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 assembly.

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

WIRING DIAGRAM


C235572E01


INSPECTION PROCEDURE

NOTICE:
If the steering column assembly or power steering ECU assembly has been replaced, perform 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 assembly.



NG
CONNECT CONNECTOR
OK


2.READ VALUE USING INTELLIGENT TESTER (TORQUE SENSOR 1, TORQUE SENSOR 2)

  1. Turn the power switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (READY).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Chassis / EMPS / Data List.

  1. Select the items "Torque Sensor 1 Output" and "Torque Sensor 2 Output" in the Data List and read the value displayed on the intelligent tester.

    EMPS 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Torque Sensor 1 Output
    		Torque sensor voltage/
    Min.: 0 V
    Max.: 4.9725 V
    		2.3 to 2.7 V
    		Power switch on (READY)
    Steering wheel not being turned (without load)
    2.5 to 3.8 V
    		Power switch on (READY)
    Steering wheel being turned to the right with vehicle stopped
    1.2 to 2.5 V
    		Power switch on (READY)
    Steering wheel being turned to the left with vehicle stopped
    Torque Sensor 2 Output
    		Torque sensor voltage/
    Min.: 0 V
    Max.: 4.9725 V
    		2.3 to 2.7 V
    		Power switch on (READY)
    Steering wheel not being turned (without load)
    1.2 to 2.5 V
    		Power switch on (READY)
    Steering wheel being turned to the right with vehicle stopped
    2.5 to 3.8 V
    		Power switch on (READY)
    Steering wheel being turned to the left with vehicle stopped

    OK:
    Normal condition value is displayed on the intelligent tester during each steering operation.



NG
Go to step 3
OK

REPLACE POWER STEERING ECU ASSEMBLY (Click here)  

3.CHECK POWER STEERING ECU ASSEMBLY (TRQV VOLTAGE)
C113531E36

  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
    z11-6 (TRQV) - z11-8 (TRQG)
    		Power switch on (READY)
    		4.5 to 5.5 V

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



NG
REPLACE POWER STEERING ECU ASSEMBLY (Click here)
OK


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


    C113531E37

  1. Turn the power switch on (READY).

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

    Standard Voltage:
    Tester Connection
    		Condition (Steering Wheel Position)
    		Specified Condition
    z11-5 (TRQ1) - z11-8 (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 3.8 V
    Power switch on (READY)
    Steering wheel being turned to the left with vehicle stopped
    		1.2 to 2.5 V
    z11-7 (TRQ2) - z11-8 (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
    		1.2 to 2.5 V
    Power switch on (READY)
    Steering wheel being turned to the left with vehicle stopped
    		2.5 to 3.8 V

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



NG
REPLACE STEERING COLUMN ASSEMBLY (Click here)
OK

REPLACE POWER STEERING ECU ASSEMBLY (Click here)