POWER STEERING SYSTEM, Diagnostic DTC:C1511, C1512, C1513, C1514, C1521, C1522, C1523, C1528, C1531, C1532, C1533, C1534, C1555

DTC Code DTC Name
C1511 Torque Sensor1
C1512 Torque Sensor2
C1513 Torque Sensor Deviation Excessive
C1514 Torque Sensor Power Supply Voltage
C1521 Short in Motor Circuit
C1522 Power Supply Sensor
C1523 Current Deviation Excessive
C1528 Motor Rotation Angle Sensor
C1531 ECU Malfunction
C1532 ECU Malfunction
C1533 Temperature Sensor Circuit is Low or High
C1534 EEPROM
C1555 Motor Relay Welding Failure

DESCRIPTION

While torque sensor system, motor system or ECU system malfunctions are detected, the fail-safe function suspends power assist. However, power assist continues with limited assistance amount if only C1533 or C1534 is output.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1511 Torque Sensor1 Torque sensor malfunction Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1512 Torque Sensor2 Torque sensor malfunction Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1513 Torque Sensor Deviation Excessive Torque sensor malfunction Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1514 Torque Sensor Power Supply Voltage Torque sensor malfunction Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1521 Short in Motor Circuit Motor overcurrent Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1522 Power Supply Sensor Motor current sensor malfunction Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1523 Current Deviation Excessive Excessively large current deviation Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1528 Motor Rotation Angle Sensor Motor rotation angle sensor malfunction Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1531 ECU Malfunction ECU internal malfunction (CPU malfunction) Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1532 ECU Malfunction ECU internal malfunction (Peripheral circuit malfunction) Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1533 Temperature Sensor Circuit is Low or High ECU internal malfunction (Substrate temperature sensor malfunction) Rack and pinion power steering gear assembly EPS warning light: Comes on The ECU judges the system has returned to normal -
C1534 EEPROM ECU internal malfunction (EEPROM error) Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -
C1555 Motor Relay Welding Failure Motor relay circuit malfunction Rack and pinion power steering gear assembly EPS warning light: Comes on Ignition switch is turned to ON again -

CAUTION / NOTICE / HINT

Note

If the rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.


      Chassis > EMPS > Clear DTCs

    2. Check for DTCs.


      Chassis > EMPS > Trouble Codes
      Result
      Result Proceed to
      DTCs other than C1521, C1522, C1523, C1524, C1528, C1531, C1532, C1533, C1534 or C1555 are not output. A
      DTCs other than C1521, C1522, C1523, C1524, C1528, C1531, C1532, C1533, C1534 or C1555 are output. B
      DTCs are not output. C

    A

    REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY Click here

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    C

    USE SIMULATION METHOD TO CHECK Click here