Toyota RAV4 (XA40) 2013-2018 Service Manual: Front passenger side seat belt warning light malfunction
Description
When the ignition switch is on, the center airbag sensor transmits front seat inner belt status signals to the combination meter through the can bus line. If the front passenger seat belt is not fastened, the heater control panel (automatic a/c) or clock (manual a/c) blinks the front passenger seat belt warning light. If the seat belt is fastened, the warning light goes off.
Notice:
The seat belt warning system uses the can bus line. Before troubleshooting the seat belt warning system, perform "communication function check" by following "how to proceed with troubleshooting" to confirm that the communication systems are normal.
Wiring diagram
Inspection procedure
- Perform active test by intelligent tester
- Select the active test, use the intelligent tester to generate a control command, and then check that the seat belt warning light operates.
Center airbag sensor:
Ok: passenger side seat belt warning light operates normally.
- Check a/c type
- Check system.
- Check heater control panel (power source circuit)
- Disconnect the e23 panel connector.
- Measure the voltage and resistance of the wire harness side connector.
Standard voltage 
Standard resistance 
- Check wire harness (heater control panel - combination meter assembly)
- Disconnect the e23 panel connector.
- Disconnect the e19 meter connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance 
- Inspect heater control panel
- Remove the heater control panel.
- Apply battery voltage and check that the front passenger side seat belt warning light illuminates.
Ok 
Hint:
When the battery's negative (-) lead is applied to terminal 4 and the positive (+) lead is applied to terminal 7, the seat belt warning light does not illuminate.
- Check clock sub-assembly (power source circuit)
- Disconnect the e22 clock connector.
- Measure the voltage and resistance of the wire harness side connector.
Standard voltage
Standard resistance
- Check wire harness (clock - combination meter)
- Disconnect the e22 clock connector.
- Disconnect the e19 meter connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance 
- Inspect clock sub-assembly
- Remove the clock.
- Apply battery voltage and check that the front passenger side seat belt warning light illuminates.
Ok 
Hint:
When the battery's negative (-) lead is applied to terminal 3 and the positive (+) lead is applied to terminal 5, the seat belt warning light does not illuminate.
Replace combination meter assembly
Driver side seat belt warning light does not operate
Description
When the ignition switch is on, the center airbag sensor transmits front seat
inner belt status signals to
the combination meter through the can bus line. If the driver seat belt is no ...
Front seat inner belt assembly
Components
...
Other materials:
A/f sensor circuit slow response (bank 1 sensor 1)
Hint:
Sensor 1 refers to the sensor mounted in front of the three-way catalytic
converter (twc) and located
near the engine assembly.
Description
Refer to dtc p2195 (see page es-292).
Monitor description
After the engine is warmed up, the ecm performs air-fuel ratio feedback
contro ...
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 front seat track bracket outer
cover lh (see page se-11)
Remove fr ...
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 ...
