POWER STEERING SYSTEM, Diagnostic DTC:C1511/11, C1512/11, C1513/11, 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. DTC Detection Condition Trouble Area
C1511/11 Torque sensor malfunction

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

  • Power steering ECU assembly
C1512/11
C1513/11
C1514/11

WIRING DIAGRAM

A011YD2E02

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. Turn the power switch on (IG).

      A011X8AE03

    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 (IG) 8.5 to 10.5 V
      a-5 (TRQF) - a-1 (TRQG) Power switch on (IG) 3.35 to 3.37 V
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)
    NG

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    OK

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

    1. Turn the power switch on (READY).

      A011X8AE04

    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
      Text in Illustration
      *a

      Component with harness connected

      (Power Steering ECU Assembly)
    NG

    REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here