Lexus LX - Page 181

DTC C15A3/63 Actuator Malfunction
DTC C15C5/69 Motor Revolution Angle Signal (Test Mode DTC)
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DESCRIPTION
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.
DTC Code DTC Detection Condition Trouble Area
C15A3/63
The steering control ECU detects a malfunction in the rotation
angle sensor circuit.
Harness or connector
Steering actuator
Steering control ECU
C15C5/69
A steering signal indicating a motor rotation angle of 36° or more
(to the left or right) is input after entering test mode.*
Harness or connector
Steering actuator
Steering control ECU
HINT:
*: A tire angle of 36° and a motor rotation angle of 36° correspond to the steering wheel angle. The amount of change in tire angle and motor rotation
angle is from when the mode is changed to test mode.
WIRING DIAGRAM
INSPECTION PROCEDURE
1.CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ACTUATOR)