Dtc C15A3/63 Actuator Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ACTUATOR)

CHECK STEERING ACTUATOR

DTC C15A3/63 Actuator Malfunction

DTC C15C5/69 Motor Revolution Angle Signal (Test Mode DTC)


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.
  1. Harness or connector
  2. Steering actuator
  3. 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.*
  1. Harness or connector
  2. Steering actuator
  3. 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


Land Cruiser. Urj200, 202 Grj200 Vdj200.Variable Gear Ratio Steering.Variable Gear Ratio Steering System. Dtc C15A3/63 Actuator Malfunction


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ACTUATOR)

Land Cruiser. Urj200, 202 Grj200 Vdj200.Variable Gear Ratio Steering.Variable Gear Ratio Steering System. Dtc C15A3/63 Actuator Malfunction

  1. Disconnect the E79 steering control ECU connector.

  1. Disconnect the E80 steering actuator connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E79-4 (S1) - E80-2 (S1+)
    		Always
    		Below 1 Ω
    E79-6 (RV) - E80-1 (RV+)
    E79-14 (S2) - E80-9 (S2+)
    E79-15 (RG) - E80-10 (RG+)
    E79-4 (S1) - E79-6 (RV)
    		Always
    		10 kΩ or higher
    E79-4 (S1) - E79-14 (S2)
    E79-4 (S1) - E79-15 (RG)
    E79-6 (RV) - E79-14 (S2)
    E79-6 (RV) - E79-15 (RG)
    E79-14 (S2) - E79-15 (RG)
    E79-4 (S1) - Body ground
    E79-6 (RV) - Body ground
    E79-14 (S2) - Body ground
    E79-15 (RG) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK STEERING ACTUATOR


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Variable Gear Ratio Steering.Variable Gear Ratio Steering System. Dtc C15A3/63 Actuator Malfunction

  1. Disconnect the E79 steering control ECU connector.

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

    HINT:
    The resistance must be measured with the steering actuator connector connected.
    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E79-4 (S1) - E79-6 (RV)
    		Always
    		Below 200 Ω
    E79-4 (S1) - E79-14 (S2)
    E79-4 (S1) - E79-15 (RG)
    E79-6 (RV) - E79-14 (S2)
    E79-6 (RV) - E79-15 (RG)
    E79-14 (S2) - E79-15 (RG)
    E79-4 (S1) - Body ground
    		Always
    		10 kΩ or higher
    E79-6 (RV) - Body ground
    E79-14 (S2) - Body ground
    E79-15 (RG) - Body ground
    Result
    Result
    Result    		Proceed to
    NG
    		A
    OK (for LHD)
    		B
    OK (for RHD)
    		C


B
REPLACE STEERING CONTROL ECU (Click here)

C
REPLACE STEERING CONTROL ECU (Click here)
A

REPLACE STEERING ACTUATOR ASSEMBLY (Click here)