POWER STEERING SYSTEM, Diagnostic DTC:C1511, C1512, C1513, C1514, C1517

DTC Code DTC Name
C1511 Torque Sensor Circuit Malfunction
C1512 Torque Sensor Circuit Malfunction
C1513 Torque Sensor Circuit Malfunction
C1514 Torque Sensor Power Supply Abnormal
C1517 Torque Hold Abnormal

DESCRIPTION

The torque sensor converts the rotation torque input to the steering wheel into an electrical signal and sends it to the power steering ECU. Based on this signal, the ECU detects steering effort.

DTC No. DTC Detection Condition Trouble Area
C1511 Torque sensor (TRQ1) signal error or stop

  • Steering column assembly (torque sensor)

  • Power steering ECU
C1512 Torque sensor (TRQ2) signal error or stop
C1513 Deviation between torque sensors TRQ1 and TRQ2 exceeds specified value
C1514 Torque sensor power source voltage error
C1517 Temporary control due to malfunction related to torque sensor continues for long time

WIRING DIAGRAM

A01NE2BE12

INSPECTION PROCEDURE

Note

If the power steering ECU and steering column assembly have been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration Click here.

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION


    1. Check the installation condition of the torque sensor connector.

      OK
      The torque sensor connector is securely connected to the power steering ECU.

    NG

    CONNECT CONNECTOR

    OK

  2. CHECK POWER STEERING ECU (TRQV VOLTAGE)


    1. A01NDDHE17
      Text in Illustration
      *1

      Component with harness connected

      (Power Steering ECU)

      Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      z12-6 (TRQV) - z12-8 (TRQG) Power switch on (IG) 4.5 to 5.5 V

    NG

    REPLACE POWER STEERING ECU Click here

    OK

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


    1. A01NDDHE19
      Text in Illustration
      *1

      Component with harness connected

      (Power Steering ECU)

      Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      z12-5 (TRQ1) - z12-8 (TRQG) The power switch on (READY), steering wheel not turned (without load). 2.3 to 2.7 V
      The power switch on (READY), steering wheel turned to right with vehicle stopped. 2.5 to 3.8 V
      The power switch on (READY), steering wheel turned to left with vehicle stopped. 1.2 to 2.5 V
      z12-7 (TRQ2) - z12-8 (TRQG) The power switch on (READY), steering wheel not turned (without load). 2.3 to 2.7 V
      The power switch on (READY), steering wheel turned to right with vehicle stopped. 1.2 to 2.5 V
      The power switch on (READY), steering wheel turned to 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
      Inspection Item Condition (Steering Wheel Position) Specified Condition
      Sum of voltage between z12-5 (TRQ1) and z12-8 (TRQG) and voltage between z12-7 (TRQ2) and z12-8 (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

    NG

    REPLACE STEERING COLUMN ASSEMBLY Click here

    OK

    REPLACE POWER STEERING ECU Click here