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:

Rear seats
Adjustment procedure Pull up the lever. Then lean back to the desired angle and release the lever. When a person sits in the rear center position, align all seatbacks at the same angle. Folding down the rear seatbacks Before folding down the rear seatbacks Stow the rear center seat bel ...

Camshaft position "A"
Dtc P0011 Camshaft position "a" - timing over-advanced or system performance (bank 1) Dtc  P0012 Camshaft position "a" - timing over-retarded (bank 1) Description The vvt system includes the ecm, oil control valve (ocv) and vvt controller. The ecm sends a target du ...

Rear drive shaft assembly
Components Removal Hint: Use the same procedures for the rh side and lh side. The procedures listed below are for the lh side. Disconnect cable from negative battery terminal Caution: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery termin ...

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