Tacoma Regular Cab 4WD L4-2.7L (3RZ-FE) (1999)
Seat Occupant Sensor: Technical Service Bulletins
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).
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
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