Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b28a1 eyesight communication(ecm)

Subaru Legacy BN/BS (2015-2019) Service Manual / Eyesight (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / 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 EyeSight (Ver. 2) type vehicle is installed to the EyeSight (Ver. 3) type vehicle, etc.)

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

TROUBLE SYMPTOM:

• All functions of EyeSight system do not operate.

• EyeSight warning light illuminates.

STEP	CHECK	YES	NO
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)	Replace the ECM. Engine Control Module (ECM) > REMOVAL 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)	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)
4.CHECK ECM. Perform the diagnosis for the engine. Basic Diagnostic Procedure > PROCEDURE 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)
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)	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)
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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Other materials:

Removal
CAUTION:Always use new MT gear select cable if the cable is removed from selector lever COMPL of transmission side.1. Disconnect the ground terminal from battery sensor. NOTE2. Remove the air intake duct. Air Intake Duct > REMOVAL3. Remove the V-belt covers.4. Remove the clip (A) from the air inta ...