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.
EyeSight steering support function does not operate. (Models with EyeSight)

WIRING DIAGRAM:

Electric power steering system <Ref. to Electric Power Steering System .>

Fig 1: Torque Sensor Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK TORQUE SENSOR SIGNAL. Display the current data of the power steering control module using the Subaru Select Monitor. 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±0.1 V?	Is the voltage of «Torque sensor power supply voltage» 5±0.3 V? Check for poor contact of the connector, and check the conditions again. If the condition recur, go to the next step. Go to step 2 . If it does not recur, complete the inspection.	Go to step 2 .
2 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the connectors (B450, B451). 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?	Go to step 3 .	Repair or replace the harness.
3 CHECK POWER STEERING CONTROL MODULE. Connect the connector (B450) to the power steering control module. Turn the ignition switch to ON. Short the circuit between connector (B451) terminals. Terminals No. 3 - No. 1: No. 3 - No. 2: Using the Subaru Select Monitor, check the voltages of «Torque sensor main output» and «Torque sensor sub output».	Is the voltage of «Torque sensor main output» 2.5±0.3 V, and the voltage of «Torque sensor sub output» 0±0.1 V before the circuit is shorted? Are the voltages of «Torque sensor main output» and «Torque sensor sub output» after you short the circuit 5±0.3 V?	Replace the steering gearbox. <Ref. to Electric Power Steering Gearbox .>	Replace the power steering control module. <Ref. to Power Steering Control Module .>