Subaru Crosstrek Service Manual: Dtc b28a1 eyesight communication(ecm)

Detected when the engine control module (ECM) detects the malfunction of stereo camera, or when the stereo camera or ECM is assembled incorrectly.

DTC DETECTING CONDITION:

• Defective CAN system

• Defective engine control module (ECM)

• Defective stereo camera

• Incorrect assembly of stereo camera (when the stereo camera designed for A-type vehicle is installed to the B-type vehicle, etc.)

• Incorrect assembly of ECM (when the ECM designed for another model is installed, etc.)

• All functions of EyeSight system do not operate.

• EyeSight warning light illuminates.

1.CHECK ECM.

Check the part number of the ECM.

Is the ECM genuine?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B28A1 EyeSight COMMUNICATION(ECM)">Go to Step 2.

Replace the ECM. Engine Control Module (ECM) > REMOVAL">

2.CHECK STEREO CAMERA.

1) Remove the camera cover.

2) Check the part number of the stereo camera.

Is the stereo camera genuine?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B28A1 EyeSight COMMUNICATION(ECM)">Go to Step 3.

Replace the stereo camera. Stereo Camera > REMOVAL">

3.CHECK LAN SYSTEM.

Perform the diagnosis for LAN system. Basic Diagnostic Procedure > PROCEDURE">

Is DTC displayed?

Perform the diagnosis according to DTC.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B28A1 EyeSight COMMUNICATION(ECM)">Go to Step 4.

4.CHECK ECM.

Perform the diagnosis for the engine. Basic Diagnostic Procedure > PROCEDURE">

Is DTC displayed?

Perform the diagnosis according to DTC.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B28A1 EyeSight COMMUNICATION(ECM)">Go to Step 5.

5.CHECK CONNECTOR.

Check the ECM connector and the stereo camera connector.

Is the connector OK?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B28A1 EyeSight COMMUNICATION(ECM)">Go to Step 6.

Repair or replace the connector.

6.CHECK STEREO CAMERA.

Read the DTC. Diagnostic Code(s) Display">

Is another DTC displayed?

Perform the diagnosis according to DTC.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B28A1 EyeSight COMMUNICATION(ECM)">Go to Step 7.

7.CHECK STEREO CAMERA.

1) Clear the memory. Clear Memory Mode">

2) Read the DTC. Diagnostic Code(s) Display">

Is the same DTC displayed?

Replace the stereo camera. Stereo Camera > REMOVAL">

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, or temporary open or short circuit of harness may be the cause.

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