Lexus NX: System Description
SYSTEM DESCRIPTION
GENERAL
(a) In the occupant classification system, the occupant detection ECU calculates the weight of the occupant based on signals from the occupant classification sensors. This system recognizes the occupant as a child if it detects a weight of less than 17 kg (37.4 lb) on the front passenger seat, and then disables the instrument panel passenger airbag, front seat cushion airbag assembly RH.
(b) This system is mainly comprised of front and rear occupant classification sensors LH that detect the load on the front passenger seat. The occupant detection ECU controls the system, and the passenger airbag ON/OFF indicator indicates the ON/OFF condition of the instrument panel passenger airbag, front seat cushion airbag assembly RH.
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How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the occupant classification system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEX
Initialization
INITIALIZATION NOTICE: Make sure that the front passenger seat is not occupied before performing the operation. HINT: Perform zero point calibration and sensitivity check if any of the following cond
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of
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Removal
REMOVAL PROCEDURE 1. REMOVE QUARTER OUTSIDE MOULDING SUB-ASSEMBLY RH Click here 2. REMOVE QUARTER OUTSIDE MOULDING SUB-ASSEMBLY LH Click here 3. REMOVE REAR FLOOR SIDE MEMBER COVER Click here 4. REMOVE REAR BUMPER COVER Click here 5. REMOVE ELECTRICAL KEY ANTENNA NOTICE: Do not reuse dro
Installation
INSTALLATION PROCEDURE 1. INSTALL STEERING PAD ASSEMBLY (a) Check that the power switch is off. (b) Check that the cable is disconnected from the negative (-) auxiliary battery terminal. CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal
