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 rotational 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 The ECU judges the system has returned to normal or the power switch is turned on (IG) again -
C1512 Torque Sensor2 Torque sensor malfunction

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

  • Power steering ECU assembly

 EPS warning light: Comes on The ECU judges the system has returned to normal or the power switch is turned on (IG) 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 The ECU judges the system has returned to normal or the power switch is turned on (IG) 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 Power switch on (IG) again -
C1517 Torque Hold Torque sensor malfunction

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

  • Power steering ECU assembly

 EPS warning light: Comes on Power switch on (IG) again -

WIRING DIAGRAM

B004PLPE10
*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, perform torque sensor zero point calibration.

    Click here

  • If the power steering ECU assembly has been replaced, 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. B004PBHC21
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      Turn the power switch to on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      z17-7 (TRQV1) - z17-8 (TRQG1) power switch on (IG) 4.5 to 5.5 V
      z17-3 (TRQV2) - z17-2 (TRQG2) power switch on (IG) 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POWER STEERING ECU ASSEMBLY for LHD: Click here
    REPLACE POWER STEERING ECU ASSEMBLY for RHD: Click here

    OK

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


    1. B004PBHC22
      *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
      z17-9 (TRQ1) - z17-8 (TRQG1) Power switch on (READY) and steering wheel not being turned (without load) 2.3 to 2.7 V
      Power switch on (READY) and steering wheel being turned to the right with vehicle stopped 2.5 to 3.8 V
      Power switch on (READY) and steering wheel being turned to the left with vehicle stopped 1.2 to 2.5 V
      z17-1 (TRQ2) - z17-2 (TRQG2) Power switch on (READY) and steering wheel not being turned (without load) 2.3 to 2.7 V
      Power switch on (READY) and steering wheel being turned to the right with vehicle stopped 1.2 to 2.5 V
      Power switch on (READY) and 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
      Tester Connection Condition Specified Condition
      Sum of voltage between z17-9 (TRQ1) and z17-8 (TRQG1) and voltage between z17-1 (TRQ2) and z17-2 (TRQG2) Power switch on (READY) and steering wheel not being turned (without load) Between 4.75 V and 5.25 V
      Power switch on (READY) and steering wheel being turned to the right with vehicle stopped
      Power switch on (READY) and steering wheel being turned to the left with vehicle stopped
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY for LHD: Click here
    REPLACE POWER STEERING ECU ASSEMBLY for RHD: Click here

    NG

    REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY Click here