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 received 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 (Electric power steering column sub-assembly)

  • Power steering ECU assembly
C1512
C1513
C1514
C1517

WIRING DIAGRAM

A0008W5E34
*a Torque Sensor (Electric Power Steering Column Sub-assembly)
*b Power Steering ECU Assembly

CAUTION / NOTICE / HINT

Note


  • If the electric power steering column sub-assembly has been replaced with a new one, perform torque sensor zero point calibration Click here.

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

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION


    1. Check the connection 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. A0006L9E01
      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
      z18-8 (TRQV) - z18-2 (TRQG) Power switch on (IG) 4.5 to 5.5 V
      Result
      Result Proceed to
      OK A
      NG (for Manual tilt and manual telescopic steering column) B
      NG (for Power tilt and power telescopic steering column) C

    B

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    C

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    A

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


    1. A00094RE01
      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 Specified Condition
      z18-9 (TRQ1) - z18-2 (TRQG)

      Power switch on (READY)

      Steering wheel not being turned (without load)

      		 2.3 to 2.7 V
      z18-1 (TRQ2) - z18-2 (TRQG)
      z18-9 (TRQ1) - z18-2 (TRQG)

      Power switch on (READY)

      Steering wheel being turned to the right with vehicle stopped

      		 2.5 to 3.8 V
      z18-1 (TRQ2) - z18-2 (TRQG) 1.2 to 2.5 V
      z18-9 (TRQ1) - z18-2 (TRQG)

      Power switch on (READY)

      Steering wheel being turned to the left with vehicle stopped

      		 1.2 to 2.5 V
      z18-1 (TRQ2) - z18-2 (TRQG) 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 Specified Condition
      Sum of voltage between z18-9 (TRQ1) and z18-2 (TRQG) and voltage between z18-1 (TRQ2) and z18-2 (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
      Result
      Result Proceed to
      OK (for Manual tilt and manual telescopic steering column) A
      OK (for Power tilt and power telescopic steering column) B
      NG C

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    B

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    C

    REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY Click here