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:
Bluetooth®
When using the bluetooth® audio system
In the following conditions, the system may not function.
If the portable audio player is turned off
If the portable audio player is not connected
If the portable audio player’s battery is low
There may be a delay if a cellular phone connection i ...
Check for intermittent problems
Hint:
Inspect the vehicle's ecm using check mode. Intermittent
problems are easier to detect with the intelligent tester when
the ecm is in check mode. In check mode, the ecm uses 1
trip detection logic, which is more sensitive to malfunctions
than normal mode (default), which uses 2 trip detec ...
Fuel pump shut off
system
To minimize the risk of fuel leakage when the engine stalls or
when an airbag inflates upon collision, the fuel pump shut off
system stops the supply of fuel to the engine.
Follow the procedure below to restart the engine after the system is
activated.
Vehicles without a smart key system
Tu ...
