Toyota RAV4 manuals

Toyota RAV4 Service Manual: Lost communication with driver side - side airbag sensor assembly

Toyota RAV4 Service Manual / Supplemental restraint system / Airbag system / Diagnostic trouble code chart / Lost communication with driver side - side airbag sensor assembly

Toyota RAV4. Lost communication with driver side - side airbag sensor assembly


Description

The side airbag sensor lh consists of part including the diagnostic circuit and the lateral deceleration sensor.

When the center airbag sensor receives signals from the lateral deceleration sensor, it determines whether or not the srs should be activated.

Dtc b1622/81 is set when a malfunction is detected in the side airbag sensor lh circuit.

Toyota RAV4. Lost communication with driver side - side airbag sensor assembly


Wiring diagram

Toyota RAV4. Lost communication with driver side - side airbag sensor assembly


Inspection procedure

  1. Check connection of connector

  1. Turn the ignition switch off.
  2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
  3. Check that the connectors are properly connected to the center airbag sensor, rear airbag sensor lh and the side airbag sensor lh.

Ok: the connectors are properly connected.


  1. Check floor wire (open)

Toyota RAV4. Check floor wire (open)


  1. Disconnect the connectors from the center airbag sensor and the side airbag sensor lh.
  2. Using a service wire, connect k8-4 (bbl+) and k8-3 (bbl-) of connector c.

Notice:

Do not forcibly insert the service wire into the terminals of the connector when connecting.

  1. Measure the resistance of the wire harness side connector.

Standard resistance



  1. Check floor wire (short)

Toyota RAV4. Check floor wire (short)


  1. Disconnect the service wire from connector c.
  2. Measure the resistance of the wire harness side connector

Standard resistance



  1. Check floor wire (to b+)

Toyota RAV4. Check floor wire (to b+)


  1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
  2. Turn the ignition switch on.
  3. Measure the voltage of the wire harness side connector.

standard voltage



  1. Check floor wire (to ground)

Toyota RAV4. Check floor wire (to ground)


  1. Turn the ignition switch off.
  2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
  3. Measure the resistance of the wire harness side connector.

Standard resistance



  1. Check side airbag sensor lh

Toyota RAV4. Check side airbag sensor lh


  1. Connect the connectors to the center airbag sensor.
  2. Interchange the side airbag sensor rh with the side airbag sensor lh and connect the connectors to them.
  3. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
  4. Turn the ignition switch on, and wait for at least 60 seconds.
  5. Clear the dtcs (see page rs-49).
  6. Turn the ignition switch off.
  7. Turn the ignition switch on, and wait for at least 60 seconds.
  8. Check for dtcs (see page rs-49).

Result



Hint:

Dtcs other than dtc b1622/81 and b1627/82 may be output at this time, but they are not related to this check.

Use simulation method to check

Driver side - side airbag sensor circuit malfunction
Description The side airbag sensor lh consists of part including the diagnostic circuit and the lateral deceleration sensor. When the center airbag sensor receives signals from the lateral ...

Driver side - side airbag sensor assembly initialization incomplete
Description The side airbag sensor lh consists of part including the diagnostic circuit and the lateral deceleration sensor. When the center airbag sensor receives signals from the lateral ...

Other materials:

Maintenance requirements
To ensure safe and economical driving, day-to-day care and regular maintenance are essential. It is the owner’s responsibility to perform regular checks. Toyota recommends the following maintenance: General maintenance General maintenance should be performed on a daily basis. This can be done ...

Occupant classification system malfunction
Description The occupant classification system circuit consists of the center airbag sensor and the occupant classification system. When the center airbag sensor receives signals from the occupant classification ecu, it determines whether or not the front passenger airbag, front seat side ...

Only rear door rh lock / unlock functions do not operate
Description The main body ecu receives lock / unlock switch signals and activates the door lock motor accordingly. Wiring diagram Inspection procedure Inspect rear door with motor lock assembly rh Apply the battery voltage to the door lock motor and check the operation of th ...

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