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DTC    C1511    Torque Sensor Circuit Malfunction

DTC    C1512    Torque Sensor Circuit Malfunction

DTC    C1513    Torque Sensor Circuit Malfunction

DTC    C1514    Torque Sensor Power Supply Abnormal

DTC    C1517    Torque Hold Abnormal

for Preparation Click here


DESCRIPTION

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

DTC No.
DTC Detection Condition
Trouble Area
C1511
Torque sensor malfunction
  1. Steering column assembly (Torque sensor)
  2. Power steering ECU
C1512
C1513
C1514
C1517

WIRING DIAGRAM


C157863E15


INSPECTION PROCEDURE

NOTICE:
If the steering column assembly or power steering ECU has been replaced, perform the rotation angle sensor value initialization and torque sensor zero point calibration (Click here).

1.CHECK CONNECTOR CONNECTION CONDITION (TORQUE SENSOR - ECU)

  1. Check the installation condition of the torque sensor connector.

    OK:
    Torque sensor connector is securely connected to the power steering ECU.



NG
CONNECT CONNECTOR
OK


2.CHECK POWER STEERING ECU (TRQV VOLTAGE)
C113531E20

  1. Turn the power switch on (READY).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    z14-6 (TRQV) - z14-8 (TRQG)
    		Power switch on (READY)
    		4.5 to 5.5 V

    Text in Illustration 
    *1
    		Component with harness connected
    (Power Steering ECU)



NG
REPLACE POWER STEERING ECU (Click here)
OK


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


    C113531E21

  1. Turn the power switch on (READY).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition (Steering Wheel Position)
    		Specified Condition
    z14-5 (TRQ1) - z14-8 (TRQG)
    		Power switch on (READY)
    Steering wheel not turned (without load)
    		2.3 to 2.7 V
    Power switch on (READY)
    Steering wheel turned to right with vehicle stopped
    		2.5 to 3.8 V
    Power switch on (READY)
    Steering wheel turned to left with vehicle stopped
    		1.2 to 2.5 V
    z14-7 (TRQ2) - z14-8 (TRQG)
    		Power switch on (READY)
    Steering wheel not turned (without load)
    		2.3 to 2.7 V
    Power switch on (READY)
    Steering wheel turned to right with vehicle stopped
    		1.2 to 2.5 V
    Power switch on (READY)
    Steering wheel turned to left with vehicle stopped
    		2.5 to 3.8 V

  1. 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 z14-5 (TRQ1) and z14-8 (TRQG) and voltage between z14-7 (TRQ2) and z14-8 (TRQG)
    		Power switch on (READY)
    Steering wheel not being turned (without load)
    		Between 4.75 V and 5.25 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 
    *1
    		Component with harness connected
    (Power Steering ECU)



NG
REPLACE STEERING COLUMN ASSEMBLY (Click here)
OK

REPLACE POWER STEERING ECU (Click here)