Toyota RAV4 (XA40) 2013-2018 Service Manual: Lost communication with front satellite sensor bus rh
![Toyota RAV4. Lost communication with front satellite sensor bus rh](images/books/256/63/4.htm98.jpg)
Description
The front airbag sensor rh consists of the diagnostic circuit and the frontal
deceleration sensor.
If the center airbag sensor receives signals from the frontal deceleration
sensor, it determines whether or
not the srs should be activated.
Dtc b1602/83, b1603/83, b1612/83 or b1613/83 is recorded when a malfunction is
detected in the front
airbag sensor rh circuit.
![Toyota RAV4. Lost communication with front satellite sensor bus rh](images/books/256/63/4.htm99.jpg)
Wiring diagram
![Toyota RAV4. Lost communication with front satellite sensor bus rh](images/books/256/63/4.htm28.jpg)
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 and the front airbag sensor rh.
Ok:
the connectors are connected.
![](images/books/256/63/4.htm3.gif)
- Check front airbag sensor rh circuit (open)
![Toyota RAV4. Check front airbag sensor rh circuit (open)](images/books/256/63/4.htm29.jpg)
- Disconnect the connectors from the center airbag sensor
and the front airbag sensor rh.
- Using a service wire, connect a29-2 (+sr) and a29-1 (-
sr) of connector e.
Notice:
Do not forcibly insert a service wire into the
terminals of the connector when connecting.
- Measure the resistance of the wire harness side
connector.
Standard resistance
![](images/books/256/63/4.htm42.jpg)
![](images/books/256/63/4.htm7.gif)
- Check front airbag sensor rh circuit (short)
![Toyota RAV4. Check front airbag sensor rh circuit (short)](images/books/256/63/4.htm43.jpg)
- Disconnect the service wire from connector e.
- Measure the resistance of the wire harness side
connector.
Standard resistance
![](images/books/256/63/4.htm45.jpg)
![](images/books/256/63/4.htm11.gif)
- Check front airbag sensor rh circuit (to b+)
![Toyota RAV4. Check front airbag sensor rh circuit (to b+)](images/books/256/63/4.htm46.jpg)
- 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
![](images/books/256/63/4.htm48.jpg)
![](images/books/256/63/4.htm15.gif)
- Check front airbag sensor rh circuit (to ground)
![Toyota RAV4. Check front airbag sensor rh circuit (to ground)](images/books/256/63/4.htm49.jpg)
- 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
![](images/books/256/63/4.htm50.jpg)
![](images/books/256/63/4.htm19.gif)
- Check front airbag sensor rh
![Toyota RAV4. Check front airbag sensor rh](images/books/256/63/4.htm52.jpg)
- Connect the connectors to the center airbag sensor .
- Interchange the front airbag sensor rh and 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 the dtcs (see page rs-49).
Result ![](images/books/256/63/4.htm53.jpg)
Hint:
Dtcs other than dtc b1602/83, b1603/83, b1612/83,
b1613/83, b1607/84, b1608/84, b1617/84 and b1618/
84 may be output at this time, but they are not related to
this check.
![](images/books/256/63/4.htm54.jpg)
Use simulation method to check
- Check engine room main wire (open)
![Toyota RAV4. Check engine room main wire (open)](images/books/256/63/4.htm55.jpg)
- Disconnect the service wire from connector e.
- Disconnect the engine room main wire connector from
the instrument panel wire.
- Using a service wire, connect ae9-2 (+sr) and ae9-1 (-
sr) of connector d.
Notice:
Do not forcibly insert a service wire into the
terminals of the connector when connecting.
- Measure the resistance of the wire harness side
connector.
Standard resistance
![](images/books/256/63/4.htm56.jpg)
![](images/books/256/63/4.htm27.gif)
Repair or replace instrument panel wire
- Check engine room main wire (short)
![Toyota RAV4. Check engine room main wire (short)](images/books/256/63/4.htm57.jpg)
- Disconnect the engine room main wire connector from
the instrument panel wire.
- Disconnect the service wire from connector e.
- Measure the resistance of the wire harness side
connector.
Standard resistance![](images/books/256/63/4.htm59.jpg)
![](images/books/256/63/4.htm30.gif)
![](images/books/256/63/4.htm31.gif)
Repair or replace instrument panel wire
- Check engine room main wire (to b+)
![Toyota RAV4. Check engine room main wire (to b+)](images/books/256/63/4.htm60.jpg)
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery
terminal, and wait for at least 90 seconds.
- Disconnect the engine room main wire connector from
the instrument panel wire.
- 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
![](images/books/256/63/4.htm61.jpg)
![](images/books/256/63/4.htm34.gif)
![](images/books/256/63/4.htm35.gif)
Repair or replace instrument panel wire
- Check engine room main wire (to ground)
![Toyota RAV4. Check engine room main wire (to ground)](images/books/256/63/4.htm74.jpg)
- Disconnect the engine room main wire connector from
the instrument panel wire.
- Measure the resistance of the wire harness side
connector.
Standard resistance
![](images/books/256/63/4.htm87.jpg)
![](images/books/256/63/4.htm39.gif)
Repair or replace instrument panel wire
Description
The center airbag sensor consists of the airbag sensor, the safing sensor,
the drive circuit, the diagnosis
circuit and the ignition control.
If the center airbag sensor receive ...
Description
The front airbag sensor lh consists of the diagnostic circuit and the frontal
deceleration sensor.
If the center airbag sensor receives signals from the frontal deceleration
se ...
Other materials:
Installation
Install throttle body
Install a new gasket onto the intake manifold.
Install the throttle body and fuel pipe clamp with the
4 bolts.
Torque: 30 n*m (305 kgf*cm, 22 ft.*Lbf)
Connect the fuel tube into the clamp.
Connect the wire harness clamp.
Connect the throttle posi ...
Open in occupant classification ecu battery positive line
Description
Dtc b1794 is set when a malfunction is detected in the occupant
classification ecu battery positive line.
Wiring diagram
Inspection procedure
Check for dtc
Turn the ignition switch on.
Clear the dtcs (see page rs-249).
Hint:
First clear dtcs stored in the ...
Disassembly
Hint:
When removing the ornament plate and emblem, heat the
radiator grille, ornament plate and emblem using a heat light.
Standard heating temperature
Notice:
Do not heat the radiator grille, ornament plate and
emblem excessively.
Remove hood to radiator grille seal
Remove th ...