Toyota RAV4 (XA40) 2013-2018 Service Manual: Source voltage drop
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-increase circuit (dc-dc converter) functions to increase the voltage of the srs to a normal working level.
A malfunction in this circuit is displayed differently from other codes, in the fact that no dtcs are recorded. With a normal system code present, the source voltage drop is indicated when the srs warning light comes on.
A malfunction in this circuit is not recorded in the center airbag sensor .
The srs warning light automatically goes off when the source voltage returns to normal.
Wiring diagram
Inspection procedure
- Check wire harness (center airbag sensor assembly - battery)
- Turn the ignition switch off.
- Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
- Disconnect the e45 connector from the center airbag sensor .
- Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
- Measure the voltage of the wire harness side connectors.
Standard voltage 
- Check wire harness (center airbag sensor assembly - body ground)
- Measure the resistance of the wire harness side connectors.
Standard resistance 
- Check wire harness (center airbag sensor assembly - body ground)
- Measure the resistance of the wire harness side connectors.
Standard resistance 
- Check srs warning light
- Turn the ignition switch off.
- Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
- Connect the e45 center airbag sensor connector.
- Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
- Turn the ignition switch on, and wait for at least 6 seconds.
- Operate all components of the electrical system (defogger, wiper, headlight, heater, blower, etc.) And check that the srs warning light does not come on.
Ok: srs warning light does not come on.
End
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 whe ...
Srs warning light remains on
Description
The srs warning light is located on the combination meter.
When the srs is normal, the srs warning light comes on for approximately 6
seconds after the ignition
switch is turned fro ...
Other materials:
Lost communication with front passenger side - side airbag sensor assembly
Description
The side airbag sensor rh consists of parts including the diagnostic circuit
and the lateral deceleration
sensor.
When the center airbag sensor receives signals from the lateral deceleration
sensor, it determines
whether or not the srs should be activated.
Dtc b1627/82 i ...
Removal and installation of fuel control
parts
Place for removing and installing fuel
system parts
Work in a location with good air ventilation that
does not have welders, grinders, drills, electric
motors, stoves, or any other ignition sources.
Never work in a pit or near a pit as vaporized
fuel will collect in those places.
...
Curtain shield airbag assembly
Components
On-vehicle inspection
Check curtain shield airbag assembly (vehicle not involved in
collision)
Perform a diagnostic system check (see page rs-
49).
With the curtain shield airbag assembly installed on
the vehicle, perform a visual check. If any of the
defects ...
