Toyota RAV4 manuals

Toyota RAV4 (XA40) 2013-2018 Service Manual: Rear occupant classification sensor lh collision detection

Description

Dtc b1787 is output when the occupant classification ecu receives a collision detection signal sent by the rear occupant classification sensor lh when an accident occurs.

Dtc b1787 is also output when the front seat assembly rh is subjected to a strong impact, even if an actual accident does not occur.

However, when the occupant classification ecu outputs a collision detection signal, even if the vehicle is not in a collision, dtc b1787 can be cleared by performing the zero point calibration and sensitivity check.

Therefore, when dtc b1787 is output, first perform the zero point calibration and sensitivity check.

Toyota RAV4. Rear occupant classification sensor lh collision detection


Wiring diagram

Toyota RAV4. Rear occupant classification sensor lh collision detection


Inspection procedure

  1. Perform zero point calibration

  1. Connect the intelligent tester to the dlc3.
  2. Turn the ignition switch on.
  3. Using the intelligent tester, perform the zero point calibration (see page rs-241).

Ok: completed is displayed.



  1. Perform sensitivity check

  1. Using the intelligent tester, perform the sensitivity check (see page rs-241).

Standard value: 27 to 33 kg (59.52 To 72.75 Lb)


  1. Check for dtc

  1. Turn the ignition switch on.
  2. Clear the dtcs (see page rs-249).

Hint

First clear dtcs stored in the occupant classification ecu and then in the center airbag sensor.

  1. Turn the ignition switch off.
  2. Turn the ignition switch on.
  3. Check the dtcs (see page rs-249).

Ok: dtc b1787 is not output.

Hint:

Dtcs other than dtc b1787 may be output at this time, but they are not related to this check.



  1. Replace front seat assembly rh

  1. Turn the ignition switch off.
  2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
  3. Replace the front seat rh (see page se-27).

Hint:

Perform the inspection using parts from a normal vehicle if possible.


  1. Perform zero point calibration

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
  2. Connect the intelligent tester to the dlc3.
  3. Turn the ignition switch on.
  4. Using the intelligent tester, perform the zero point calibration (see page rs-241).

Ok: completed is displayed.



  1. Perform sensitivity check

  1. Using the intelligent tester, perform the sensitivity check (see page rs-241).

Standard value: 27 to 33 kg (59.52 To 72.75 Lb)



  1. Check for dtc

  1. Turn the ignition switch on.
  2. Clear the dtcs (see page rs-249).

Hint:

First clear dtcs stored in the occupant classification ecu and then in the center airbag sensor.

  1. Turn the ignition switch off.
  2. Turn the ignition switch on.
  3. Check the dtcs (see page rs-249).

Ok: dtc b1787 is not output.

Hint:

Dtcs other than dtc b1787 may be output at this time, but they are not related to this check.



  1. Replace occupant classification ecu

  1. Turn the ignition switch off.
  2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
  3. Replace the occupant classification ecu (see page rs- 250).


  1. Perform zero point calibration

  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
  2. Connect the intelligent tester to the dlc3.
  3. Turn the ignition switch on.
  4. Using the intelligent tester, perform the zero point calibration (see page rs-241).

Ok: completed is displayed.


  1. Perform sensitivity check

  1. Using the intelligent tester, perform the sensitivity check (see page rs-241).

Standard value: 27 to 33 kg (59.52 To 72.75 Lb)


End

Front occupant classification sensor rh collision detection
Description Dtc b1786 is output when the occupant classification ecu receives a collision detection signal sent by the front occupant classification sensor rh when an accident occurs. Dtc b ...

Rear occupant classification sensor rh collision detection
Description Dtc b1788 is output when the occupant classification ecu receives a collision detection signal sent by the rear occupant classification sensor rh when an accident occurs. Dtc b1 ...

Other materials:

Removal
Hint: Use the same procedures for the rh side and lh side. The procedures listed below are for the rh side. Remove no. 2 Seat hinge cover lh Fully tilt the seatback forward. Attach the 2 claws and clip. Pull the hinge cover in the direction indicated by the arrow ...

Closing the fuel tank cap
After refueling, turn the fuel tank cap until you hear a click. Once the cap is released, it will turn slightly in the opposite direction. Caution When replacing the fuel tank cap Do not use anything but a genuine toyota fuel tank cap designed for your vehicle. Doing so may cause a fire ...

RCTA (Rear Cross Traffic Alert) function
The RCTA function uses the BSM rear side radar sensors installed behind the rear bumper. This function is intended to assist the driver in checking areas that are not easily visible when backing up. WARNING â– Cautions regarding the use of the system The driver is solely responsible for safe driving ...

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