POWER STEERING SYSTEM, Diagnostic DTC:C1511/11, C1512/11, C1513/11, C1514/11, C1521/25, C1524/24, C1531/25, C1532/25, C1533/25, C1534/25, C1555/25

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
C1521/25 Short in Motor Circuit
C1524/24 Motor Terminal Voltage Malfunction
C1531/25 ECU Malfunction
C1532/25 ECU Malfunction
C1533/25 Temperature Sensor Circuit is Low or High
C1534/25 EEPROM Malfunction
C1555/25 Motor Relay Welding Failure

DESCRIPTION

The power steering ECU, power steering torque sensor and power steering motor are built into the steering column assembly.

The power steering ECU detects steering force using the signal input from the steering torque sensor, and also monitors the power steering motor circuit for errors.

DTC No. DTC Detection Condition Trouble Area
C1511/11 Torque sensor (TRQ1) signal error or stop

  • Steering column assembly
C1512/11 Torque sensor (TRQ2) signal error or stop
C1513/11 Deviation between torque sensors TRQ1 and TRQ2 exceeds specified value
C1514/11 Torque sensor power source voltage error
C1521/25 Short (or open) in motor circuit or abnormal voltage or current in motor circuit
C1524/24 Short (or open) in motor circuit or abnormal voltage or current in motor circuit
C1531/25

ECU internal malfunction

(CPU malfunction)
C1532/25

ECU internal malfunction

(Peripheral circuit malfunction)
C1533/25

ECU internal malfunction

(Substrate temperature sensor malfunction)
C1534/25

ECU internal malfunction

(EEPROM error)
C1555/25 Motor relay circuit malfunction

WIRING DIAGRAM

A011B9CE01

INSPECTION PROCEDURE

Note

When the steering column assembly is replaced, perform the assist map writing Click here.

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION (STEERING COLUMN ASSEMBLY)


    1. Check the installation condition of the torque sensor and motor connectors.

      OK
      Torque sensor and motor connectors are securely connected to the power steering ECU.

    NG

    CONNECT CONNECTOR

    OK

    REPLACE STEERING COLUMN ASSEMBLY Click here