Toyota RAV4 (XA40) 2013-2018 Service Manual: Different diameter tire malfunction
Description
The skid control ecu measures the speed of each wheel by receiving signals from the speed sensor.
These signals are used for recognizing that all 4 wheels are operating properly. Therefore, all wheel signals must be equal.
Inspection procedure
- Check tire size
- Check the diameter of all 4 tires.
Ok: diameter of all 4 tires are equal.
- Check speed sensor rotor
- Remove the drive shaft, and check around the speed sensor rotor.
Ok: no scratches or foreign matter on the sensor tip.
- Check speed sensor
- Check the speed sensor circuit (see page bc-64 or bc- 70).
- Check wire harness (skid control ecu - each speed sensor)
- Check the speed sensor circuit (see page bc-69 or bc- 70).
- Reconfirm dtc
- Clear the dtcs (see page bc-47).
- Drive the vehicle at more than 20 km/h (12 mph) for more than 60 seconds.
- Check if the same dtcs are detected.
Result 
Replace abs and traction actuator assembly
Steering angle sensor zero point malfunction
Description
The skid control ecu learns the steering sensor zero point every time the
ignition switch is turned on and
the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 sec ...
Downhill assist control operation switch (test mode dtc)
Description
The downhill assist control switch is connected to the skid control ecu in
the abs and traction
actuator.
Dtc c1379/74 can be detected when the downhill assist control switch se ...
Other materials:
Hood
Release the lock from the inside of the vehicle to open the hood
Pull the hood lock release lever.
The hood will pop up slightly.
Push the auxiliary catch lever to
the left and lift the hood.
Hold the hood open by inserting
the supporting rod into the slot.
Cautio ...
Speed sensor
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 battery
Loosen the nut and remove the b ...
Brake pedal load sensing switch
On-vehicle inspection
Inspect brake pedal load sensing switch
Hint:
Do not remove the brake pedal load sensing switch
from the brake pedal support.
When there is a malfunction in the brake pedal load
sensing switch, replace the brake pedal support.
Disconnect the brake pedal l ...
