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

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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
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DESCRIPTION

The torque sensor converts the rotation torque input from the steering wheel into electric signals and sends them to the power steering ECU assembly.

DTC No. DTC Detection Condition Trouble Area
C1511 Torque sensor malfunction

  • Steering column assembly (Torque sensor)

  • Power steering ECU assembly
C1512
C1513
C1514
C1517
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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

If the steering column assembly or power steering ECU assembly has been replaced, perform rotation angle sensor value initialization and torque sensor zero point calibration (Click here).

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PROCEDURE


  1. Click here

    CHECK CONNECTOR CONNECTION CONDITION (TORQUE SENSOR - ECU)


    1. Check the installation condition of the torque sensor connector.

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

  2. Click here

    CHECK POWER STEERING ECU ASSEMBLY (TRQV VOLTAGE)


    1. A003YODE36

      Turn the power switch on (READY).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      z11-6 (TRQV) - z11-8 (TRQG) Power switch on (READY) 4.5 to 5.5 V
      Table 1. Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

  3. Click here

    CHECK POWER STEERING ECU ASSEMBLY (TRQ1, TRQ2 VOLTAGE)


    1. A003YODE37

      Turn the power switch on (READY).

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

      Standard Voltage
      Tester Connection Condition (Steering Wheel Position) Specified Condition
      z11-5 (TRQ1) - z11-8 (TRQG)

      Power switch on (READY)

      Steering wheel not being turned (without load)

      		 2.3 to 2.7 V

      Power switch on (READY)

      Steering wheel being turned to the right with vehicle stopped

      		 2.5 to 3.8 V

      Power switch on (READY)

      Steering wheel being turned to the left with vehicle stopped

      		 1.2 to 2.5 V
      z11-7 (TRQ2) - z11-8 (TRQG)

      Power switch on (READY)

      Steering wheel not being turned (without load)

      		 2.3 to 2.7 V

      Power switch on (READY)

      Steering wheel being turned to the right with vehicle stopped

      		 1.2 to 2.5 V

      Power switch on (READY)

      Steering wheel being turned to the left with vehicle stopped

      		 2.5 to 3.8 V

    3. Under each condition, measure the voltage at terminals TRQ1 and TRQ2, and calculate the sum.

      Standard Voltage
      Inspection Item Condition (Steering Wheel Position) Specified Condition
      Sum of voltage between z11-5 (TRQ1) and z11-8 (TRQG) and voltage between z11-7 (TRQ2) and z11-8 (TRQG)

      Engine running

      Steering wheel not being turned (without load)

      		 Between 4.75 V and 5.25 V

      Engine running

      Steering wheel being turned to the right with vehicle stopped

      Engine running

      Steering wheel being turned to the left with vehicle stopped
      Table 2. Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

  4. Click here

    CONNECT CONNECTOR

  5. Click here

    REPLACE POWER STEERING ECU ASSEMBLYClick here

  6. Click here

    REPLACE STEERING COLUMN ASSEMBLYClick here