Tag Archives: occupant classification system

OCS Sensors May Short Circuit In Lexus And Toyota Vehicles

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Toyota Motor Engineering & Manufacturing (Toyota) has announced a significant recall affecting a range of Lexus and Toyota vehicles from the 2020 to 2022 model years. This recall, necessitated by a defect in the Occupant Classification System (OCS) sensor, underscores a critical safety issue that could potentially prevent the deployment of the front passenger airbag.

The recall spans a variety of models, including:

  • Lexus ES (2020-2021)
  • Lexus ES Hybrid (2020-2022)
  • Lexus RX and RX Hybrid (2020-2021)
  • Toyota Avalon and Avalon Hybrid (2020-2021)
  • Toyota Camry and Camry Hybrid (2020-2022)
  • Toyota Corolla, Highlander, and their Hybrid variants (2020-2021)
  • Toyota RAV4 and RAV4 Hybrid (2020-2021)
  • Toyota Sienna Hybrid (2021)

The issue originates from the Occupant Classification System sensors located in the front passenger seat. These sensors play a pivotal role in the Supplemental Restraint System (SRS), determining the deployment of the front passenger airbag based on the occupant load. A defect has been identified wherein, during production, the sensor’s Printed Circuit Board (PCB) became deformed. This deformation can cause a crack in a capacitor, leading to moisture intrusion over time and resulting in a short circuit.

The malfunctioning of these sensors poses a significant risk. In the event of a short circuit, the SRS warning lamp and the “Passenger Airbag OFF” lamp will illuminate, accompanied by a message on the Multi-Information Display (MID). The most concerning consequence is that the front passenger airbag may not deploy in certain crashes, markedly increasing the risk of injury to the occupant.

To address this issue, Toyota dealers will conduct inspections and replace the sensor where necessary. The recall is comprehensive in its scope, and owner notification letters are expected to be dispatched starting February 4, 2024.

Toyota has assigned the numbers 23TB15/23TA15 for Toyota and 23LB03/23LA03 for Lexus vehicles to this recall. Additionally, the National Highway Traffic Safety Administration (NHTSA) has registered this recall under campaign number 23V-865.

This recall by Toyota highlights the intricate nature of modern automotive safety systems and the critical importance of their proper functioning. Owners of the affected vehicles are urged to heed the recall notice and have their vehicles inspected and repaired as necessary to ensure their safety and that of their passengers.

2018 Hyundai Genesis OCS Problem

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Hyundai will be contacting the owners of certain 2018 Genesis G80 sedans regarding a problem affecting the Occupant Classification System (OCS).

According to defect reports filed with the NHTSA, a routine inspection at the vehicle assembly plant found that the OCS re-coding program used in a specific assembly line could incorrectly reset the calibration for heated seats to the calibration for vented seats. As a result, if an infant or child is occupying the front passenger seat, the OCS could fail to deactivate the airbag. If an adult is occupying the front passenger seat the OCS will function properly.

Those receiving notices will be asked to return to their dealership to have the OCS reprogrammed. Owners wanting more information about this defect can contact Hyundai customer service at 1-855-371-9460. Hyundai’s number for this recall is 002G and the NHTSA campaign number is 18V-496.

2016 Toyota Avalon & Camry Occupant Classification Problem

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The occupant classification system (OCS) of certain 2016 Toyota Avalon and 2016 Toyota Camry vehicles may have not been properly calibrated and could fail to comply with the Federal Motor Vehicle Safety Standards (FMVSS) for occupant crash protection. The problem could result in non-deployment of the front passenger airbag and knee airbag, leaving front seat passengers unprotected during an accident. Continue reading →

Chevy, Infiniti & Nissan Inaccurate Airbag Classification

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Certain 2013-2017 Chevrolet, Infiniti and Nissan owners will be contacted by the manufacturer about a problem affecting the airbag deployment system. The front seat passenger Occupant Classification System (OCS) may incorrectly classify an adult passenger as a child or classify the seat as empty despite it being occupied. As a result, the passenger frontal air bag may not deploy or could deploy incorrectly during a crash. Continue reading →

2015 Chrysler 200 Improper Airbag Deployment

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Chrysler will be asking the owners of certain 2015 Chrysler 200 cars to return to their dealership for a problem affecting the airbag deployment system. The affected vehicles have had the Occupant Classification Module (OCM) or the Seat Cushion Foam (SCF) of the front passenger seat replaced during service work. If both pieces were not replaced together, the occupant detection and classification system may not be properly calibrated and the passenger air bag could improperly deploy during a crash, increasing the risk of injury. Continue reading →

VW Golf & Jetta Inaccurate Occupant Classification

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A small number of 2015 Volkswagen E-Golf, Golf, and Jetta owners will be receiving notices about a problem affecting the front passenger airbag in their vehicles. According to the defect report, an electromagnetic coil inside a module in the Passenger Occupant Detection System (PODS) may have been manufactured with improper insulation between the coil layers. Over time, the characteristics of the coil could change and give erroneous front passenger classification readings. Vehicle occupants will be alerted of a problem by an illuminating airbag warning light or by false indication of the Passenger Airbag OFF indicator. Continue reading →

2014-2015 Chevrolet Impala Seat Belt Occupant Sensing Problem

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General Motors have announced a problem affecting the automatic occupant sensing (AOS) system in certain 2014-2015 Chevrolet Impala vehicles equipped with front vented-heated passenger seats. According to reports, the AOS calibration process may not effectively account for humidity and build material variation and could fail to suppress the front passenger air bag if a child seat is in the front passenger seat. If the airbag deploys with a child seat in the front passenger seat it could increase the risk of injury to the child. The front-passenger airbag status light will indicate that the airbag is “on” when the passenger seat is not occupied or is occupied by an infant. Additionally, the front-passenger seat’s safety-belt warning light and chime may turn on when the passenger seat is not occupied and the seatbelt is not buckled. Continue reading →

2012 Subaru Impreza Passenger Airbag Could Deactivate

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An electrical problem affecting certain 2012 Subaru Impreza four door cars will have 32,400 owners returning to their dealership for repairs. The affected vehicles are equipped with a capacitance type Occupant Detection Systems (ODS) in the front passenger seat.

According to the defect report filed with the NHTSA, if the passenger is using a device plugged into the accessory power outlet and/or touches a grounded metal part of the vehicle, while the ODS is on, the occupant control unit (OCU) may falsely register an abnormally high rise in the occupant’s capacitance. This could result in deactivation of the ODS. If this happens, a Diagnostic Trouble Code (DTC) will be stored in the vehicle’s memory, (B1650, B1760 and/or B1761), the airbag warning light will illuminate, and the passenger air bag indicator will illuminate “OFF”. Continue reading →