Check Eyesight Steering Switch

Trouble symptom: 

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

Wiring diagram: 

EyeSight system Ref. to WIRING SYSTEM (IMPREZA MODEL)>EYESIGHT SYSTEM>WIRING DIAGRAM . Ref. to WIRING SYSTEM (CROSSTREK MODEL (EXCEPT FOR HEV))>EYESIGHT SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

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

      Connector and 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 stereo camera 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. Ref. to EYESIGHT>SWITCHES AND HARNESS .
   3. Measure the resistance between connector terminal and chassis ground.

      Connector and 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. Ref. to EYESIGHT>SWITCHES AND HARNESS

   Is the check result OK?

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

   No:  Replace the EyeSight steering switch. Ref. to EYESIGHT>SWITCHES AND HARNESS .