DTC    C15A3/63    Actuator Malfunction

DTC    C15C5/75    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 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 No.
DTC Detecting Condition
Trouble Area
C15A3/63
The steering control ECU detects a malfunction in the rotation angle sensor circuit.
  1. Wire harness and connector
  2. Steering actuator
  3. Steering control ECU

WIRING DIAGRAM


C109543E03


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS


    C110891E05

  1. Turn the engine switch off.

  1. Disconnect the connectors from the steering control ECU and the steering actuator.

  1. Measure the resistance according to the value(s) in the table below.

    Resistance:
    Tester connection
    		Specified condition
    L70-4 (S1) - L26-5 (S1+)
    		Below 1 Ω
    L70-6 (RV) - L26-1 (RV+)
    		Below 1 Ω
    L70-14 (S2) - L26-9 (S2+)
    		Below 1 Ω
    L70-15 (RG) - L26-10 (RG+)
    		Below 1 Ω
    L70-4 (S1) - L70-6 (RV)
    		10 kΩ or higher
    L70-4 (S1) - L70-14 (S2)
    		10 kΩ or higher
    L70-4 (S1) - L70-15 (RG)
    		10 kΩ or higher
    L70-6 (RV) - L70-14 (S2)
    		10 kΩ or higher
    L70-6 (RV) - L70-15 (RG)
    		10 kΩ or higher
    L70-14 (S2) - L70-15 (RG)
    		10 kΩ or higher
    L70-4 (S1) - Body ground
    		10 kΩ or higher
    L70-6 (RV) - Body ground
    		10 kΩ or higher
    L70-14 (S2) - Body ground
    		10 kΩ or higher
    L70-15 (RG) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE WIRE HARNESS
OK


2.CHECK STEERING ACTUATOR


    C107437E03

  1. Connect the connector to the steering actuator.

  1. Measure the resistance according to the value(s) in the table below.

    Resistance:
    Tester connection
    		Specified condition
    L70-4 (S1) - L70-6 (RV)
    		Below 100 Ω
    L70-4 (S1) - L70-14 (S2)
    		Below 100 Ω
    L70-4 (S1) - L70-15 (RG)
    		Below 100 Ω
    L70-6 (RV) - L70-14 (S2)
    		Below 100 Ω
    L70-6 (RV) - L70-15 (RG)
    		Below 100 Ω
    L70-14 (S2) - L70-15 (RG)
    		Below 100 Ω
    L70-4 (S1) - Body ground
    		10 kΩ or higher
    L70-6 (RV) - Body ground
    		10 kΩ or higher
    L70-14 (S2) - Body ground
    		10 kΩ or higher
    L70-15 (RG) - Body ground
    		10 kΩ or higher



NG
REPLACE STEERING ACTUATOR
OK

REPLACE STEERING CONTROL ECU