Canada - Restraints - Lamps On/OCS DTC's Set

Bulletin
TSB2120R

Issue Date
June 01, 2005

Market
Canada


Title
OCCUPANT CLASSIFICATION SYSTEM: DTC B1785, B1786, B1787 OR B1788

Component
BODY ELECTRICAL

Models
'05 Corolla & Matrix

TSB REVISION NOTICE:
- August 24, 2006: DTCs B1786, B1787, and B1788 have been added to the TSB.
Previous versions of this TSB should be discarded.

INTRODUCTION:

Some customers may complain that the SRS and Passenger Airbag OFF indicator lights remain on. If Occupant Detection (DTC) B1785, B1786, B1787 or B1788 is found, confirm the vehicle was not involved in a collision and no foreign object is lodged under the seat assembly.

If this is not the case, a customer may have lifted the seat frame by exerting extra force on the seatback. The following repair will replace the existing seat for one calibrated for heavier--set customers.

APPLICABLE VEHICLES:
- 2005 model year Corolla and Matrix vehicles produced BEFORE the Production Change Effective VINs shown in this TSB.






PRODUCTION CHANGE INFORMATION:






WARRANTY INFORMATION:






PARTS INFORMATION:






REQUIRED SSTs:

REPAIR PROCEDURE:

1. Confirm "Occupant Detect" DTC B1785, B1786, B1787 or B1788 using the Toyota Diagnostic Tester.
2. Confirm vehicle was not involved in a collision.*
3. Confirm nothing is wedged under the seat.*

* In case of a legitimate collision detection, perform system initialization per repair manual or TSB No. 1337 "Occupant Classification System Initialization (DTC B1150 & B1650), "and clear codes.

4. Replace seat frame if DTC B1785, B1785, B1786, B1787 or B1788 is found.
A. If seat is not equipped with a side airbag replace the seat frame assembly.
B. If seat is equipped with a side airbag replace the entire seat assembly.

NOTE:
- Once the Occupant Classification System is re-initialized, the system will resume proper operation. The person identified to be setting the failure code should be restricted to sitting in the back seat until the new (ordered) parts can be installed. Perform system initialization per TSB No. 1337, "Occupant Classification System Initialization (DTC B1150 & B1650),"and clear codes.
- Due to logistical difficulties in stocking seat assemblies please prepare customers for potentially long wait times for service parts. Order parts VOR to ensure new seat and seat frames are delivered as quickly as possible.

TECHNICAL NOTE: