Restraints - SRS/Air Bag OFF Lamps ON/DTC B1785
ELECTRICALEL007-05
REVISED
Title:
OCCUPANT CLASSIFICATION SYSTEM:
DTC B1785
Models:
'04 ES 330 & RX 330
May 23, 2005
TSIB REVISION NOTICE:
^ August 3, 2007: Applicable Warranty has been updated.
Previous versions of this TSIB should be discarded.
Introduction
Some customers may complain that the SRS and Passenger Airbag OFF indicator lights remain on. If Occupant Detection DTC B1785 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 customers.
Applicable Vehicles
^ 2004 model year ES 330 and RX 330 vehicles produced BEFORE the Production Change Effective VINs shown below.
Production Change Information
Warranty Information
This repair is covered under the Lexus Powertrain Warranty. This warranty is in effect for 72 months or 70,000 miles, whichever occurs first, from the vehicle's in-service date.
* Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Required SSTs
Parts Information
Repair Procedure
1. Confirm "Occupant Detect" DTC B1785 using the Lexus 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 TSIB No. EL007-03, "0ccupancy Classification System Calibration (DTC B1150 & B1650)," and clear codes.
4. Replace seat assembly if DTC B1785 is found.
^ 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 parts can be installed. Perform system initialization per TSIB No. EL007-03, "Occupancy Classification System Calibration (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