DTC B28A4: Eyesight Communication (EPS)

Detected when the power steering control module (Electric Power Steering Control Module) detects the malfunction of stereo camera.

DTC detecting condition: 

• Defective CAN system
• Defective EPS Control Module
• Defective stereo camera

Trouble symptom: 

• All functions of EyeSight system do not operate.
• EyeSight warning light illuminates.
  CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to EYESIGHT (DIAGNOSTICS) (EXCEPT FOR HEV)>GENERAL DESCRIPTION>CAUTION .

1. CHECK LAN SYSTEM  .

   Perform the diagnosis for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS) (EXCEPT FOR HEV)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

   Is the check result OK?

   Yes  : Go to  2.

   No  : Perform the diagnosis for LAN system.

2. CHECK EPS CONTROL MODULE  .

   Perform the diagnosis for the power steering system. Ref. to POWER STEERING (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

   Is the check result OK?

   Yes  : Go to  3.

   No  : Perform the diagnosis for the power steering system.

3. CHECK CONNECTOR  .

   Check the EPS Control Module connector and the stereo camera connector.

   Is the check result OK?

   Yes  : Go to  4.

   No  : Repair or replace the connector.

4. CHECK STEREO CAMERA  .
   1. Turn the ignition switch to ON.
   2. Read the DTC of [EyeSight] using the Subaru Select Monitor. Ref. to EYESIGHT (DIAGNOSTICS) (EXCEPT FOR HEV)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC other than DTC B28A4 displayed?

   Yes  : Perform the diagnosis for DTC other than DTC B28A4.

   No  : Go to  5.

5. CHECK STEREO CAMERA  .
   1. Using the Subaru Select Monitor, perform the clear memory of [EyeSight]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
   2. Read the DTC of [EyeSight] using the Subaru Select Monitor. Ref. to EYESIGHT (DIAGNOSTICS) (EXCEPT FOR HEV)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B28A4 displayed?

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

   No  : Even if DTC is displayed, the circuit has returned to a normal condition at this time.

   Reproduce the failure, and then perform the diagnosis again.

   NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.