Dtc C1511 Torque Sensor Circuit Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - TORQUE SENSOR)

INSPECT POWER STEERING GEAR ASSEMBLY (TORQUE SENSOR)

REPLACE POWER STEERING ECU ASSEMBLY

INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT

RECONFIRM DTC

DTC C1511 Torque Sensor Circuit Malfunction

DTC C1512 Torque Sensor Circuit Malfunction

DTC C1513 Torque Sensor Circuit Malfunction


DESCRIPTION

The torque sensor converts rotation torque input to the steering wheel into an electrical signal and sends it to the ECU. Based on this signal, the ECU detects steering effort.

DTC No.
Detection Item
Trouble Area
C1511
Torque sensor (TRQ1) signal error or stop
  1. Wire harness
  2. Torque sensor (built into power steering gear assembly)
  3. Power steering ECU assembly
C1512
Torque sensor (TRQ2) signal error or stop
  1. Wire harness
  2. Torque sensor (built into power steering gear assembly)
  3. Power steering ECU assembly
C1513
Deviation between torque sensors
  1. Wire harness
  2. Torque sensor (built into power steering gear assembly)
  3. Power steering ECU assembly

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Power Steering.Power Steering System. Dtc C1511 Torque Sensor Circuit Malfunction


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - TORQUE SENSOR)


    Lexus Is250, Is220D. Gse20 Ale20.Power Steering.Power Steering System. Dtc C1511 Torque Sensor Circuit Malfunction

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

  1. Disconnect the C1 connector from the torque sensor.

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

    Standard resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    C1-1 (INCS) - C4-10 (INCS)
    		Always
    		Below 1 Ω
    C1-2 (INSN) - C4-9 (INSN)
    		Always
    		Below 1 Ω
    C1-4 (TRQV) - C4-4 (TRQV)
    		Always
    		Below 1 Ω
    C1-5 (OUCS) - C4-12 (OUCS)
    		Always
    		Below 1 Ω
    C1-6 (OUSN) - C4-11 (OUSN)
    		Always
    		Below 1 Ω
    C1-7 (TQG2) - C4-13 (TQG2)
    		Always
    		Below 1 Ω
    C1-8 (TQG1) - C4-6 (TQG1)
    		Always
    		Below 1 Ω
    C1-1 (INCS) - Body ground
    		Always
    		10 kΩ or higher
    C1-2 (INSN) - Body ground
    		Always
    		10 kΩ or higher
    C1-4 (TRQV) - Body ground
    		Always
    		10 kΩ or higher
    C1-5 (OUCS) - Body ground
    		Always
    		10 kΩ or higher
    C1-6 (OUSN) - Body ground
    		Always
    		10 kΩ or higher
    C1-7 (TQG2) - Body ground
    		Always
    		10 kΩ or higher
    C1-8 (TQG1) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT POWER STEERING GEAR ASSEMBLY (TORQUE SENSOR)


    Lexus Is250, Is220D. Gse20 Ale20.Power Steering.Power Steering System. Dtc C1511 Torque Sensor Circuit Malfunction

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

    Standard resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    C1-1 (INCS) - C1-7 (TQG2)
    		Always
    		90 to 170 Ω
    C1-2 (INSN) - C1-7 (TQG2)
    		Always
    		300 to 430 Ω
    C1-4 (TRQV) - C1-8 (TQG1)
    		Always
    		4 to 14 Ω
    C1-5 (OUCS) - C1-7 (TQG2)
    		Always
    		90 to 170 Ω
    C1-6 (OUSN) - C1-7 (TQG2)
    		Always
    		300 to 430 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


3.REPLACE POWER STEERING ECU ASSEMBLY

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


NEXT


4.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


5.RECONFIRM DTC

  1. Check for DTCs (Click here).

    Result:
    DTC Condition
    		Proceed to
    DTC is not output
    		A
    DTC C1511, C1512, or C1513 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