Check Eyesight Steering Switch

Trouble symptom: 

• Cruise control cannot be set. (Cancelled immediately.)
• Cruise control cannot be released.

Wiring diagram: 

EyeSight System Refer to WIRING SYSTEM>EYESIGHT SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK EyeSight STEERING SWITCH CIRCUIT. 
   1. Remove the driver's airbag module. Refer to AIRBAG SYSTEM>DRIVER'S AIRBAG MODULE>REMOVAL .
   2. Disconnect the EyeSight steering switch harness connector.
   3. Turn the ignition switch to ON.
   4. Measure the voltage between harness connector terminal and chassis ground.

      Connector & terminal 

      (ST3) No. 3 (+) - Chassis ground (-):

      (ST3) No. 4 (+) - Chassis ground (-):

   Is the voltage 5 V or more?

   Yes:  Go to  2.

   No:  Check for open/short circuit or poor contact in the harness between EyeSight steering switch and ECM and in the steering roll connector.

2. CHECK EyeSight STEERING SWITCH CIRCUIT. 
   1. Turn the ignition switch to OFF.
   2. Remove the EyeSight steering switch. Refer to CRUISE CONTROL SYSTEM>CRUISE CONTROL COMMAND SWITCH>REMOVAL .
   3. Measure the resistance between harness connector terminal and chassis ground.

   Connector & terminal 

   (ST3) No. 9 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes:  Go to  3.

   No:  Check for open circuit between EyeSight steering switch and chassis ground.

3. CHECK EyeSight STEERING SWITCH. 

   Check EyeSight steering switch. Refer to CRUISE CONTROL SYSTEM>CRUISE CONTROL COMMAND SWITCH>INSPECTION .

   Is the check result OK?

   Yes:  Replace the stereo camera. Refer to EYESIGHT>STEREO CAMERA .

   No:  Replace the EyeSight steering switch. Refer to EYESIGHT STEERING SWITCH .