Toyota RAV4 (XA40) 2013-2018 Service Manual: How to proceed with troubleshooting
Hint:
- Use the following procedures to troubleshoot the occupant classification system.
- *: Use the intelligent tester.
- Vehicle brought to workshop
- Passenger airbag on/off indicator check
- Dtc check (present and past dtc)*
- Check for dtcs (see page rs-249 ).
Result 
- Dtc chart
- Repair or replacement
- Dtc clearance (present and past dtcs)*
- Clear the dtcs (see page rs-249).
- Dtc check (present and past dtcs)*
- Check for dtcs (see page rs-249 ).
Result 
- Problem symptoms simulation
- Check the passenger airbag on/off indicator condition (see page rs-246).
Result
- Confirmation test
End
System description
General
The front passenger occupant classification system
judges whether the front passenger seat is occupied
or not in accordance with the seat belt buckle
status; and whether the sea ...
Initialization
Zero point calibration
Notice:
Make sure that the front passenger seat is not
occupied before performing the operation.
Hint:
Perform the zero point calibration and sensitivity check if
any ...
Other materials:
Diagnostic trouble code chart
Hint:
If any dtcs are displayed during the dtc check, inspect the
circuit listed for these dtcs. For details of each dtc, refer to
the page indicated in the dtc chart.
Hint:
: Warning
light comes on
X: warning light turns off (normal reset) ...
Front occupant classification sensor lh circuit
malfunction
Description
The front occupant classification sensor lh circuit consists of the occupant
classification ecu and the
front occupant classification sensor lh.
Dtc b1780 is recorded when a malfunction is detected in the front occupant
classification sensor lh
circuit.
Wiring diagram
...
Diagnostic trouble code chart
Look for output diagnostic trouble codes (dtcs) (from the
dtc checks) in the appropriate section's diagnostic trouble
code chart. Use the chart to determine the trouble area and
the proper inspection procedure. A description of each of the
chart's columns are below.
Item
Description
...
