Toyota RAV4 (XA40) 2013-2018 Service Manual: Occupant classification ecu malfunction
![Toyota RAV4. Occupant classification ecu malfunction](images/books/256/68/4.htm86.jpg)
Description
Dtc b1795 is recorded when a malfunction is detected in the occupant
classification ecu.
Troubleshoot dtc b1771 first when dtc b1771 and b1795 are output simultaneously.
![Toyota RAV4. Occupant classification ecu malfunction](images/books/256/68/4.htm87.jpg)
Wiring diagram
![Toyota RAV4. Occupant classification ecu malfunction](images/books/256/68/4.htm88.jpg)
Inspection procedure
- Check for dtc
- Turn the ignition switch on, and wait for at least 10
seconds.
- Check the dtcs (see page rs-249).
Result ![](images/books/256/68/4.htm89.jpg)
Hint:
Dtcs other than dtc b1771 and b1795 may be output
at this time, but they are not related to this check.
![](images/books/256/68/4.htm208.gif)
- Check fuse (ecu-b)
- Check the ecu-b fuse from the instrument panel
junction block.
- Measure the resistance of the fuse.
Standard resistance:
below 1 ![](images/books/256/68/4.htm209.gif)
![](images/books/256/68/4.htm211.gif)
- Check wire harness (source voltage)
![Toyota RAV4. Check wire harness (source voltage)](images/books/256/68/4.htm94.jpg)
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery
terminal, and wait for at least 90 seconds.
- Disconnect the no. 2 Floor wire connector from the
occupant classification ecu.
- Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
- Measure the voltage of the wire harness side connector.
Standard voltage ![](images/books/256/68/4.htm95.jpg)
- Turn the ignition switch off.
- Measure the resistance of the wire harness side
connector
standard resistance ![](images/books/256/68/4.htm96.jpg)
![](images/books/256/68/4.htm213.gif)
- 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).
Hint:
Perform the inspection using parts from a normal vehicle
if possible.
- Perform zero point calibration
- Connect the cable to the negative (-) battery terminal,
and wait for at least 2 seconds.
- Connect the intelligent tester to the dlc3.
- Turn the ignition switch on.
- Using the intelligent tester, perform the zero point
calibration (see page rs-241).
Ok:
completed is displayed.
![](images/books/256/68/4.htm215.gif)
- 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)
![](images/books/256/68/4.htm216.gif)
End
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 ...
Description
During sleep mode, the occupant classification ecu reads the condition of
each sensor while the ignition
switch is off.
In this mode, if the occupant classification ecu detects ...
Other materials:
Cargo and luggage
Take notice of the following
information about storage
precautions, cargo capacity
and load.
WARNING
â– Things that must not be carried
in the luggage compartment
The following things may cause a
fire if loaded in the luggage compartment:
Receptacles containing gasoline
Aerosol cans
â– Storage p ...
Installation
Hint:
Use the same procedures for the rh side and lh side.
The procedures listed below are for the lh side.
Install front pillar cover sub-assembly upper lh
Attach the 3 clips to install the pillar cover.
...
How to proceed with troubleshooting (2005/11-2006/01)
Hint:
Use these procedures to troubleshoot the air conditioning
system.
*: Use the intelligent tester.
Vehicle brought to workshop
Customer problem analysis and symptom check
Inspect battery voltage
Standard voltage:
11 to 14 v
If the voltage is below 11 v, rechar ...