DTC C1711: Steering Angle Sensor

DTC detecting condition: 

• A fault is detected if the sensor signal value is not correct.
• A fault is detected if the yaw rate sensor signal/lateral G sensor signal change while the sensor signal of steering angle sensor indicates a constant value.
• A fault is detected if the communication status of steering angle sensor is abnormal.

Trouble symptom: 

• VDC does not operate.
• AVH does not function.
• EyeSight does not operate. (Models with EyeSight)

Wiring diagram: 

Vehicle dynamics control system Ref. to WIRING SYSTEM>VEHICLE DYNAMICS CONTROL SYSTEM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK POWER SUPPLY FOR STEERING ANGLE SENSOR  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector from steering angle sensor.
   3. Turn the ignition switch to ON.
   4. Measure the voltage between steering angle sensor and chassis ground.

      Connector & terminal 

      (i74) No. 4 (+) - Chassis ground (-):

   Is the voltage 10 - 15 V?

   Yes  : Go to  2 .

   No  : Repair the steering angle sensor power supply circuit including the fuse.

2. CHECK GROUND CIRCUIT OF STEERING ANGLE SENSOR (CHECK FOR OPEN CIRCUIT)  .

   Measure the resistance between steering angle sensor and chassis ground.

   Connector & terminal 

   (i74) No. 1 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes  : Go to  3 .

   No  : Repair ground circuit in the steering angle sensor.

3. CHECK STEERING ANGLE SENSOR HARNESS (CHECK FOR OPEN CIRCUIT)  .
   1. Disconnect the connector from the VDCCM&H/U.
   2. Measure the resistance between VDCCM&H/U and steering angel sensor.

      Connector & terminal 

      (i74) No. 2 - (B310) No. 19:

      (i74) No. 3 - (B310) No. 5:

   Is the resistance less than 1 Ω?

   Yes  : Go to  4 .

   No  : Repair the harness between the steering angle sensor and VDCCM&H/U.

4. CHECK GROUND SHORT CIRCUIT OF STEERING ANGLE SENSOR HARNESS  .

   Measure the resistance between steering angle sensor and chassis ground.

   Connector & terminal 

   (i74) No. 2 - Chassis ground:

   (i74) No. 3 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  5 .

   No  : Repair the harness between the steering angle sensor and VDCCM&H/U.

5. CHECK STEERING WHEEL  .
   1. Drive the vehicle on a flat road.
   2. Park the vehicle straight.
   3. Check the steering wheel for deviation from center.

   Is the deviation from the center of steering wheel less than 5°?

   Yes  : Go to  6 .

   No  : Perform the centering adjustment of steering wheel, and perform the VDC sensor midpoint setting mode. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U)>ADJUSTMENT>VDC SENSOR MIDPOINT SETTING MODE .

6. CHECK OUTPUT OF STEERING ANGLE SENSOR USING SUBARU SELECT MONITOR  .
   1. Adjust steering wheel to the center position.
   2. Select the [Data Monitor] using Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DATA MONITOR .
   3. Read Lateral G Sensor, Longitudinal G Sensor, and [Steering Angle Sensor] indicated on the display screen.

   Is the value of [Steering Angle Sensor] -10 - 10°?

   Yes  : Perform the VDC sensor midpoint setting mode. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U)>ADJUSTMENT>VDC SENSOR MIDPOINT SETTING MODE . Go to 7.

   No  : Check the installation of the steering wheel and steering angle sensor.

7. CHECK STEERING ANGLE SENSOR USING SUBARU SELECT MONITOR  .
   1. Turn the ignition switch to OFF.
   2. Connect all connectors.
   3. Using the Subaru Select Monitor, perform the clear memory. Ref. to COMMON(DIAG)>CLEAR MEMORY .
   4. Execute the inspection mode. Ref. to BRAKE CONTROL (DIAGNOSTICS)>INSPECTION MODE .
   5. Read the DTC using Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is the same DTC displayed?

   Yes  : Replace the steering angle sensor. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>STEERING ANGLE SENSOR .

   No  : Go to  8 .

8. CHECK DETECTION OF OTHER DTCS FOR VDC  .

   Read the DTC using Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is any other DTC displayed?

   Yes  : Perform the diagnosis according to DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

   No  : Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.