Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b2a03 gps antenna circuit

Subaru Legacy BN/BS (2015-2019) Service Manual / Telematics system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc b2a03 gps antenna circuit

DIAGNOSIS START CONDITION:

When ignition switch is ON.

DTC DETECTING CONDITION:

Any of the followings continues for 5 seconds or more.

• GPS antenna impedance is more than 1 M-. (Detached antenna, etc.)

• GPS antenna impedance is less than 1 k-. (Short-circuited antenna, etc.)

TROUBLE SYMPTOM:

• Telematics function cannot be used.

• 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 B2A01 displayed- (Current malfunction)	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2A03 GPS ANTENNA CIRCUIT	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 GPS ANTENNA. Visually check the GPS antenna. GPS Antenna	Is the GPS antenna OK-	Replace the DCM. Data Communication Module	Replace the GPS antenna. GPS Antenna

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Other materials:

Inspection
1. CHECK FUSE1. Remove the fuse and inspect visually.2. If the fuse is blown out, replace the fuse.NOTE:If the fuse is blown again, check the system wiring harness.2. CHECK RELAY1. Measure the resistance between relay terminals.Terminal No.Inspection conditionsStandardCircuit1 — 2Always1 M- or mor ...