Incident: Water Ingress Causes ABS Module Short Circuit in Hyundai Vehicles

Published Date: 2018-01-24

Postmortem Analysis
Timeline 1. The software failure incident happened in the past, specifically when the car is off and stored for an extended period of time (1-2 weeks) [67701]. 2. Published on 2018-01-24. 3. The software failure incident likely occurred in early January 2018.
System 1. Anti-lock brake module in 2006-2011 Hyundai Azeras and 2006 Hyundai Sonatas [67701]
Responsible Organization unknown
Impacted Organization 1. Vehicle owners of 2006-2011 Hyundai Azeras and 2006 Sonatas were impacted by the software failure incident involving water ingress into the anti-lock brake module causing an electrical short circuit and a fire risk [67701].
Software Causes 1. The software cause of the failure incident was an electrical short circuit in the anti-lock brake module due to water ingress, leading to a fire risk in the engine compartment [67701].
Non-software Causes 1. Water ingress into the anti-lock brake module causing an electrical short circuit [67701].
Impacts 1. The software failure incident in the Hyundai vehicles led to a potential risk of an engine compartment fire due to water ingress into the anti-lock brake module, causing an electrical short circuit [67701]. 2. The recall affected 87,854 vehicles, including 2006-2011 Azeras and 2006 Sonatas, which required a fix involving the installation of a relay in the main fuse panel to prevent the ABS module from shorting out while the car is off [67701]. 3. The impact of the software failure was limited to specific conditions when the car was off and stored for an extended period (1-2 weeks), with no risk of the issue occurring while the car was being driven [67701]. 4. There was only one reported instance of actual smoke but no fire related to the ABS module overheating in the US, and one case of an overheated ABS module in South Korea [67701].
Preventions 1. Regular software maintenance and updates to ensure the ABS module software is up-to-date and free from vulnerabilities [67701]. 2. Implementing rigorous testing procedures during the development phase to detect and address any potential issues related to water ingress and electrical short circuits [67701]. 3. Conducting thorough risk assessments and simulations to identify and mitigate risks associated with rare and specific conditions that could lead to the failure incident [67701].
Fixes 1. Dealers installing a relay in the vehicle's main fuse panel to eliminate the possibility of the ABS module shorting out while the car is off [67701].
References 1. Hyundai - The articles gather information about the software failure incident from Hyundai, the manufacturer of the affected vehicles. [67701]

Software Taxonomy of Faults

Category Option Rationale
Recurring unknown (a) The article does not mention any previous incidents of the software failure related to water ingress into the anti-lock brake module within Hyundai's products or services. Therefore, there is no information available to suggest that a similar incident has happened before within the same organization [67701]. (b) The article does not provide information about similar incidents happening at other organizations or with their products and services. Hence, there is no data available to indicate that a similar incident has occurred elsewhere [67701].
Phase (Design/Operation) design (a) The software failure incident in the article is related to the design phase. The issue with water ingress into the anti-lock brake module causing an electrical short circuit leading to a fire risk is a design flaw in the system. Hyundai is addressing this issue by installing a relay in the vehicle's main fuse panel to eliminate the possibility of the ABS module shorting out while the car is off, indicating a design-related failure [67701]. (b) There is no information in the article suggesting that the software failure incident is related to the operation phase. The reported issue is specifically linked to a design flaw in the anti-lock brake module, rather than any misuse or operational error [67701].
Boundary (Internal/External) within_system (a) The software failure incident related to the ABS module in Hyundai vehicles is within_system. The issue is caused by water ingress into the anti-lock brake module, leading to an electrical short circuit that could result in an engine compartment fire. Hyundai is addressing this issue by installing a relay in the vehicle's main fuse panel to eliminate the possibility of the ABS module shorting out while the car is off [67701].
Nature (Human/Non-human) non-human_actions (a) The software failure incident in this case is not related to non-human actions but rather to a potential electrical short circuit in the anti-lock brake module due to water ingress, which could lead to an engine compartment fire [67701]. This issue is described as occurring under specific conditions when the car is off and stored for an extended period of time, indicating that it is not a result of non-human actions but rather a design flaw or vulnerability in the system.
Dimension (Hardware/Software) hardware (a) The software failure incident in the article is related to hardware. The issue mentioned is water ingress into the anti-lock brake module causing an electrical short circuit that could result in an engine compartment fire. The fix for this potential short involves dealers installing a relay in the vehicle's main fuse panel to eliminate the possibility of the ABS module shorting out while the car is off [67701].
Objective (Malicious/Non-malicious) non-malicious (a) The software failure incident described in the article is non-malicious. It is related to water ingress into the anti-lock brake module causing an electrical short circuit that could result in an engine compartment fire, even if the vehicle isn't running. Hyundai is conducting a recall to address this issue by installing a relay in the vehicle's main fuse panel to eliminate the possibility of the ABS module shorting out while the car is off. The article mentions that this issue can only occur under specific conditions when the car is off and stored for an extended period of time, indicating that it is not a deliberate act of sabotage but rather a technical flaw [67701].
Intent (Poor/Accidental Decisions) unknown The software failure incident related to the ABS module recall by Hyundai does not directly point to a software failure caused by poor decisions or accidental decisions. The issue was related to water ingress into the anti-lock brake module causing an electrical short circuit that could result in an engine compartment fire. The fix involved installing a relay in the vehicle's main fuse panel to eliminate the possibility of the ABS module shorting out while the car is off. The incident was described as occurring under very rare and specific conditions when the car is off and stored for an extended period of time, with no risk of the issue occurring while the car is being driven. The article does not attribute the software failure to poor or accidental decisions [67701].
Capability (Incompetence/Accidental) unknown The article does not mention any software failure incident related to development incompetence or accidental factors. Therefore, the information about these specific types of software failure incidents is unknown based on the provided article.
Duration temporary The software failure incident mentioned in the article is temporary. The issue with water ingress into the anti-lock brake module causing an electrical short circuit that could result in an engine compartment fire only occurs under specific conditions when the car is off and stored for an extended period of time (1-2 weeks) [67701].
Behaviour other (a) crash: The software failure incident in the article does not involve a crash where the system loses state and does not perform any of its intended functions. The issue described is related to a potential electrical short circuit in the anti-lock brake module that could cause an engine compartment fire when the vehicle is off and stored for an extended period of time [67701]. (b) omission: The software failure incident does not involve omission where the system omits to perform its intended functions at an instance(s). The issue described is more related to a potential short circuit in the ABS module rather than the system omitting any functions [67701]. (c) timing: The software failure incident does not involve timing issues where the system performs its intended functions correctly but too late or too early. The issue described is more related to a potential electrical short circuit in the anti-lock brake module that could cause a fire under specific conditions when the car is off and stored for an extended period of time [67701]. (d) value: The software failure incident does not involve a value issue where the system performs its intended functions incorrectly. The issue described is more related to a potential electrical short circuit in the anti-lock brake module that could cause an engine compartment fire under specific conditions [67701]. (e) byzantine: The software failure incident does not exhibit a byzantine behavior where the system behaves erroneously with inconsistent responses and interactions. The issue described is more related to a potential electrical short circuit in the anti-lock brake module that could cause a fire under specific conditions when the car is off and stored for an extended period of time [67701]. (f) other: The software failure incident in the article can be categorized as a potential safety hazard due to an electrical short circuit in the anti-lock brake module that could lead to an engine compartment fire even when the vehicle is not running. The fix involves installing a relay in the vehicle's main fuse panel to prevent the ABS module from shorting out while the car is off [67701].

IoT System Layer

Layer Option Rationale
Perception None None
Communication None None
Application None None

Other Details

Category Option Rationale
Consequence property, theoretical_consequence The consequence of the software failure incident described in the article is related to property. The software failure in this case, which involved water ingress into the anti-lock brake module of certain Hyundai vehicles, could cause an electrical short circuit leading to an engine compartment fire. This issue could impact the material goods (vehicles) of the owners, as there was a recall of 87,854 vehicles to address this potential risk [67701].
Domain transportation (a) The failed system in the article is related to the transportation industry. The software failure incident involves water ingress into the anti-lock brake module of Hyundai vehicles, which could cause an electrical short circuit leading to a potential fire risk in the engine compartment [67701].

Sources

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