POWER ASSIST SYSTEMS  POWER STEERING SYSTEM  C1511  Torque Sensor1  C1512  Torque Sensor2  C1513  Torque Sensor Deviation Excessive  C1514  Torque Sensor Power Supply Voltage  C1517  Torque Hold  


DESCRIPTION

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

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note
C1511 Torque Sensor1 Torque sensor malfunction
·

Torque sensor (Electric power steering column sub-assembly)

·

Power steering ECU assembly


EPS warning light: Comes on Ignition switch ON again -
C1512 Torque Sensor2 Torque sensor malfunction
·

Torque sensor (Electric power steering column sub-assembly)

·

Power steering ECU assembly


EPS warning light: Comes on Ignition switch ON again -
C1513 Torque Sensor Deviation Excessive Torque sensor malfunction
·

Torque sensor (Electric power steering column sub-assembly)

·

Power steering ECU assembly


EPS warning light: Comes on Ignition switch ON again -
C1514 Torque Sensor Power Supply Voltage Torque sensor malfunction
·

Torque sensor (Electric power steering column sub-assembly)

·

Power steering ECU assembly


EPS warning light: Comes on Ignition switch ON again -
C1517 Torque Hold Torque sensor malfunction
·

Torque sensor (Electric power steering column sub-assembly)

·

Power steering ECU assembly


EPS warning light: Comes on Ignition switch ON again -

WIRING DIAGRAM

C245322E21
4.344,2.781 6.521,3.094 2.177,0.313 10 false Power Steering ECU Assembly 0.865,2.677 3.354,3.24 2.49,0.563 10 false Torque Sensor (Electric Power Steering Column Sub-assembly) 4.646,1.271 5.094,1.49 0.448,0.219 10 false TRQ1 4.344,2.604 4.531,2.781 0.188,0.177 10 false z7 4.448,0.75 4.583,0.927 0.135,0.177 10 false 8 4.448,1.177 4.583,1.354 0.135,0.177 10 false 9 4.438,1.594 4.573,1.771 0.135,0.177 10 false 1 4.438,2.01 4.573,2.188 0.135,0.177 10 false 2 4.635,0.875 5.083,1.094 0.448,0.219 10 false TRQV 4.635,1.719 5.083,1.938 0.448,0.219 10 false TRQ2 4.635,2.115 5.083,2.333 0.448,0.219 10 false TRQG

CAUTION / NOTICE / HINT

NOTICE:
·

If the electric power steering column sub-assembly has been replaced, perform torque sensor zero point calibration.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>CALIBRATION

·

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

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM>CALIBRATION



PROCEDURE

1.CHECK CONNECTOR CONNECTION CONDITION
a.

Check the connection condition of the torque sensor connector.

OK:

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



Result:
Proceed to
OK
NG



OK

2.CHECK POWER STEERING ECU ASSEMBLY (TRQV VOLTAGE)

NG

CONNECT CONNECTOR

2.CHECK POWER STEERING ECU ASSEMBLY (TRQV VOLTAGE)
a.
C238943C09
0.771,0.688 1.083,0.917 0.313,0.229 0.885,2.104 1.083,3.042 false 0.875,1.844 0.542,3.042 false 0.177,0.146 0.688,0.438 0.51,0.292 10 false *a 0.906,3.083 1.427,3.292 0.521,0.208 10 false TRQV 0.865,0.708 1.125,0.99 0.26,0.281 10 false z7 0.365,3.083 0.885,3.292 0.521,0.208 10 false TRQG
*a Component with harness connected
(Power Steering ECU Assembly)


Turn the ignition switch to ON.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
z7-8 (TRQV) - z7-2 (TRQG) Ignition switch ON 4.5 to 5.5 V



Result:
Proceed to
OK
NG



OK

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

NG

REPLACE POWER STEERING ECU ASSEMBLY

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING ECU>REMOVAL


3.CHECK POWER STEERING ECU ASSEMBLY (TRQ1, TRQ2 VOLTAGE)
a.
C238943C10
0.688,0.854 1.01,1.083 0.323,0.229 0.792,2.094 0.5,2.833 false 0.969,1.833 1.469,2.813 false 0.875,1.844 1,2.823 false 0.792,0.896 1.104,1.219 0.313,0.323 10 false z7 1.333,2.875 1.865,3.135 0.531,0.26 10 false TRQ2 0.354,2.865 0.813,3.104 0.458,0.24 10 false TRQ1 0.146,0.135 0.458,0.292 0.313,0.156 10 false *a 0.865,2.875 1.396,3.135 0.531,0.26 10 false TRQG
*a Component with harness connected
(Power Steering ECU Assembly)


Start the engine.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
z7-9 (TRQ1) - z7-2 (TRQG) Engine running and steering wheel not being turned (without load) 2.3 to 2.7 V
z7-1 (TRQ2) - z7-2 (TRQG) Engine running and steering wheel not being turned (without load) 2.3 to 2.7 V
z7-9 (TRQ1) - z7-2 (TRQG) Engine running and steering wheel being turned to the right with vehicle stopped 2.5 to 3.8 V
z7-1 (TRQ2) - z7-2 (TRQG) Engine running and steering wheel being turned to the right with vehicle stopped 1.2 to 2.5 V
z7-9 (TRQ1) - z7-2 (TRQG) Engine running and steering wheel being turned to the left with vehicle stopped 1.2 to 2.5 V
z7-1 (TRQ2) - z7-2 (TRQG) Engine running and steering wheel being turned to the left with vehicle stopped 2.5 to 3.8 V



c.

Under each condition, measure the voltage at terminals TRQ1 and TRQ2, and calculate the sum.

Standard Voltage:
Tester Connection Condition Specified Condition
Sum of voltage between z7-9 (TRQ1) and z7-2 (TRQG) and voltage between z7-1 (TRQ2) and z7-2 (TRQG) Engine running and steering wheel not being turned (without load) Between 4.75 V and 5.25 V
Engine running and steering wheel being turned to the right with vehicle stopped
Engine running and steering wheel being turned to the left with vehicle stopped



Result:
Proceed to
OK
NG



OK

REPLACE POWER STEERING ECU ASSEMBLY

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING ECU>REMOVAL


NG

REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>REMOVAL