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

DTC Code DTC Name
C1511 Torque Sensor1
C1512 Torque Sensor2
C1513 Torque Sensor Deviation Excessive
C1514 Torque Sensor Power Supply Voltage
C1517 Torque Hold

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

  • Torque sensor (Steering post assembly)

  • Power steering ECU assembly
C1512
C1513
C1514
C1517

WIRING DIAGRAM

A00413KE17

INSPECTION PROCEDURE

Note


  • If the power steering ECU assembly has been replaced with a new one, perform assist map writing and rotation angle sensor value initialization torque sensor zero point calibration after performing the initialization of the torque sensor zero point value Click here.

  • If the steering post assembly has been replaced with a new one, perform rotation angle sensor value initialization torque sensor zero point calibration after performing the initialization of the torque sensor zero point value 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. A0041JIE43
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      z14-6 (TRQV) - z14-8 (TRQG) Power switch on (IG) 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. A0041JIE44
      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
      z14-5 (TRQ1) - z14-8 (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
      z14-7 (TRQ2) - z14-8 (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 z14-5 (TRQ1) and z14-8 (TRQG) and voltage between z14-7 (TRQ2) and z14-8 (TRQG)

      Power switch on (READY)

      Steering wheel not being turned (without load)

      		 Between 4.75 V and 5.25 V

      Power switch on (READY)

      Steering wheel being turned to the right with vehicle stopped

      Power switch on (READY)

      Steering wheel being turned to the left with vehicle stopped

    NG

    REPLACE STEERING POST ASSEMBLY Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here