Toyota RAV4 Service Manual: Short in front passenger side pretensioner squib circuit

Description
The front passenger side front pretensioner squib circuit consists of the
center airbag sensor and the front
seat outer belt rh.
This circuit instructs the srs to deploy when the deployment conditions are met.
These dtcs are recorded when a malfunction is detected in the front passenger
side front pretensioner
squib circuit.

Wiring diagram

Inspection procedure
Hint:
- Perform the simulation method by selecting the "check mode" (signal
check) with the intelligent
tester (see page rs-52).
- After selecting the "check mode" (signal check), perform the simulation
method by wiggling each
connector of the airbag system or driving the vehicle on a city or rough
road (see page rs-52).
- Check front seat outer belt assembly rh (front passenger side front
pretensioner squib)

- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery
terminal, and wait for at least 90 seconds.
- Disconnect the connectors from the front seat outer belt
rh.
- Connect the white wire side of sst to connector c.
Caution:
Never connect a tester to the front seat outer belt rh
(front passenger side front pretensioner squib) for
measurement, as this may lead to a serious injury
due to airbag deployment.
Notice:
- Do not forcibly insert sst into the terminals of the
connector when connecting.
- Insert sst straight into the terminals of the
connector.
Sst 09843-18060
- 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 b1905, b1906, b1907, b1908 or 74 is not
output.
Hint:
Dtcs other than dtc b1905, b1906, b1907, b1908 or
74 may be output at this time, but they are not related to
this check.


- Check con3
- Turn the ignition switch off.
- Disconnect the cable from the negative (-) battery
terminal, and wait for at least 90 seconds.
- Disconnect sst from connector c.
- Check that the floor wire connector (on the front seat
outer belt rh side) is not damaged.
Ok:
lock button is not disengaged, or the claw of the
lock is not deformed or damaged.

- Check floor wire (front passenger side front pretensioner squib
circuit)

- Disconnect the connectors from the center airbag
sensor.
- Connect the cable to the negative (-) battery terminal,
and wait for at least 2 seconds.
- Measure the voltage of the wire harness side connector.
Standard voltage
- 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 
- Release the activation prevention mechanism built into
connector b (see page rs-37).
- Measure the resistance of the wire harness side
connector.
Standard resistance 

Replace center airbag sensor assembly
Description
The driver side front pretensioner squib circuit consists of the center
airbag sensor and the front seat
outer belt lh.
This circuit instructs the srs to deploy when the deploym ...
Description
The srs is equipped with a voltage-increase circuit (dc-dc converter) in the
center airbag sensor in
case the source voltage drops.
When the source voltage drops, the voltage-increa ...
Other materials:
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 ...
Removal
Disconnect cable from negative battery
terminal
Caution:
Wait at least 90 seconds after disconnecting the
cable from the negative (-) battery terminal to
prevent airbag and seat belt pretensioner activation.
Remove no. 1 Engine under cover
Remove front fender apron rh
Remove radia ...
Status information
General information
The status field can be found in the upper area of
the Control Display. Status information is displayed
in the form of symbols.
Radio symbols
Symbol /Meaning
HD Radio station is being
received.
- Satellite radio is switched on.
Telephone symbols
Symbol /Meaning
- Incoming or out ...