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

Description
The side airbag sensor rh consists of parts 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 b1627/82 is set when a malfunction is detected in the side airbag sensor rh
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 rh and the side
airbag sensor rh.
Ok:
the connectors are properly connected.


- Check floor wire (open)

- Disconnect the connectors from the center airbag sensor
and the side airbag sensor rh.
- Using a service wire, connect l10-4 (bbr+) and l10-3
(bbr-) 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
connectors.
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 rh

- 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 rh consists of parts including the diagnostic circuit
and the lateral deceleration
sensor.
When the center airbag sensor receives signals from the lateral ...
Description
The side airbag sensor rh consists of parts including the diagnostic circuit
and the lateral deceleration
sensor.
When the center airbag sensor receives signals from the lateral ...
Other materials:
Identification information
Vehicle identification and serial numbers
Vehicle identification number
The vehicle identification number is stamped on the
vehicle identification number plate and on the
certification label, as shown in the illustrations.
Vehicle identification number plate
Certification label ...
Front airbag sensor
Components
On-vehicle inspection
Check front airbag sensor (vehicle not
involved in collision and airbag not
deployed)
Perform a diagnostic system check (see page rs-
49).
Check front airbag sensor (vehicle
involved in collision and airbag has not
deployed)
Perfo ...
Ig2 relay
On-vehicle inspection
Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.
Remove ig2 relay
Remove the no. 1 Engine room re ...