This bulletin involves troubleshooting DTC B1447/B1448/B1764/B1767 on Kia Sorento, Optima and Rio vehicles that are equipped with OCS (electric field occupant classification sensor).
B1447: OC Passenger ECU Defect
B1448: OC Passenger Sensor Mat Defect
B1764: BodySense MAT Defect
B1767: BodySense Algo Cut-Off
MODEL MODEL YEARS PRODUCTION DATES
Sorento (XM) 2011 to current all 2011 MY to current
Optima (MG) 2009, 2010 August 28, 2008, to current
Rio (JB) 2010 to current March 3, 2010, to current
The purpose of this TSB is to ensure a proper response to the appearance of certain DTCs that identify a temporary condition. On these vehicles, the occupant detection and classification system uses an electric field sensor instead of a pressure sensor. The customer is advised in the owner’s manual not to place any electronic device on or near the seat cushion because it can defeat the OCS. The electric field sensor is sensitive to interference from certain electronic devices and is also sensitive to a wet seat.
If certain electronic devices such as cellular phones, laptop computers, inverters, DVD players, radio transmitters, GPS navigation systems, satallite radio systems, video games, and MP3 players are placed on or near a passenger seat cushion (including seatback pocket), or if liquid is spilled on the seat cushion, the airbag warning lamp may illuminate with the afore-mentioned DTCs.
Verify that the seat cushions are dry. Verify that nearby electronic devices are turned off. Clear the DTC(s). If the DTC(s) do not re-code, review the warnings listed in the owner’s manual with the customer. If DTC(s) do re-code, proceed with diagnosis according to Service Information on the KGIS.