POWER STEERING SYSTEM, Diagnostic DTC:C1511, C1512, C1513, C1514, C1517

DTC Code DTC Name
C1511 Torque Sensor Circuit Malfunction
C1512 Torque Sensor Circuit Malfunction
C1513 Torque Sensor Circuit Malfunction
C1514 Torque Sensor Power Supply Abnormal
C1517 Torque Hold Abnormal

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
C1511 A torque sensor (TRQ1) signal error or stop.

  • Steering column assembly (torque sensor)

  • Power steering ECU assembly
C1512 A torque sensor (TRQ2) signal error or stop.
C1513 The deviation between torque sensor TRQ1 and TRQ2 exceeds a specified value.
C1514 A torque sensor power supply voltage error.
C1517 Temporary control due to a malfunction related to the torque sensor continues for long time.

WIRING DIAGRAM

A00OLLNE07

INSPECTION PROCEDURE

Note

If the power steering ECU assembly or steering column assembly is replaced, perform rotation angle sensor initialization and torque sensor zero point calibration Click here.

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (TORQUE SENSOR - POWER STEERING ECU)


    1. A00OKY1E03
      Text in Illustration
      *1

      Component with harness connected

      (Power Steering ECU)

      Check the connection condition of the z12 torque sensor connector.

      OK
      Torque sensor connector is securely connected to the power steering ECU.

    NG

    CONNECT CONNECTOR SECURELY

    OK

  2. CHECK POWER STEERING ECU (TRQV VOLTAGE)


    1. Turn the ignition switch off.

    2. Turn the ignition switch to ON.

    3. A00OKY1E01
      Text in Illustration
      *1

      Component with harness connected

      (Power Steering ECU)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      z12-6 (TRQV) - z12-8 (TRQG) Ignition switch ON 4.5 to 5.5 V

      Tech Tips

      When the value is within the specified range, record the value.

      Result
      Result Proceed to
      OK A
      NG for LHD B
      for RHD C

    B

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    C

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    A

  3. CHECK POWER STEERING ECU (TRQ1, TRQ2 VOLTAGE)


    1. A00OKY1E02
      Text in Illustration
      *1

      Component with harness connected

      (Power Steering ECU)

      Start the engine.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      z12-5 (TRQ1) - z12-8 (TRQG) Engine running, steering wheel not turned (without load) 2.3 to 2.7 V
      Engine running, steering wheel turned to right with vehicle stopped 2.5 to 3.8 V
      Engine running, steering wheel turned to left with vehicle stopped 1.2 to 2.5 V
      z12-7 (TRQ2) - z12-8 (TRQG) Engine running, steering wheel not turned (without load) 2.3 to 2.7 V
      Engine running, steering wheel turned to right with vehicle stopped 1.2 to 2.5 V
      Engine running, steering wheel turned to left with vehicle stopped 2.5 to 3.8 V

    3. Calculate the difference between the value recorded when measuring the voltage at terminal TRQV in the previous step, and the sum of the output of torque sensor 1 and torque sensor 2.

      OK
      0.3 V or less (Absolute value)
      Result
      Result Proceed to
      OK for LHD A
      for RHD B
      NG for Manual Tilt and Manual Telescopic Steering Column C
      for Power Tilt and Power Telescopic Steering Column D

    B

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    C

    REPLACE STEERING COLUMN ASSEMBLY Click here

    D

    REPLACE STEERING COLUMN ASSEMBLY Click here

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here