DTC C2511: Torque Sensor Main

DTC DETECTING CONDITION: 

When torque sensor main output voltage failure is detected after the ignition switch is ON.

TROUBLE SYMPTOM: 

• The steering wheel operation feels heavy.
• STEERING warning light illuminates.

WIRING DIAGRAM: 

Electric power steering system Ref. to WIRING SYSTEM>ELECTRIC POWER STEERING SYSTEM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK TORQUE SENSOR SIGNAL  .
   1. Display the current data of the power steering control module using the Subaru Select Monitor.
   2. Check the voltage of «Torque sensor main output», «Torque sensor sub output» and «Torque sensor power supply voltage».

   Are the voltage of «Torque sensor main output» and «Torque sensor sub output» 2.5-0.3 V?

   Is the voltage of «Torque sensor power supply voltage» 5-0.3 V?

   Yes: Check for poor contact of the connector, and check the conditions again. If the condition recur, go to the next step. Go to  2.

   If it does not recur, complete the inspection.

   No: Go to  2.

2. CHECK HARNESS  .
   1. Turn the ignition switch to OFF.
   2. Remove the cradle. Ref. to FRONT SUSPENSION>CRADLE .
   3. Disconnect the connectors (B450, B451).
   4. Using a tester and special tool harness, check the resistance between harness terminals.

      Connector & terminal

      (B451) No. 1 - (B450) No. 6:

      (B451) No. 2 - (B450) No. 7:

      (B451) No. 3 - (B450) No. 2:

      (B451) No. 4 - (B450) No. 1:

   Is the resistance less than 10 Ω?

   Yes: Replace the steering gearbox. Ref. to POWER ASSISTED SYSTEM (POWER STEERING)>ELECTRIC POWER STEERING GEARBOX .

   No: Repair or replace the harness.