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 assembly. 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

A004JSDE02
*1 Torque Sensor
*2 Steering Column Assembly
*3 Power Steering ECU Assembly

CAUTION / NOTICE / HINT

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 ASSEMBLY)


    1. A004KDDE02
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      Check the connection condition of the z2 torque sensor connector.

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

    NG

    CONNECT CONNECTOR SECURELY

    OK

  2. CHECK POWER STEERING ECU ASSEMBLY (TRQV VOLTAGE)


    1. Turn the ignition switch off.

    2. Turn the ignition switch to ON.

    3. A004HI2E02
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      z2-9 (TRQV) - z2-11 (TRQG) Ignition switch ON 4.5 to 5.5 V

      Tech Tips

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


    NG

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    OK

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


    1. A004IIJE02
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      Start the engine.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      z2-8 (TRQ1) - z2-11 (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 2.3 to 3.8 V
      Engine running, steering wheel turned to left with vehicle stopped 1.2 to 2.7 V
      z2-10 (TRQ2) - z2-11 (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 2.7 V
      Engine running, steering wheel turned to left with vehicle stopped 2.3 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)

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

    REPLACE STEERING COLUMN ASSEMBLY Click here