POWER ASSISTED SYSTEM (POWER STEERING) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC 11 TORQUE SENSOR FAILURE 1 (MAIN)

TROUBLE SYMPTOM:

• The steering wheel operation feels heavy.

• Steering warning light illuminates.

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK TORQUE SENSOR SIGNAL.

1) Display the current data of the power steering control module using the Subaru Select Monitor.

2) Check the voltages of the torque sensor main, sub, torque sensor control values.

Are the torque sensor main, torque sensor sub, and torque sensor control voltages 2.5±0.1 V?

Confirm the symptom again and perform the check.

2.CHECK TORQUE SENSOR.

1) Turn the ignition switch to OFF.

2) Disconnect the power steering control module connector (B450).

3) Using a tester and test harness, check the internal resistance of the torque sensor.

4) Check for whether the resistance between the terminals change or not when the steering is turned to the left and right.

Connector & terminal

(B450) No. 4 — No. 9:

(B450) No. 5 — No. 9:

(B450) No. 4 — No. 10:

(B450) No. 5 — No. 10:

Did resistance change in all measurement locations?

Replace the power steering control module.

3.CHECK HARNESS.

1) Turn the ignition switch to OFF.

2) Disconnect the connector (B451).

3) Using a tester and test harness, check the internal resistance of the harness terminals.

Connector & terminal

(B450) No. 4 — (B451) No. 2:

(B450) No. 5 — (B451) No. 1:

(B450) No. 9 — (B451) No. 5:

(B450) No. 10 — (B451) No. 3:

Is the resistance less than 10 Ω?

Repair or replace the harness.

4.CHECK TORQUE SENSOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector (B451).

3) Using a tester and test harness, check the internal resistance of the torque sensor.

4) Check for whether the resistance between the terminals change or not when the steering is turned to the left and right.

Connector & terminal

(PS3) No. 2 — No. 5:

(PS3) No. 1 — No. 5:

(PS3) No. 2 — No. 3:

(PS3) No. 1 — No. 3:

Did resistance change in all measurement locations?

Replace the power steering control module.

Replace the steering gearbox.