ELECTRONIC POWER STEERING SYSTEM, Diagnostic DTC:C1511/11, C1512/12, C1513/13, C1514/14, C1517/17

DTC Code DTC Name
C1511/11 Torque Sensor 1 Malfunction
C1512/12 Torque Sensor Circuit Malfunction
C1513/13 Torque Sensor Circuit Malfunction
C1514/14 Torque Sensor Power Source Circuit Malfunction
C1517/17 Torque Sensor Hold Malfunction

DESCRIPTION

The torque sensor converts the power input from the steering wheel into electric signals, and sends it to the ECU.

DTC No. DTC Detecting Condition Trouble Areas
C1511/11 Torque sensor signal malfunctioning, or torque sensor circuit open

  • Steering column assembly (Torque sensor)

  • Power steering ECU assembly
C1512/12
C1513/13
C1514/14 Torque sensor power source voltage malfunction
C1517/17 Temporary control activated by torque sensor malfunction continues for long time

WIRING DIAGRAM

A013768E01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and push the intelligent tester main switch ON.

    3. Select the item TORQUE SENSOR 1 OUTPUT and TORQUE SENSOR 2 OUTPUT in the DATA LIST and read the value displayed on the intelligent tester.

    4. Check the value on the torque sensor 1 output and torque sensor 2 output of the data monitor with the steering wheel in the center value position (no load).

      Standard Voltage
      2.3 to 2.7 V

    5. Check the difference in the values between torque sensor 1 output and torque sensor 2 output with the steering wheel in the center value position (no load)

      Standard Voltage
      0.3 V or less

    6. Check the values of the data monitor when turning the steering wheel.

      (1) Turn the steering wheel to the right end from the center value position, and check the values on the torque sensor 1 output and torque sensor 2 output of the data monitor.

      Standard Voltage
      2.5 to 4.7 V

      (2) Turn the steering wheel to the left end from the center value position, and check the values on the torque sensor 1 output and torque sensor 2 output of the data monitor.

      Standard Voltage
      0.3 to 2.5 V

      (3) Check the difference in the values between torque sensor 1 output and torque sensor 2 output.

      Standard Voltage
      0.3 V or less
      OK
      All the check results shown above are within their standard ranges.

    NG

    CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - STEERING COLUMN ASSEMBLY(TORQUE SENSOR)) Click here

    OK

  2. INSPECT POWER STEERING ECU ASSEMBLY

    A0138GUE02

    1. Measure the voltage between terminals torque sensor V and torque sensor G of the power steering ECU assembly connector.

      Standard Voltage
      7.5 to 8.5 V

    NG

    CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - STEERING COLUMN ASSEMBLY(TORQUE SENSOR)) Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY

  3. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - STEERING COLUMN ASSEMBLY(TORQUE SENSOR))

    A0138GUE04

    1. Measure the voltage.

      Standard Voltage
      Condition TRQ 1 TRQ 2
      Center position 2.3 to 2.7 V 2.3 to 2.7 V
      Turned right 2.5 to 4.7 V 2.5 to 4.7 V
      Turned left 0.3 to 2.5 V 0.3 to 2.5 V

    NG

    REPLACE POWER STEERING ECU ASSEMBLY

    OK

    REPLACE STEERING COLUMN ASSEMBLY