telematics suppliers building compliant CAN/J1939 modules for tractor–trailer communications
Systems integrators and calibration engineers ensuring correct message mapping and parameter interpretation

ISO 11992-2:2023 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Abstract

Overview

Key topics and technical requirements

Practical applications and users

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