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 from the steering wheel into electric signals and sends them to the power steering ECU assembly.

DTC No. DTC Detection Condition Trouble Area
C1511 Torque sensor malfunction

  • Torque sensor (built into electric power steering column sub-assembly)

  • Power steering ECU assembly
C1512
C1513
C1514
C1517

WIRING DIAGRAM

A01JCFQE06

INSPECTION PROCEDURE

Note


  • If the power steering ECU assembly has been replaced with a new one, perform rotation angle sensor initialization and torque sensor zero point calibration Click here.

  • If the electric power steering column sub-assembly or power steering motor assembly has been replaced, perform rotation angle sensor initialization and torque sensor zero point calibration Click here.

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (TORQUE SENSOR - ECU)


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

      OK
      Torque sensor connector is securely connected to the power steering ECU assembly.

    NG

    CONNECT CONNECTOR

    OK

  2. CHECK POWER STEERING ECU ASSEMBLY (TRQV VOLTAGE)


    1. A01J9VIE20
      Text in Illustration
      *1

      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 Switch Condition Specified Condition
      z14-6 (TRQV) - z14-8 (TRQG) Power switch on (READY) 4.5 to 5.5 V

    NG

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    OK

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


    1. A01J9VIE21
      Text in Illustration
      *1

      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 Switch Condition (Steering Wheel Position) Specified Condition
      z14-5 (TRQ1) - z14-8 (TRQG)

      Power switch on (READY)

      Steering wheel not turned (without load)

      		 2.3 to 2.7 V

      Power switch on (READY)

      Steering wheel turned to right with vehicle stopped

      		 2.5 to 3.8 V

      Power switch on (READY)

      Steering wheel turned to left with vehicle stopped

      		 1.2 to 2.5 V
      z14-7 (TRQ2) - z14-8 (TRQG)

      Power switch on (READY)

      Steering wheel not turned (without load)

      		 2.3 to 2.7 V

      Power switch on (READY)

      Steering wheel turned to right with vehicle stopped

      		 1.2 to 2.5 V

      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 z14-5 (TRQ1) and z14-8 (TRQG) and voltage between z14-7 (TRQ2) and z14-8 (TRQG)

      Power switch on (READY)

      Steering wheel not being turned (without load)

      		 Between 4.75 V and 5.25 V

      Power switch on (READY)

      Steering wheel being turned to the right with vehicle stopped

      Power switch on (READY)

      Steering wheel being turned to the left with vehicle stopped

    NG

    REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here