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

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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 either of the following conditions:
  1. The engine is off.
  2. The motor in the actuator is locked by the lock mechanism to prevent rotation. (Fail-safe function)
  3. 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 No.
DTC Detecting 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.
  1. Steering actuator
C15A9/66
The steering control ECU detects that the lock pin is not aligned with the lock holder correctly.
  1. Steering actuator
C15AA//66
The steering control ECU cannot operate because the actuator lock cannot be released.
  1. Steering actuator
C15AB/66
The steering control ECU detects that the lock pin cannot be inserted into the lock holder.
  1. Steering actuator

INSPECTION PROCEDURE

1.REPLACE STEERING ACTUATOR

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