Dtc C1511 Torque Sensor Circuit Malfunction

Steering. Yaris. Ncp93, 131
Power Assist Systems. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CONNECTOR CONNECTION CONDITION

INSPECT POWER STEERING ECU ASSEMBLY (TORQUE SENSOR OUTPUT)

INSPECT POWER STEERING ECU ASSEMBLY (TRQ1, TRQ2 VOLTAGE)

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


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.
Detection Item
Trouble Area
C1511
Torque sensor (TRQ1) signal error or stop
  1. Steering column assembly (Torque sensor)
  1. Power steering ECU assembly
C1512
Torque sensor (TRQ2) signal error or stop
C1513
Deviation between torque sensor TRQ1 and TRQ2 exceeds specified value
C1514
Torque sensor power source voltage error
C1517
Temporary control due to malfunction related to torque sensor continues for long time

WIRING DIAGRAM


Yaris. Ncp93, 131.Power Assist Systems.Power Steering System (For Sedan). Dtc C1511 Torque Sensor Circuit Malfunction


INSPECTION PROCEDURE

NOTICE:
If the power steering ECU assembly or steering column assembly has been replaced, perform the torque sensor zero point calibration and assist map writing (YARIS_NCP93 RM000000OSZ018X.html).
1.CHECK CONNECTOR CONNECTION CONDITION

  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.INSPECT POWER STEERING ECU ASSEMBLY (TORQUE SENSOR OUTPUT)
Yaris. Ncp93, 131.Power Assist Systems.Power Steering System (For Sedan). Dtc C1511 Torque Sensor Circuit Malfunction

  1. Start the engine.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    c10-8 (TRQV) - c10-2 (TRQG)
    		Engine running
    		4.5 to 5.5 V
    Text in Illustration
    *a
    		Component with harness connected
    (Power Steering ECU Assembly)


NG
REPLACE POWER STEERING ECU ASSEMBLY (YARIS_NCP93 RM000002XN603ZX.html)
OK


3.INSPECT POWER STEERING ECU ASSEMBLY (TRQ1, TRQ2 VOLTAGE)
Yaris. Ncp93, 131.Power Assist Systems.Power Steering System (For Sedan). Dtc C1511 Torque Sensor Circuit Malfunction

  1. Start the engine.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    c10-9 (TRQ1) - c10-2 (TRQG)
    		Engine running, steering wheel not turned (without load)
    		2.3 to 2.7 V
    c10-9 (TRQ1) - c10-2 (TRQG)
    		Engine running, steering wheel turned to right with vehicle stopped
    		2.5 to 3.8 V
    c10-9 (TRQ1) - c10-2 (TRQG)
    		Engine running, steering wheel turned to left with vehicle stopped
    		1.2 to 2.5 V
    c10-1 (TRQ2) - c10-2 (TRQG)
    		Engine running, steering wheel not turned (without load)
    		2.3 to 2.7 V
    c10-1 (TRQ2) - c10-2 (TRQG)
    		Engine running, steering wheel turned to right with vehicle stopped
    		1.2 to 2.5 V
    c10-1 (TRQ2) - c10-2 (TRQG)
    		Engine running, steering wheel turned to left with vehicle stopped
    		2.5 to 3.8 V
    Text in Illustration
    *a
    		Component with harness connected
    (Power Steering ECU Assembly)

  1. Calculate the difference between the measured TRQV*1 and the sum of the output values of the torque sensor 1 and torque sensor 2.

    HINT:
    *1: TRQV was measured in the previous step.
    OK:
    0.3 V or less


NG
REPLACE STEERING COLUMN ASSEMBLY (YARIS_NCP93 RM000000UCZ031X.html)
OK

REPLACE POWER STEERING ECU ASSEMBLY (YARIS_NCP93 RM000002XN603ZX.html)