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

DTC Code DTC Name
C1511/11 Torque Sensor 1 Malfunction
C1512/11 Torque Sensor 2 Malfunction
C1513/11 Torque Sensor Deviation Excessive
C1514/11 Torque Sensor Power Supply Voltage Malfunction

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

C1511/11

Torque Sensor 1 Malfunction

Torque sensor malfunction

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

  • Power steering ECU assembly

On

Power switch on (IG) again

C1512/11

Torque Sensor 2 Malfunction

Torque sensor malfunction

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

  • Power steering ECU assembly

On

Power switch on (IG) again

C1513/11

Torque Sensor Deviation Excessive

Torque sensor malfunction

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

  • Power steering ECU assembly

On

Power switch on (IG) again

C1514/11

Torque Sensor Power Supply Voltage Malfunction

Torque sensor malfunction

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

  • Power steering ECU assembly

On

Power switch on (IG) again

WIRING DIAGRAM

C240198E02

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 (TORQUE SENSOR - ECU)

    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. C277341C02

      *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

      Switch Condition

      Specified Condition

      a-3 (TRQV) - a-1 (TRQG)

      Power switch on (READY)

      8.5 to 10.5 V

      a-5 (TRQF) - a-1 (TRQG)

      Power switch on (READY)

      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. C277341C01

      *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 (Steering Wheel Position)

      Specified Condition

      a-7 (TRQ1) - a-1 (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 4.7 V

      Power switch on (READY) Steering wheel being turned to the left with vehicle stopped

      0.3 to 2.5 V

      a-2 (TRQ2) - a-1 (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

      0.3 to 2.5 V

      Power switch on (READY) Steering wheel being turned to the left with vehicle stopped

      2.5 to 4.7 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 a-7 (TRQ1) and a-1 (TRQG) and voltage between a-2 (TRQ2) and a-1 (TRQG)

      Power switch on (READY) Steering wheel not being turned (without load)

      Between 4.85 V and 5.35 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 ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY

    Click here