Functional Safety in Automotive Electronics & Software

March 3, 2021


Functional Safety (FuSa) standard ISO 26262 is adopted from IEC 61508. It is applicable to Embedded Systems, E/E, (Electronics and Software) in the Automotive industry. The first edition was released in 2011 and mainly focused on passenger cars, which can be up to 3500Kg. The second edition was released in 2019, which was updated with trucks, buses and bikes. There’s also a separate chapter added for semiconductors.

In an organization scope, more importance is given to the following in Functional Safety:

  • Establishing safety culture according to organization structure in electronics
  • Improving the vehicle knowledge according to new Kautex technology and new standards


As new technologies and more electronics are added into the vehicle, there are many dependencies among electronics on one another. Because of this, if any electronics fail, it will lead to catastrophic situations and create more damage than we can imagine or anticipate. FuSa helps in avoiding critical hazard scenarios or situations. The following is a list of the types of analyses used in different level or phases:

  • Vehicle Level: Hazard Analysis and Risk Assessment (HARA)
  • System Level: Failure Mode Effects Analysis (FMEA), Fault Tree Analysis (FTA), Design Failure Mode Effects Analysis (DFMEA)
  • Hardware Level: FMEA, Failure Modes, Effects and Diagnostic Analysis (FMEDA)
  • Software Level: FMEA, Dependent Failure Analysis (DFA), Freedom from interference (FFI),Common Cause Failures, Cascading Failures
  • Production: Process Failure Mode Effects Analysis (PFMEA)

In FuSa, we have two types of safety: Active Safety (helps you drive safely) and Passive Safety (protects you in a crash). In our Rhapsody system, we use Active Safety. Based on the criticality and impact of the system on the vehicle (HARA), the Automotive Safety Integrity Level (ASIL) is defined: ASIL A is the lowest and ASIL D is the highest.


  • ASIL A: Power Window
  • ASIL B: Head Lamps
  • ASIL C: Braking System
  • ASIL D: 
  • ADAS (level 3 and up)



Automotive SPICE is a process-based model developed by Automotive SIG (Special Interest Group). It is used for performing and assessing software development in automotive domain. Implementation of ASPICE leads to better processes and better product quality. It also enables the cooperation among complex supply chains and between development and engineering centers.


FuSa addresses the needs for an automotive-specific international standard that focuses on safety critical components. ISO 26262 is intended to be applied to safety-related systems that include one or more E/E systems and that are installed in series production passenger cars. ISO26262 addresses possible hazards caused by malfunctioning behavior of E/E safety-related systems, including interaction of these systems.


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FuSa needs to integrate and adapt to all the functions as shown. Engineering and Production are the most important to start with. So, we started with FuSa process using eFLP (stages). We are using the Safety Element out of Context (SEooC) in developing Rhapsody Fuel System. Simultaneously, we have started trainings for engineering teams supporting Vision 2025 with Smart Products.  

About Kautex

At Kautex, we are driving the future. As a Tier One automotive supplier with more than 30 plants in 13 countries, Kautex designs, develops and manufactures traditional and hybrid fuel systems, advanced cleaning solutions for assisted and autonomous driving, engine camshafts and plastic industrial packaging solutions. A pioneer in the design and manufacture of automotive plastic fuel systems, Kautex is expanding its portfolio to offer smart products and data-driven services to our customers, including thermoplastic composite and composite-metal hybrid battery systems. From a lightweight battery system to a hybrid fuel system to autonomous drive vehicle cleaning systems, Kautex is committed to pioneering solutions for the era of new mobility.

Our employees are part of a global community committed to solving customer needs, leveraging diverse skillsets, making sustainability a differentiator, embracing the diversity that is part of a global, multi-industry leader and creating an environment where employees can build a dynamic career. Together, we are reimagining the future of mobility.

About Textron Inc.

Textron Inc. is a multi-industry company that leverages its global network of aircraft, defense, industrial and finance businesses to provide customers with innovative solutions and services. Textron is known around the world for its powerful brands such as Bell, Cessna, Beechcraft, Hawker, Jacobsen, Kautex, Lycoming, E-Z-GO, Arctic Cat, and Textron Systems. For more information, visit:

Certain statements in this press release are forward-looking statements which may project revenues or describe strategies, goals, outlook or other non-historical matters; these statements speak only as of the date on which they are made, and we undertake no obligation to update or revise any forward-looking statements. These statements are subject to known and unknown risks, uncertainties, and other factors that may cause our actual results to differ materially from those expressed or implied by such forward-looking statements.

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