Toyota RAV4 (XA40) 2013-2018 Service Manual: Srs warning light does not come 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 from off to on, and then goes off automatically.
If there is a malfunction in the srs, the srs warning light comes on to inform the driver of a problem.
When terminals tc and cg of the dlc3 are connected, the dtc is displayed by blinking the srs warning light.
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 battery voltage drops, the voltage-increase circuit (dc-dc converter) functions to increase the voltage of the srs to normal voltage.
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.
The signal to illuminate the srs warning light is transmitted from the center airbag sensor to the combination meter through the multiplex communication system.
Wiring diagram
Inspection procedure
- Check battery
- Measure the voltage of the battery.
Standard voltage: 11 to 14 v
- Check connectors
- Turn the ignition switch off.
- Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
- Check that the e19 connectors are properly connected to the center airbag sensor and the combination meter.
Ok: the connectors are properly connected.
- Check wire harness (source voltage of combination meter)
- Turn the ignition switch off.
- Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
- Disconnect the connector from the combination meter.
- Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
- Turn the ignition switch on.
- Measure the voltage of the wire harness side connectors.
Standard voltage 
- Turn the ignition switch off.
- 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 e19 connector to the combination meter.
- Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
- Turn the ignition switch on.
- Check the srs warning light condition.
Ok: the srs warning light does not come on.
Replace center airbag sensor assembly
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 ...
Tc and cg terminal circuit
Description
Dtc output mode is set by connecting terminals tc and cg of the dlc3.
The dtcs are displayed by blinking the srs warning light.
Hint:
Make sure that dtc b1281 has not been output. ...
Other materials:
Adjusting the mirrors
Make sure that you can see backward clearly by adjusting the inside
and outside rear view mirrors properly.
Caution
Observe the following precautions.
Failure to do so may result in death or serious injury.
Do not adjust the position of the driver’s seat while driving.
Doing so could ...
Cleaning and protecting the vehicle exterior
Perform the following to
protect the vehicle and
maintain it in prime condition:
Cleaning instructions
Working from top to bottom,
liberally apply water to the
vehicle body, wheel wells and
underside of the vehicle to
remove any dirt and dust.
Wash the vehicle body using
a sponge or soft clo ...
Short in front driver side - side squib circuit
Description
The driver side - side squib circuit consists of the center airbag sensor and
the front seat side airbag lh.
This circuit instructs the srs to deploy when the deployment conditions are met.
These dtcs are recorded when a malfunction is detected in the driver side - side
sq ...
