Dtc C15A4/64 Motor Rotation Angle Malfunction

Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200
Variable Gear Ratio Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

REPLACE STEERING ACTUATOR ASSEMBLY

DTC C15A4/64 Motor Rotation Angle Malfunction

DTC C15A9/66 Lock Holder Deviation Detection

DTC C15AA/66 Lock Mechanism Release Incomplete

DTC C15AB/66 Lock Mechanism Insertion


DESCRIPTION

When the VGRS system is normal, the steering actuator assembly conducts current from the VGRS ECU (steering control ECU) to the steering actuator solenoid to release the lock mechanism, enabling motor operation.
The steering actuator assembly does not operate under any of the following conditions:
  1. The engine switch 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 VGRS ECU (steering control ECU) detects a malfunction in the steering actuator lock mechanism or a motor rotation angle error, it stores these DTCs.

DTC No.
DTC Detection Condition
Trouble Area
C15A4/64
After starting the engine, the "Actuator Target Angle" and "Actuator Angle" have a difference of 0.5 degrees or more for 1 second or more.
Steering actuator assembly
C15A9/66
After the engine switch is turned off, the lock pin is inserted with the steering wheel near the neutral position (within 90 degrees of 0), the "Actuator Angle" and "Deep Groove Electrical Angle Position" are at 40 degrees or more.
Steering actuator assembly
C15AA/66
After starting the engine, the "Motor q Axis Target Voltage" is 1.8 V or higher and 15 seconds or more elapse, or the "Motor q Axis Target Voltage" is 0.6 V or higher and 180 seconds or more elapse.
Steering actuator assembly
C15AB/66
After the engine switch is turned on (IG), when the motor is operating to confirm the lock pin insertion, the "Motor q Axis Target Voltage" is below 2 V.
Steering actuator assembly

INSPECTION PROCEDURE

NOTICE:
When replacing the steering actuator assembly, perform actuator angle neutral point calibration and initialization after replacement (Click here).
1.REPLACE STEERING ACTUATOR ASSEMBLY

  1. Replace the steering actuator assembly (Click here).


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