LS430 – NEW FEATURES 7 4. Dual-stage SRS Airbags System General 1 In this system, when the front airbag sensors and the airbag sensor assembly detect the front collision, the airbag sensor assembly judges the extent of impact, seat position and whether or not the seat belt is fasten, thus making the airbag inflating output optimum by delaying the inflating timing of the 2nd initiator and the 1st initiator. Seat Position Sensor The seat position sensor, which is attached to the seat rail of the driver seat, detects the sliding position of the seat. Seat Position Sensor A A Seat Rail Seat Position Sensor A – A Cross Section 213LS06 5.
Self-Diagnosis Function If the airbag sensor assembly detects a malfunction in the SRS airbag system, the airbag sensor assembly stores the malfunction data in memory, in addition to illuminating the SRS warning light. Then, the DTCs (Diagnostic Trouble Codes) can be accessed by connecting a hand-held tester to the DLC3 terminal or the SST (09843-18040) to the Tc and CG terminals of the DLC3 and reading the blinking of the SRS warning light. For further details, see the 2002 LEXUS LS430 Repair Manual (Pub. No. RM874U). The following DTC is newly added. DTC No.
Detection Item B1180/17 Short in D squib (2nd step) circuit B1181/18 Open in D squib (2nd step) circuit B1182/19 Short in D squib (2nd step) circuit (to ground) B1183/22 Short in D squib (2nd step) circuit (to B+) B1153/25 Seat position sensor assembly malfunction B0126/27 Seat belt buckle switch (LH) malfunction B0127/27 Seat belt buckle switch (LH) malfunction