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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Low Output Signal of Rear Speed Sensor RH (C1273,C1274,C1466,C1467)
DESCRIPTION Each speed sensor detects the wheel speed and sends the signals to the skid control ECU (brake booster with master cylinder assembly). These signals are used for ABS control. DTCs C1273 and C1274 are cleared when the speed sensor sends a wheel speed signal or when Test Mode ends. DTCs C1
Installation
INSTALLATION CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the parts may injure your hands. PROCEDURE 1. INSTALL BENCH TYPE REAR SEAT CUSHION COVER (REAR SEAT CUSHION HEATER) HINT:
When installing the seat cover, refer to the precautions in order to prevent wrinkles from
