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

C273887E06

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. C273615C05

      *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. C273615C07

      *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 hereClick here