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:
Internal control module random access memory (ram) error
Description
The ecm continuously monitors its own internal memory status, internal
circuits, and output signals
transmitted to the throttle actuator. This self-check ensures that the ecm is
functioning properly. If any
malfunction is detected, the ecm sets the appropriate dtc and illumina ...
Occupant classification ecu
Components
On-vehicle inspection
Inspect occupant classification ecu
(vehicle not involved in collision)
Perform a diagnostic system check (see page rs-
236).
Inspect occupant classification ecu
(vehicle involved in collision)
Perform a diagnostic system check (see p ...
Problem symptoms table (2005/11-2006/01)
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms are
listed in order of probability in the "suspected area" column of
the table. Check each symptom by checking the suspected
areas in the order they are listed. Replace p ...