Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b2a10 battery voltage high

Subaru Legacy BN/BS (2015-2019) Service Manual / Telematics system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc b2a10 battery voltage high

DIAGNOSIS START CONDITION:

When ignition switch is ON.

DTC DETECTING CONDITION:

DCM battery power supply input of 16 V or more continues for 5 seconds.

TROUBLE SYMPTOM:

RED LED illuminates.

CAUTION:

CommCheck is required after replacing the DCM. Telematics System > OPERATION

STEP	CHECK	YES	NO
1.CHECK DTC. Read the DTC. Diagnostic Code(s) Display	Is DTC B2A10 displayed- (Current malfunction)	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A10 BATTERY VOLTAGE HIGH	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. In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2.CHECK CURRENT DATA. Check «Battery Voltage» in «Current Data Display & Save». Read Current Data	Is «Battery Voltage» OK-	Replace the DCM. Data Communication Module	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A10 BATTERY VOLTAGE HIGH
3.CHECK BATTERY. Check the battery unit. Battery > INSPECTION General Description > SPECIFICATION	Is the battery OK-	Replace the DCM. Data Communication Module	Replace the battery. Battery General Description

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Other materials:

Idle speed inspection
1. Before checking the idle speed, check the following item:(1) Check the air cleaner element is free from clogging, ignition timing is correct, spark plugs are in good condition, and hoses are connected properly.(2) Check the malfunction indicator light does not illuminate.2. Warm up the engine.3. ...