POWER STEERING SYSTEM (for 2GR-FE), Diagnostic DTC:C1511, C1512, C1513, C1514

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

DESCRIPTION

The torque sensor converts the steering wheel rotation torque into electric signals and sends them to the power steering ECU assembly.

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

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

  • Power steering ECU assembly
C1512
C1513
C1514

WIRING DIAGRAM

A01HY99E01

INSPECTION PROCEDURE

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.

    NG

    CONNECT CONNECTOR

    OK

  2. CHECK POWER STEERING ECU ASSEMBLY (TRQV, TRQF VOLTAGE)


    1. A01I063E01
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      Start the engine.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      b-3 (TRQV) - b-1 (TRQG) Engine switch on (IG) 8.5 to 10.5 V
      b-5 (TRQF) - b-1 (TRQG) Engine switch on (IG) 3.35 to 3.37 V

    NG

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    OK

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


    1. A01I063E02
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)

      Start the engine.

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

      Standard Voltage
      Tester Connection Condition (Steering Wheel Position) Specified Condition
      b-7 (TRQ1) - b-1 (TRQG)

      Engine running

      Steering wheel not being turned (without load)

      		 2.3 to 2.7 V

      Engine running

      Steering wheel being turned to the right with vehicle stopped

      		 2.5 to 4.7 V

      Engine running

      Steering wheel being turned to the left with vehicle stopped

      		 0.3 to 2.5 V
      b-2 (TRQ2) - b-1 (TRQG)

      Engine running

      Steering wheel not being turned (without load)

      		 2.3 to 2.7 V

      Engine running

      Steering wheel being turned to the right with vehicle stopped

      		 0.3 to 2.5 V

      Engine running

      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 b-7 (TRQ1) and b-1 (TRQG) and voltage between b-2 (TRQ2) and b-1 (TRQG)

      Engine running

      Steering wheel not being turned (without load)

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

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here