Restraints - OCS System Initialization

COLLISION REPAIR INFORMATION
FOR THE COLLISION REPAIR PROFESSIONAL

TITLE: SRS OCCUPANT CLASSIFICATION SYSTEM INITIALIZATION

SECTION: ELECTRICAL BULLETIN # 177

MODELS: ALL EQUIPPED TOYOTA LEXUS and SCION MODELS

DATE: MARCH 2010

Models equipped with a Supplemental Restraint System (SRS) Occupant Classification System (OCS) will enable or disable the passenger front and side airbags based on seat occupancy passenger weight and seat belt latch engagement.

If an equipped vehicle sustains collision damage or if the front passenger seat or any of the OCS components are serviced the SRS Malfunction Indicator Light (MIL) may illuminate setting a Diagnostic Trouble Code (DTC).

NOTE:
It is necessary to diagnose and repair the root cause of a SRS or OCS DTC before initializing the OCS system. If SRS and OCS DTC's are not cleared the system may not operate properly.

Be sure to check and clear DTC's and perform OCS initialization per repair manual instructions with a Techstream Special Service Tool (SST) or capable diagnostic tester.

Any of the following conditions could set a DTC illuminate the SRS MIL or cause the PASSENGER AIRBAG light to indicate incorrectly regardless of occupancy:

^ The OCS Electronic Control Unit (ECU) is replaced

^ Accessories such as a seatback tray are installed on the passenger seat

^ The passenger seat is removed and replaced or reinstalled

^ The vehicle is involved in an accident or collision

Model-specific repair manuals can be accessed through the Technical Information System (TIS) www.techinfo.toyota.com