C1514

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

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
* If the power steering ECU has been replaced with a new one, perform the assist map writing and the torque sensor zero point calibration Programming and Relearning.
* 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 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 (TOQUE SENSOR OUTPUT)

(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 STEERING COLUMN ASSEMBLY (TORQUE SENSOR)

(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