Occupant Classification System (Diagnostics - Introduction): Other Lexus GS IV

PRECAUTION [03/2012 - ]

1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTE: After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Refer to «PRECAUTION [03/2012 - ]»(ref-600412-S33693534232014022400000) . When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION [03/2012 - ]»(ref-600412-S41156157812014022400000) .
2. GENERAL PRECAUTION Perform zero point calibration and sensitivity check if any of the following conditions occur: The occupant detection ECU is replaced. Accessories (seatback tray and seat cover, etc.) are installed. The front passenger seat is removed from the vehicle. One of the bolts that is used to install the front passenger seat is removed and reinstalled. The passenger airbag ON/OFF indicator ("OFF") comes on when the front passenger seat is not occupied. The vehicle is brought to the workshop for repair due to an accident or a collision.

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INITIALIZATION [03/2012 - ]

Note. 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 conditions occur

1. The occupant detection ECU is replaced.
2. Accessories (seatback tray and seat cover, etc.) are installed.
3. The front passenger seat is removed from the vehicle.
4. One of the bolts that is used to install the front passenger seat is removed.
5. The vehicle is brought to the workshop for repair due to an accident or a collision.

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1. ZERO POINT CALIBRATION AND SENSITIVITY CHECK Zero point calibration and sensitivity check procedure HINT: Make sure that zero point calibration has finished normally, and then perform the sensitivity check. Check that both of the following conditions are met: The vehicle is parked on a level surface. No objects are placed on the front passenger seat. Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Occupant Detection / Utility / Zero Point Calibration & Sensitivity Check. Adjust the seat position according to the table below. Adjustment Item Position Slide Direction* See illustration Headrest Height Follow the prompts on the Techstream screen. Front Vertical Height Rear Lifter Height Recline Angle HINT: *: Move the seat forward until the seat bracket and the seat rail are flush, as shown in the illustration below (A position). TEXT IN ILLUSTRATION *1 Seat Rail *2 Seat Bracket Perform zero point calibration and sensitivity check by following the prompts on the Techstream screen. OK "Zero Point Calibration is complete." and "Sensitivity Check is complete." are displayed. HINT: Refer to the Techstream operator's manual for further details. If zero point calibration does not complete, replace the front seat adjuster assembly RH. When performing sensitivity check, use a solid metal weight (the check result may not appear properly if a liquid weight is used). If sensitivity deviates from the specified range, retighten the bolts of the front passenger seat without deforming the seat rail. After performing this procedure, if sensitivity is not within the specified range, replace the front seat adjuster assembly RH.

FAIL-SAFE CHART [03/2012 - ]

1. FAIL SAFE FUNCTION The following chart shows the status of the controls when the system is normal and malfunctioning. The passenger airbag ON/OFF indicator ("ON" and "OFF") comes on for approximately 4 seconds, and then goes off for approximately 2 seconds. Approximately 6 seconds after the power switch is turned on (IG), the passenger airbag ON/OFF indicator will indicate ON or OFF depending on the conditions listed below. Condition ON Indicator OFF Indicator Instrument Panel Passenger Airbag Lower No. 2 Instrument Panel Airbag Front Seat Side Airbag RH Rear Seat Side Airbag RH Curtain Shield Airbag RH Front Seat Belt Pretensioner RH Adult is seated. On Off o o o o o o Child is seated. Off On X X o o o o Child restraint system is installed. Off On X X o o o o Vacant Off On X X o o o o Failure Off On X X o o o o o: Deployable X: Not deployable