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:
Terminals of ecu (2006/01- )
Check air conditioning amplifier
Measure the voltage and resistance of the
connectors.
Hint:
Check from the rear of the connector while it is
connected to the air conditioning amplifier.
Hint:
*: For 2gr-fe
Using an oscilloscope, check waveform 1.
Can communi ...
Evaporative emission control system incorrect purge flow
Dtc summary
Description
The description can be found in the evap (evaporative emission) system (see
page es-335).
Inspection procedure
Refer to the evap system (see page es-340).
Monitor description
The two monitors, key-off and purge flow, are used to detect malfunctions
relating ...
Valve body assembly
Components
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
Drain automati ...
