Toyota RAV4 (XA40) 2013-2018 Service Manual: 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.

Wiring diagram

Inspection procedure
- Check connection of connector
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery
terminal, and wait for at least 90 seconds.
- 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.


- Check floor wire (open)

- Disconnect the connectors from the center airbag sensor
and the side airbag sensor lh.
- 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.
- Measure the resistance of the wire harness side
connector.
Standard resistance


- Check floor wire (short)

- Disconnect the service wire from connector c.
- Measure the resistance of the wire harness side
connector
Standard resistance


- Check floor wire (to b+)

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


- Check floor wire (to ground)

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


- Check side airbag sensor lh

- Connect the connectors to the center airbag sensor.
- Interchange the side airbag sensor rh with the side
airbag sensor lh and connect the connectors to them.
- Connect the cable to the negative (-) battery terminal,
and wait for at least 2 seconds.
- Turn the ignition switch on, and wait for at least 60
seconds.
- Clear the dtcs (see page rs-49).
- Turn the ignition switch off.
- Turn the ignition switch on, and wait for at least 60
seconds.
- 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
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 ...
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:
System description
Engine immobiliser system description
The engine immobiliser system is designed to prevent
the vehicle from being stolen. This system uses a
transponder key ecu that stores the key codes of
authorized ignition keys. If an attempt is made to start
the engine using an unauthorized key, the e ...
Light bulbs
You may replace the following bulbs by yourself. The difficulty
level of replacement varies depending on the bulb. If necessary
bulb replacement seems difficult to perform, contact your
toyota dealer.
For more information about replacing other light bulbs, contact
your toyota dealer.
Prepari ...
Headlight dimmer switch
Precaution
Precaution for vehicle with srs
Some procedures in this section may affect the
supplemental restraint system (srs). Prior to
performing the procedures, read the srs section's
"precaution" (see page rs-1).
Components
Removal
Disconnect cable from negat ...