ELECTRONIC POWER STEERING SYSTEM > FAIL-SAFE CHART

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If a problem occurs in the electric power steering system, the P/S warning light will come on in the combination meter and steering power assistance will be stopped, fixed at a particular point, or decreased simultaneously to protect the system.

DTC No.
Malfunction
Fail-safe
C1511
Torque Sensor Abnormal
Power assistance stops.
C1512
C1513
C1521
Motor Abnormal
C1522
C1523
C1524
C1528
Motor Rotation Angle Sensor Malfunction
C1531
ECU Malfunction
C1532
C1546
HV System Malfunction
C1555
Motor Relay Welding Failure
C1568
DC-DC Converter Malfunction
C1533
ECU Malfunction
System overheat prevention control continues without using the substrate temperature sensor.
C1534
ECU Abnormal
Power assistance continues with the amount of power assistance fixed for a speed of 100 km/h (62 mph) and with torque sensor zero point and rotation angle sensor calibration value set to the default values.
C1541
Vehicle Speed System Abnormal
Amount of power assistance is fixed for a speed of 100 km/h (62 mph).
U0121
Lost Communication With Anti-lock Brake System (ABS) Control Module

HINT:
The amount of power assistance may be decreased to prevent the motor and ECUs from overheating if the steering wheel is continuously turned when the vehicle is either stopped or driven at a low speed, or if the steering wheel is kept at either full lock position for a long time. In that case, the amount of power assistance will return to normal if the steering wheel is not turned for approximately 10 minutes in the READY-on state.