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. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1511 Torque Sensor1 Torque sensor malfunction

  • Torque sensor (Electric power steering column sub-assembly)

  • Power steering ECU assembly

 EPS Warning Light: Comes on Ignition switch ON again -
C1512 Torque Sensor2 Torque sensor malfunction

  • Torque sensor (Electric power steering column sub-assembly)

  • Power steering ECU assembly

 EPS Warning Light: Comes on Ignition switch ON again -
C1513 Torque Sensor Deviation Excessive Torque sensor malfunction

  • Torque sensor (Electric power steering column sub-assembly)

  • Power steering ECU assembly

 EPS Warning Light: Comes on Ignition switch ON again -
C1514 Torque Sensor Power Supply Voltage Torque sensor malfunction

  • Torque sensor (Electric power steering column sub-assembly)

  • Power steering ECU assembly

 EPS Warning Light: Comes on Ignition switch ON again -
C1517 Torque Hold Torque sensor malfunction

  • Torque sensor (Electric power steering column sub-assembly)

  • Power steering ECU assembly

 EPS Warning Light: Comes on Ignition switch ON again -

WIRING DIAGRAM

A012JARE06
*a Torque Sensor (Electric Power Steering Column 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.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CONNECTOR

    OK

  2. CHECK POWER STEERING ECU ASSEMBLY (TRQV VOLTAGE)


    1. A012L39C05
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      z7-2 (TRQV) - z7-5 (TRQG) Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    OK

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


    1. A012L39C07
      *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
      z7-1 (TRQ1) - z7-5 (TRQG) Engine running, steering wheel not being turned (without load) 2.3 to 2.7 V
      z7-4 (TRQ2) - z7-5 (TRQG)
      z7-1 (TRQ1) - z7-5 (TRQG) Engine running, steering wheel being turned to the right with vehicle stopped 2.5 to 3.8 V
      z7-4 (TRQ2) - z7-5 (TRQG) 1.2 to 2.5 V
      z7-1 (TRQ1) - z7-5 (TRQG) Engine running, steering wheel being turned to the left with vehicle stopped 1.2 to 2.5 V
      z7-4 (TRQ2) - z7-5 (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
      Tester Connection Condition Specified Condition
      Sum of voltage between z7-1 (TRQ1) and z7-5 (TRQG) and voltage between z7-4 (TRQ2) and z7-5 (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
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

    REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY Click here