Toyota RAV4 (XA40) 2013-2018 Service Manual: Seat position airbag sensor circuit malfunction
![Toyota RAV4. Seat position airbag sensor circuit malfunction](images/books/256/64/4.htm171.jpg)
Description
The seat position sensor circuit consists of the center airbag sensor and the
seat position sensor.
Dtc b1653/35 is recorded when a malfunction is detected in the seat position
sensor circuit.
![Toyota RAV4. Seat position airbag sensor circuit malfunction](images/books/256/64/4.htm172.jpg)
Wiring diagram
![Toyota RAV4. Seat position airbag sensor circuit malfunction](images/books/256/64/4.htm173.jpg)
Inspection procedure
- Check for dtc
![Toyota RAV4. Check for dtc](images/books/256/64/4.htm174.jpg)
- 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).
Ok:
dtc b1653/35 is not output.
Hint:
Dtcs other than dtc b1653/35 may be output at this
time, but they are not related to this check.
![](images/books/256/64/4.htm145.gif)
- 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 seat position sensor.
Ok:
the connectors are properly connected.
![](images/books/256/64/4.htm147.gif)
- Check seat position sensor circuit (open)
![Toyota RAV4. Check seat position sensor circuit (open)](images/books/256/64/4.htm175.jpg)
- Disconnect the connectors from the center airbag sensor
and the seat position sensor.
- Using a service wire, connect 2 and 1 of connector e.
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:
W/o curtain shield airbag ![](images/books/256/64/4.htm176.jpg)
W/ curtain shield airbag ![](images/books/256/64/4.htm177.jpg)
![](images/books/256/64/4.htm149.gif)
- Check seat position sensor circuit (short)
![Toyota RAV4. Check seat position sensor circuit (short)](images/books/256/64/4.htm178.jpg)
- Disconnect the service wire from connector e.
- Measure the resistance of the wire harness side
connector.
Standard resistance ![](images/books/256/64/4.htm179.jpg)
![](images/books/256/64/4.htm151.gif)
- Check seat position sensor circuit (to b+)
![Toyota RAV4. Check seat position sensor circuit (to b+)](images/books/256/64/4.htm180.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/256/64/4.htm181.jpg)
![](images/books/256/64/4.htm153.gif)
- Check seat position sensor circuit (to ground)
![Toyota RAV4. Check seat position sensor circuit (to ground)](images/books/256/64/4.htm182.jpg)
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery
terminal, and wait for at least 90 seconds.
- Measure the voltage of the wire harness side connector.
Standard resistance ![](images/books/256/64/4.htm183.jpg)
![](images/books/256/64/4.htm155.gif)
- Check seat position sensor
![Toyota RAV4. Check seat position sensor](images/books/256/64/4.htm184.jpg)
- Connect the connectors to the center airbag sensor and
the seat position sensor.
- 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).
Ok:
dtc b1653/35 is not output.
Hint:
Dtcs other than dtc b1653/35 may be output at this
time, but they are not related to this check.
![](images/books/256/64/4.htm156.gif)
![](images/books/256/64/4.htm157.gif)
- Replace seat position sensor
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery
terminal, and wait for at least 90 seconds.
- Replace the seat position sensor (see page rs-389).
Hint:
Perform the inspection using parts from a normal vehicle
if possible.
- Check center airbag sensor assembly
![Toyota RAV4. Check center airbag sensor assembly](images/books/256/64/4.htm185.jpg)
- 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).
Ok:
dtc b1653/35 is not output.
Hint:
Dtcs other than dtc b1653/35 may be output at this
time, but they are not related to this check.
![](images/books/256/64/4.htm160.gif)
End
- Check floor wire (open)
![Toyota RAV4. Check floor wire (open)](images/books/256/64/4.htm186.jpg)
- Disconnect the front seat inner belt connector from the
flow wire.
- Using a service wire, connect k4-1 (lsp+) and k4-2
(lsp-) 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:
W/o curtain shield airbag ![](images/books/256/64/4.htm187.jpg)
W/ curtain shield airbag ![](images/books/256/64/4.htm188.jpg)
![](images/books/256/64/4.htm162.gif)
Replace front seat inner belt assembly lh
- Check floor wire (short)
![Toyota RAV4. Check floor wire (short)](images/books/256/64/4.htm189.jpg)
- Disconnect the front seat inner belt connector from the
floor wire.
- Measure the resistance of the wire harness side
connector.
Standard resistance ![](images/books/256/64/4.htm190.jpg)
![](images/books/256/64/4.htm164.gif)
Replace front seat inner belt assembly lh
- Check floor wire (to b+)
![Toyota RAV4. Check floor wire (to b+)](images/books/256/64/4.htm191.jpg)
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery
terminal, and wait for at least 90 seconds.
- Disconnect the front seat inner belt connector from the
floor 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
connectors.
Standard voltage ![](images/books/256/64/4.htm192.jpg)
![](images/books/256/64/4.htm166.gif)
Replace front seat inner belt assembly lh
- Check floor wire (to ground)
![Toyota RAV4. Check floor wire (to ground)](images/books/256/64/4.htm193.jpg)
- Disconnect the front seat inner belt connector from the
floor wire.
- Measure the resistance of the wire harness side
connectors.
Standard resistance![](images/books/256/64/4.htm194.jpg)
![](images/books/256/64/4.htm168.gif)
Replace front seat inner belt assembly lh
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 occup ...
Description
The driver side seat belt buckle switch circuit consists of the center airbag
sensor and the front seat inner
belt lh.
Dtc b1655/37 is recorded when a malfunction is detected in ...
Other materials:
Fastening and releasing
the seat belt
To fasten the seat belt, push
the plate into the buckle until a click sound is heard.
To release the seat belt,
press the release button A.
â– Emergency locking retractor
(ELR)
The retractor will lock the belt during
a sudden stop or on impact. It may
also lock if you lean forward too
quickly ...
Tire and wheel system
Inspection
Inspect tire
Check the tires for wear and proper inflation
pressure.
Standard cold tire inflation pressure:
220 kpa (2.2 Kgf/cm2, 32 psi)
Using a dial indicator, check the runout of the tires.
Standard tire runout:
1.0 Mm (0.039 In.) Or less
Rotate tire
...
Driving the vehicle
The following procedures
should be observed to
ensure safe driving:
Driving procedure
â– Driving
1. With the brake pedal
depressed, shift the shift
lever to D.
2. Release the parking brake.
If the parking brake is in automatic
mode, the parking brake will be
released automatically.
3. Gradually re ...