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

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

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 Note
C1511 Torque Sensor1 Torque sensor malfunction

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

  • Power steering ECU assembly

 EPS warning light: Comes on -
C1512 Torque Sensor2 Torque sensor malfunction

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

  • Power steering ECU assembly

 EPS warning light: Comes on -
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 -
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 -

WIRING DIAGRAM

A018KRKE06

CAUTION / NOTICE / HINT

Note

If the power steering ECU assembly has been replaced, perform assist map writing.

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, TRQF VOLTAGE)


    1. A018LLDC05
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      Turn the ignition switch ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      a-3 (TRQV) - a-1 (TRQG) Ignition switch ON 8.5 to 10.5 V
      a-5 (TRQF) - a-1 (TRQG) Ignition switch ON 3.35 to 3.37 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. A018LLDC06
      *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
      a-7 (TRQ1) - a-1 (TRQG) Engine running and steering wheel not being turned (without load) 2.3 to 2.7 V
      a-2 (TRQ2) - a-1 (TRQG) Engine running and steering wheel not being turned (without load) 2.3 to 2.7 V
      a-7 (TRQ1) - a-1 (TRQG) Engine running and steering wheel being turned to the right with vehicle stopped 2.5 to 4.7 V
      a-7 (TRQ1) - a-1 (TRQG) Engine running and steering wheel being turned to the left with vehicle stopped 0.3 to 2.5 V
      a-2 (TRQ2) - a-1 (TRQG) Engine running and steering wheel being turned to the right with vehicle stopped 0.3 to 2.5 V
      a-2 (TRQ2) - a-1 (TRQG) Engine running and steering wheel being turned to the left with vehicle stopped 2.5 to 4.7 V

    3. Under each condition, measure the voltage according to the value(s) in the table blow, and calculate the sum.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Sum of voltage between a-7 (TRQ1) and a-1 (TRQG) and voltage between a-2 (TRQ2) and a-1 (TRQG) Engine running and steering wheel not being turned (without load) Between 4.85 V and 5.35 V
      Engine running and steering wheel being turned to the right with vehicle stopped
      Engine running and 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