POWER STEERING SYSTEM, Diagnostic DTC:C1511/11, C1512/11, C1513/11, C1514/11, C1517/11

DTC Code DTC Name
C1511/11 Torque Sensor1
C1512/11 Torque Sensor 2 Malfunction
C1513/11 Torque Sensor Deviation Excessive
C1514/11 Torque Sensor Power Supply Voltage Malfunction
C1517/11 Torque Hold

DESCRIPTION

The torque sensor converts the steering wheel rotation torque 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
C1511/11 Torque Sensor1 Torque sensor malfunction

  • Torque sensor (Steering column assembly)

  • Power steering ECU assembly

 On Power switch on (IG) again -
C1512/11 Torque Sensor 2 Malfunction Torque sensor malfunction

  • Torque sensor (Steering column assembly)

  • Power steering ECU assembly

 On Power switch on (IG) again -
C1513/11 Torque Sensor Deviation Excessive Torque sensor malfunction

  • Torque sensor (Steering column assembly)

  • Power steering ECU assembly

 On Power switch on (IG) again -
C1514/11 Torque Sensor Power Supply Voltage Malfunction Torque sensor malfunction

  • Torque sensor (Steering column assembly)

  • Power steering ECU assembly

 On Power switch on (IG) again -
C1517/11 Torque Hold Torque sensor malfunction

  • Torque sensor (Steering column assembly)

  • Power steering ECU assembly

 On Power switch on (IG) again -

WIRING DIAGRAM

A01MIPLE02
*a Torque Sensor (built into Steering Column Assembly)
*b Power Steering ECU Assembly

CAUTION / NOTICE / HINT

Note


  • If the steering column assembly has been replaced, perform rotation angle sensor value initialization and torque sensor zero point calibration.

    Click here

  • If the power steering ECU assembly has been replaced, perform assist map writing, rotation angle sensor value initialization 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. A01MHLYC25
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      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
      z9-6 (TRQV) - z9-8 (TRQG) Power switch on (IG) 4.5 to 5.5 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. A01MHLYC26
      *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
      z9-5 (TRQ1) - z9-8 (TRQG) Power switch on (READY), steering wheel not being turned (without load) 2.3 to 2.7 V
      Power switch on (READY), steering wheel being turned to the right with vehicle stopped 2.5 to 3.8 V
      Power switch on (READY), steering wheel being turned to the left with vehicle stopped 1.2 to 2.5 V
      z9-7 (TRQ2) - z9-8 (TRQG) Power switch on (READY), steering wheel not being turned (without load) 2.3 to 2.7 V
      Power switch on (READY), steering wheel being turned to the right with vehicle stopped 1.2 to 2.5 V
      Power switch on (READY), steering wheel being turned to the left with vehicle stopped 2.5 to 3.8 V

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Sum of voltage between z9-5 (TRQ1) and z9-8 (TRQG) and voltage between z9-7 (TRQ2) and z9-8 (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
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

    REPLACE STEERING COLUMN ASSEMBLY Click here