C1512

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for 2AZ-FE): C1511-C1514, C1517; Torque Sensor Circuit Malfunction; 2013 MY Corolla [07/2012 -]
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.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
If the steering column assembly or power steering ECU has been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration Programming and Relearning.

PROCEDURE

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

(a) 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 -- Continue to next step.

2. CHECK POWER STEERING ECU (TRQV VOLTAGE)

(a) Turn the ignition switch on (IG).

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

Standard Voltage:

NG -- REPLACE POWER STEERING ECU Removal
OK -- Continue to next step.

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

(a) Turn the ignition switch on (IG).

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

Standard Voltage:

NG -- REPLACE STEERING COLUMN ASSEMBLY Removal

OK -- REPLACE POWER STEERING ECU Removal