DTC B28A1: Eyesight Communication (ECM)

DTC detecting condition: 

• When the engine control module (ECM) detects the malfunction of stereo camera.
• Defective CAN system
• Defective engine control module (ECM)
• Defective stereo camera
• Incorrect assembly of stereo camera
• Incorrect assembly of ECM (When the ECM designed for another model is installed, etc.)

Trouble symptom: 

All functions of EyeSight system do not operate.

1. CHECK ECM  .

   Check the part number of the ECM.

   Is the ECM genuine?

   Yes  : Go to  2.

   No  : Replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM)

2. CHECK STEREO CAMERA  .
   1. Remove the camera cover. Ref. to EYESIGHT>STEREO CAMERA
   2. Check the part number of the stereo camera.

   Is the stereo camera genuine?

   Yes  : Go to  3.

   No  : Replace the stereo camera. Ref. to EYESIGHT>STEREO CAMERA

3. CHECK LAN SYSTEM  .

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

   Is the check result OK?

   Yes  : Go to  4.

   No  : Repair or replace the faulty portion according to the inspection result.

4. CHECK ECM  .

   Perform the diagnosis for the engine. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE

   Is the check result OK?

   Yes  : Go to  5.

   No  : Repair or replace the faulty portion according to the inspection result.

5. CHECK CONNECTOR  .

   Check the ECM connector and the stereo camera connector.

   Is the check result OK?

   Yes  : Go to  6.

   No  : Repair or replace the connector.

6. CHECK STEREO CAMERA  .

   Read the DTC of [EyeSight] using the Subaru Select Monitor. Ref. to EYESIGHT (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) 

   Is DTC other than DTC B28A1 displayed? (Current code)

   Yes  : Perform the diagnosis of DTCs other than B28A1. Ref. to EYESIGHT (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) 

   No  : Go to  7.

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

   Is DTC B28A1 displayed? (Current code)

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

   No  : Currently, it is normal. Finish the diagnosis.