DTC C15A4/64: Actuator Malfunction; DTC C15A9/66: Lock Holder Deviation Detection; DTC C15AA/66: Lock Mechanism Release Incomplete; DTC C15AB/66: Lock Mechanism Insertion Malfunction [08/2014 - ]: Description
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 engine switch is off.
- The motor in the actuator is locked by the lock mechanism to prevent rotation (fail-safe function).
- The system is being protected from overheating (fail-safe function).
If the steering control ECU detects a malfunction in the steering actuator lock mechanism or a motor rotation angle error, it will store these DTCs.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C15A4/64 | The steering control ECU detects that the difference between the actuator target angle and the actuator position is approximately 30° or more for 1 second. | Steering actuator |
| C15A9/66 | The steering control ECU detects that the lock pin is not aligned with the lock holder correctly. | Steering actuator |
| C15AA/66 | The steering control ECU cannot operate because the actuator lock cannot be released. | Steering actuator |
| C15AB/66 | The steering control ECU detects that the lock pin cannot be inserted into the lock holder. | Steering actuator |