LS430 − OUTLINE OF NEW FEATURES 11 22. Key Reminder Master ECU has been changed from the theft deterrent ECU to the transponder key ECU. Combination Meter Combination Meter 2 Meter ECU BEAN Transponder Key ECU Meter ECU BEAN Theft Deterrent ECU Buzzer Key Unlock Warning Switch Buzzer Key Unlock Warning Switch ’04 LS430 ’03 LS430 259LSW30 259LSW30 23. SRS Airbag System The SRS airbag system has been changed as follows. For details, see page 180. Item Outline Airbag Sensor Assembly The circuits have been changed due to the adoption of CAN (Controller Area Network) communication.
On the model with the Lexus link system, the airbag deployment signal, which is transmitted to the mayday ECU, has been changed from a single circuit to a dual circuit, as a measure against wiring damage sustained during an impact. Airbag for Frontal Collision Knee airbag for the driver and front passenger have been adopted. A SRS knee airbag is added to the undeployed airbag controlled by the conventional airbag limit function for front passenger. Airbag Limit Function (for Front Passenger): Detects if the seat belt is used and an occupant sit in the front passenger seat.
If the occupant does not sit in the front passenger seat, the function does not allow the airbag (without curtain shield) and seat belt pretentioner for front passenger. Airbag for Side Collision The size of the side airbag has been increased. Diagnosis As the communication speed of diagnosis has been increased, all DTC (Diagnostic Trouble Codes) have been reassigned. For details, see the 2004 LEXUS LS430 Repair Manual (Pub. No. RM1048U).