Dtc C1528 Motor Rotation Angle Sensor Malfunction

Steering. Lexus Is250, Is220D. Gse20 Ale20
Power Steering. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK POWER STEERING EARTH WIRE (POWER STEERING GEAR ASSEMBLY - BODY GROUND)

CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - MOTOR ROTATION ANGLE SENSOR)

INSPECT POWER STEERING GEAR ASSEMBLY (MOTOR ROTATION ANGLE SENSOR)

REPLACE POWER STEERING ECU ASSEMBLY

INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT

RECONFIRM DTC

DTC C1528 Motor Rotation Angle Sensor Malfunction


DESCRIPTION

The motor rotation angle sensor detects the motor rotation angle and sends this information to the power steering ECU assembly.

DTC No.
DTC Detection Item
Trouble Area
C1528
Motor rotation angle sensor malfunction
(e.g. An open, short to ground, or short to B+ in the rotation angle sensor circuit)
  1. Motor rotation angle sensor (built into power steering gear assembly)
  2. Wire harness
  3. Power steering earth wire
  4. Power steering ECU assembly

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Power Steering.Power Steering System. Dtc C1528 Motor Rotation Angle Sensor Malfunction


INSPECTION PROCEDURE

1.CHECK POWER STEERING EARTH WIRE (POWER STEERING GEAR ASSEMBLY - BODY GROUND)

  1. Check the installation condition of the power steering earth wire connected to the power steering gear assembly.

    OK:
    The power steering earth wire is securely installed to the power steering gear assembly and body ground.


NG
REINSTALL POWER STEERING EARTH WIRE
OK


2.CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - MOTOR ROTATION ANGLE SENSOR)


    Lexus Is250, Is220D. Gse20 Ale20.Power Steering.Power Steering System. Dtc C1528 Motor Rotation Angle Sensor Malfunction

  1. Disconnect the C2 connector from the power steering gear assembly.

  1. Disconnect the C4 connector from the power steering ECU.

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

    Standard resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    C2-1 (RZSN) - C4-7 (RZSN)
    		Always
    		Below 1 Ω
    C2-2 (RZG) - C4-1 (RZG)
    		Always
    		Below 1 Ω
    C2-3 (RZV) - C4-3 (RZV)
    		Always
    		Below 1 Ω
    C2-4 (RZCS) - C4-8 (RZCS)
    		Always
    		Below 1 Ω
    C2-1 (RZSN) - Body ground
    		Always
    		10 kΩ or higher
    C2-2 (RZG) - Body ground
    		Always
    		10 kΩ or higher
    C2-3 (RZV) - Body ground
    		Always
    		10 kΩ or higher
    C2-4 (RZCS) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT POWER STEERING GEAR ASSEMBLY (MOTOR ROTATION ANGLE SENSOR)


    Lexus Is250, Is220D. Gse20 Ale20.Power Steering.Power Steering System. Dtc C1528 Motor Rotation Angle Sensor Malfunction

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

    Standard resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    C2-1 (RZSN) - C2-2 (RZG)
    		Always
    		50 to 140 Ω
    C2-3 (RZV) - C2-2 (RZG)
    		Always
    		50 to 140 Ω
    C2-4 (RZCS) - C2-2 (RZG)
    		Always
    		15 to 45 Ω
    NOTICE:
    If replacing the power steering gear assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point (Click here).


NG
REPLACE POWER STEERING GEAR ASSEMBLY
OK


4.REPLACE POWER STEERING ECU ASSEMBLY

  1. Replace the power steering ECU assembly (Click here).


NEXT


5.INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT

  1. Initialize the rotation angle sensor value and calibrate the torque sensor zero point (Click here).


NEXT


6.RECONFIRM DTC

  1. Check for DTCs (Click here).

    Result:
    DTC Condition
    		Proceed to
    DTC is not output
    		A
    DTC C1528 is output
    		B
    NOTICE:
    If replacing the power steering gear assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point (Click here).


B
REPLACE POWER STEERING GEAR ASSEMBLY
A

END