Toyota RAV4 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

1. Check tire size

1. Check the diameter of all 4 tires.

Ok: diameter of all 4 tires are equal.

2. Check speed sensor rotor

1. Remove the drive shaft, and check around the speed sensor rotor.

Ok: no scratches or foreign matter on the sensor tip.

3. Check speed sensor

1. Check the speed sensor circuit (see page bc-64 or bc- 70).

4. Check wire harness (skid control ecu - each speed sensor)

1. Check the speed sensor circuit (see page bc-69 or bc- 70).

5. Reconfirm dtc

1. Clear the dtcs (see page bc-47).
2. Drive the vehicle at more than 20 km/h (12 mph) for more than 60 seconds.
3. Check if the same dtcs are detected.

Result

Replace abs and traction actuator assembly