Toyota Tundra Service Manual: Initialization

INITIALIZATION

NOTICE:

Make sure that the front passenger seat is not occupied before performing the operation.

HINT:

Perform the zero point calibration and sensitivity check if any of the following conditions apply.

  • The occupant classification ECU is replaced.
  • Accessories (seatback tray and seat cover, etc.) are installed.
  • The front passenger seat is removed from the vehicle.
  • The passenger airbag ON/OFF indicator (OFF) comes on when the front passenger seat is not occupied.
  • An occupant classification sensor collision detection DTC is output due to an accident or a collision.

1. ZERO POINT CALIBRATION

(a) Zero point calibration procedures:

HINT:

Make sure that the zero point calibration has finished normally, and then perform the sensitivity check.

(1) Check that all of the following conditions are met:

  • The vehicle is parked on a level surface.
  • No objects are placed on the front seat RH.
  • The front seat inner belt RH (passenger side buckle switch) is off.

(2) Adjust the seat position in accordance with the table below.

Adjustment Item

Position

Slide Direction

Rearmost position

Reclining Angle

Upright position

Headrest Height

Lowest position

Lifter Height

Lowest position

(3) Connect the Techstream to the DLC3.

(4) Turn the ignition switch to ON.

(5) Perform the zero point calibration by following the prompts on the screen.

HINT:

  • Refer to the Techstream operator's manual for further details.
  • If the zero point calibration has not finished normally, replace the front seat frame with adjuster assembly RH.

2. SENSITIVITY CHECK

(a) Sensitivity check procedures:

(1) Connect the Techstream to the DLC3.

(2) Turn the ignition switch to ON.

(3) Perform the sensitivity check by following the prompts on the screen.

HINT:

Refer to the Techstream operator's manual for further details.

(4) Confirm that the beginning sensor reading is within the standard range.

Standard range:

-3.2 to 3.2 kg (-7.0 to 7.0 lb)

(5) Place a 30 kg (66.1 lb) weight (eg. a 30 kg (66.1 lb) of lead mass) onto the front passenger seat.

NOTICE:

  • Do not allow the weight to come into contact with the seatback when placing it on the seat cushion.
  • Place the weight in the area shown in the illustration.
Text in Illustration

*1

Weight Position

(6) Confirm that the sensitivity is within the standard range.

Standard range:

27 to 33 kg (59.5 to 72.8 lb)

HINT:

  • When performing the sensitivity check, use a solid metal weight (the check result may not be accurate if a liquid weight is used).
  • If the sensitivity deviates from the standard range, retighten the bolts of the front seat RH taking care not to deform the seat rail. After performing this procedure, if the sensitivity is not within the standard range, replace the front seat frame with adjuster assembly RH.
    How To Proceed With Troubleshooting

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