Toyota RAV4 (XA40) 2013-2018 Service Manual: Occupant classification system malfunction
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 occupant classification ecu, it determines whether or not the front passenger airbag, front seat side airbag rh and seat belt pretensioner rh should be operated.
Dtc b1650/32 is set when a malfunction is detected in the occupant classification system circuit.
Wiring diagram
Inspection procedure
- Check for dtc (center airbag sensor)
- 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).
Ok: dtc b1650/32 is not output.
Hint:
Dtcs other than b1650/32 may be output at this time, but they are not related to this check.
- Check for dtc (occupant classification ecu)
- Turn the ignition switch on, and wait for at least 10 seconds.
- Using the intelligent tester (with can vim), check for dtcs of the occupant classification ecu (see page rs- 249).
Ok: dtc is not output.
- 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 occupant classification ecu.
Ok: the connectors are properly connected.
- Check floor wire (open)
- Disconnect the connectors from the center airbag sensor and occupant classification ecu.
- Using a service wire, connect l1-8 (fsr+) and l1-4 (fsr-) 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:
W/ curtain shield airbag 
W/o curtain shield airbag 
- Check floor wire (short)
- Disconnect the service wire from connector c.
- Measure the resistance of the wire harness side connector.
Standard resistance:
W/ curtain shield airbag
W/o curtain shield airbag 
- 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:
W/ curtain shield airbag 
W/o curtain shield airbag 
- 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:
W/ curtain shield airbag 
W/o curtain shield airbag 
- Check center airbag sensor assembly
- Replace the center airbag sensor (see page rs-374).
Hint:
Perform the inspection using parts from a normal vehicle when possible.
- Connect the connectors to the center airbag 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 for dtcs (see page rs-49).
Ok: dtc b1650/32 is not output.
Hint:
Dtcs other than b1650/32 may be output at this time, but they are not related to this check.
- Replace occupant classification ecu
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds
- Replace the occupant classification ecu (see page rs- 392).
- Perform zero point calibration
- Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
- Turn the ignition switch on.
- Using the intelligent tester, perform the zero point calibration (see page rs-241).
Ok: completed is displayed on the tester.
- Perform sensitivity check
- Using the intelligent tester, perform the sensitivity check (see page rs-241).
Standard value: 27 to 33 kg (59.52 To 72.75 Lb)
End
Front passenger side satellite sensor bus initialization incomplete
Description
When the center airbag sensor receives signals from the lateral deceleration
sensor, it determines
whether or not the srs should be activated.
Dtc b1648/82 is recorded when a ma ...
Seat position airbag sensor circuit malfunction
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
...
Other materials:
Front seats
Adjustment procedure
Manual seat
Seat position adjustment lever
Seatback angle adjustment
lever
Vertical height adjustment
lever (driver’s side only)
Power seat (driver’s side only)
Seat position adjustment switch
Seatback angle adjustment
switch
seat cushion (f ...
The rear cross traffic
alert function
The areas that vehicles can be detected in are outlined below.
The range of the detection area
extends to:
Approximately 11.5 Ft. (3.5 M)
from the side of the vehicle
The first 1.6 Ft. (0.5 M) from the
side of the vehicle is not in the
detection area
Approximately 9.8 Ft. (3 M) fr ...
Diagnostic trouble code chart
Hint:
If no abnormality is found when inspecting parts, check the
skid control ecu and check for poor contact at the ground
points.
If a dtc is displayed during the dtc check, check the
circuit for the dtc listed in the table below. For details of
each dtc, refer to the page indicated. ...
