ISO 17987-6:2025

Overview - ISO 17987-6:2025 (LIN Protocol Conformance Test Specification)

ISO 17987-6:2025 defines the protocol conformance test specification for Local Interconnect Network (LIN) communication controllers. The standard specifies a comprehensive test suite and the technical test-system requirements needed to verify that LIN controllers conform to the protocol behaviors described in ISO 17987-2 and ISO 17987-3. Its purpose is to ensure reproducible, identical test results across different test systems when those systems and test suites comply with this document. Annex A, B and C include protocol conformance test plans for responder nodes using auto‑addressing procedures C, D and E (see ISO 17987-3:2025, Annex C).

Key technical topics and requirements

The standard focuses on test definition, measurement and repeatability for LIN protocol conformance. Major technical topics include:

• Test architecture and classification - definition of test case structure and mandatory requirements for the Implementation Under Test (IUT) as commander and responder.
• Test system requirements - generation of LIN frames, bit timing and synchronization, common test-case constraints and setup predefinitions.
• Timing parameter tests - break field, break delimiter, sync byte, header and response timing, bit rate detection and tolerance, sample-point and jitter verification.
• Frame handling - verification of identifier (PID) variations, reserved frames, unused bits, supported Tx/Rx frames and checksum handling (classic and enhanced).
• Error and robustness tests - bit errors, framing errors, checksum faults, collision handling for event‑triggered frames and robustness under malformed messages.
• Status and state management - handling of response_error signals, initialization and schedule table timing.
• Power mode tests - sleep/wake‑up behaviors and verification of go‑to‑sleep and wake signals.
• Annexed test plans - responder-specific plans for auto‑addressing procedures C/D/E to support consistent conformance checks.

Practical applications and who uses it

ISO 17987-6:2025 is intended for professionals who develop, validate or certify LIN interfaces:

• Automotive ECU and microcontroller manufacturers validating LIN communication controllers.
• Supplier and OEM test laboratories performing protocol conformance verification.
• System integrators and QA teams ensuring LIN network interoperability.
• Test-equipment and tool vendors implementing standardized LIN conformance test suites.
• Compliance engineers aligning implementations to ISO 17987-2 / ISO 17987-3.

Related standards

• ISO 17987-2 - LIN physical and data-link protocol definitions (referenced).
• ISO 17987-3 - LIN application protocol and addressing (referenced), including auto‑addressing procedures used by Annex A/B/C of Part 6.

Keywords: ISO 17987-6:2025, LIN protocol conformance test, Local Interconnect Network, LIN testing, LIN communication controller, protocol conformance, auto addressing, ISO 17987-2, ISO 17987-3.