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 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

WIRING DIAGRAM

A004YY2E06
*a Torque Sensor
*b Steering Column Assembly
*c Power Steering ECU Assembly

CAUTION / NOTICE / HINT

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.

PROCEDURE


  1. 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.

    NG

    CONNECT CONNECTOR

    OK

  2. CHECK POWER STEERING ECU ASSEMBLY (TRQV VOLTAGE)


    1. A004WPAE02
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      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

    NG

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    OK

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


    1. A005023E02
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      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

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

    REPLACE STEERING COLUMN ASSEMBLY Click here