If the steering control ECU detects that the VGRS system has a malfunction, warning information is transmitted to the combination meter via CAN communication.

The combination meter will turn the master warning light on based on this information.

Warning information is transmitted via the following route:

Center the steering wheel.

Turn the steering wheel from lock to lock at a speed of approximately 90°/sec. Check the steering wheel angles between the left and right.

Use the Data List to check if the record of overheat is functioning properly.

This problem may be caused by a malfunction in the vehicle stability control system or steering system.

Make sure that no DTC is output for the skid control ECU or steering control ECU before proceeding with the following procedures.

If a DTC is output for either of these ECUs, first troubleshoot it and then proceed to the troubleshooting below.

The steering control ECU receives signals from the skid control ECU, ECM and steering angle sensor via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system first.

When the VGRS system is normal, the steering actuator conducts current from the steering control ECU to the steering actuator solenoid to release the lock mechanism, enabling motor operation.

The steering actuator does not operate under any of the following conditions:

The steering control ECU monitors PIG (motor power source voltage) and detects a malfunction in the power supply relay (located inside the steering control ECU).

If the steering control ECU detects a malfunction, it will turn on the master warning light, store these DTCs, and stop VGRS operation.

The steering control ECU monitors the IG power supply voltage.

If the steering control ECU detects a malfunction, it will turn on the master warning light, store DTC C15C6/77, and stop VGRS operation.

The steering actuator drives the internal motor using the current output from the steering control ECU to change the relative angle between the tire angle and steering wheel angle.

The rotation angle sensor in the steering actuator detects the motor rotation angle and outputs this information to the steering control ECU.

If the steering control ECU detects a malfunction in the rotation angle sensor circuit, it will store DTC C15A3/63.