Dtc C1511 Torque Sensor Circuit Malfunction

Steering. Corolla. Zre142 Aze141
Power Assist Systems. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CONNECTOR CONNECTION CONDITION (TORQUE SENSOR - ECU)

CHECK POWER STEERING ECU (TOQUE SENSOR OUTPUT)

CHECK STEERING COLUMN ASSEMBLY (TORQUE SENSOR)

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 power steering ECU calculates assisting power based on steering torque signals from the torque sensor. If these DTCs are stored in the power steering ECU, the ECU stops steering power assist as a fail-safe function.

DTC No.
DTC Detection Condition
Trouble Area
C1511
Torque sensor (TRQ1) signal error or stop
  1. Steering column assembly (torque sensor)
  1. Power steering ECU
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


Corolla. Zre142 Aze141.Power Assist Systems.Power Steering System (For 2Az-Fe). Dtc C1511 Torque Sensor Circuit Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. If the power steering ECU has been replaced with a new one, perform the assist map writing and the torque sensor zero point calibration (COROLLA_ZRE142 RM00000275305DX.html).
  2. If the steering column assembly has been replaced with a new one, perform the torque sensor zero point calibration after performing the initialization of the torque sensor zero point value (COROLLA_ZRE142 RM00000275305DX.html).
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 (TOQUE SENSOR OUTPUT)


    Corolla. Zre142 Aze141.Power Assist Systems.Power Steering System (For 2Az-Fe). Dtc C1511 Torque Sensor Circuit Malfunction

  1. Turn the ignition switch on (IG).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    a3-6 (TRQV) - a3-8 (TRQG)
    		Ignition switch on (IG)
    		4.5 to 5.5 V


NG
REPLACE POWER STEERING ECU (COROLLA_ZRE142 RM000002XN605BX.html)
OK


3.CHECK STEERING COLUMN ASSEMBLY (TORQUE SENSOR)


    Corolla. Zre142 Aze141.Power Assist Systems.Power Steering System (For 2Az-Fe). Dtc C1511 Torque Sensor Circuit Malfunction

  1. Turn the ignition switch on (IG).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition (Steering Position)
    		Specified Condition
    a3-5 (TRQ1) - a3-8 (TRQG)
    		Ignition switch on (IG)
    Center position
    		2.3 to 2.7 V
    a3-7 (TRQ2) - a3-8 (TRQG)
    		Ignition switch on (IG)
    Center position
    		2.3 to 2.7 V
    a3-5 (TRQ1) - a3-8 (TRQG)
    		Ignition switch on (IG)
    Turned to right
    		2.5 to 3.8 V
    a3-7 (TRQ2) - a3-8 (TRQG)
    		Ignition switch on (IG)
    Turned to right
    		1.2 to 2.5 V
    a3-5 (TRQ1) - a3-8 (TRQG)
    		Ignition switch on (IG)
    Turned to left
    		1.2 to 2.5 V
    a3-7 (TRQ2) - a3-8 (TRQG)
    		Ignition switch on (IG)
    Turned to left
    		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 a3-5 (TRQ1) and a3-8 (TRQG) and voltage between a3-7 (TRQ2) and a3-8 (TRQG)
    		Ignition switch on (IG)
    Steering wheel not being turned (without load)
    		Between 4.75 V and 5.25 V
    Ignition switch on (IG)
    Steering wheel being turned to the right with vehicle stopped
    Ignition switch on (IG)
    Steering wheel being turned to the left with vehicle stopped


NG
REPLACE STEERING COLUMN ASSEMBLY (COROLLA_ZRE142 RM0000029SZ02TX.html)
OK

REPLACE POWER STEERING ECU (COROLLA_ZRE142 RM000002XN605BX.html)