Subaru Legacy BN/BS (2015-2019) Service Manual: Inspection

Subaru Legacy BN/BS (2015-2019) Service Manual / Auto headlight beam leveler system (diagnostics) / Subaru select monitor / Inspection

1. COMMUNICATION FOR INITIALIZING IMPOSSIBLE

Communication error with auto headlight beam leveler CM

DETECTING CONDITION:

• Defective harness connector

• Power supply circuit malfunction

• Defective auto headlight beam leveler CM

• Defective CAN communication circuit

• Defective Subaru Select Monitor

TROUBLE SYMPTOM:

Communication is impossible between auto headlight beam leveler CM and Subaru Select Monitor.

CAUTION:

Initialization is required after replacing the auto headlight beam leveler CM.

WIRING DIAGRAM:

NOTE:

For the coupling connector, refer to “WIRING SYSTEM”.

Headlight beam leveler system Headlight Beam Leveler System > WIRING DIAGRAM

STEP	CHECK	YES	NO
1.CHECK OTHER COMMUNICATION. Communicate with the system other than the auto headlight beam leveler CM using the Subaru Select Monitor.	Is the communication to other control module possible-	Subaru Select Monitor > INSPECTION	Perform the “Communication for Initializing Impossible” of LAN system. Subaru Select Monitor > COMMUNICATION FOR INITIALIZING IMPOSSIBLE
2.CHECK LAN SYSTEM. Inspect LAN system. Basic Diagnostic Procedure > PROCEDURE	Is there any fault-	Perform the inspection according to the diagnosis for LAN system.	Subaru Select Monitor > INSPECTION
3.CHECK FOR POOR CONTACT. 1) Turn the ignition switch to OFF. 2) Disconnect the auto headlight beam leveler CM connector. 3) Connect the disconnected connectors. 4) Communicate with the auto headlight beam leveler CM using the Subaru Select Monitor.	Is communication possible-	It is possible that temporary poor communication occurs.	Replace the auto headlight beam leveler CM. Auto Headlight Beam Leveler Control Module

Operation

• For operation procedures, refer to “Application help”.• If the auto headlight beam leveler CM can not communicate with Subaru Select Monitor, perform “COMMUNICATION FOR ...

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NOTE:Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. Basic Diagnostic Procedure1. OUTLINE OF DIAGNOSIS (ENGINE TYPE FB)• Detect malfunction of CAN communication.• Judge as NG when CAN communication failure has occurred.2. EXECUTION CONDITION (ENGINE TYPE FB)Sec ...