Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b1014 acc power

Subaru Legacy BN/BS (2015-2019) Service Manual / Body control system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc b1014 acc power

DTC DETECTING CONDITION:

Voltage failure caused by poor contact of ACC power supply circuit

ACC voltage was outside the range of 8.3 — 16.7 V, when ACC power supply was ON.

Time Needed for Diagnosis:

40 s or more

TROUBLE SYMPTOM:

DRL may not illuminate.

WIRING DIAGRAM:

Shift lock control system Shift Lock Control System > WIRING DIAGRAM

STEP	CHECK	YES	NO
1.CHECK DTC. Read the DTC of body integrated unit using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)	Is DTC B1014 displayed- (Current malfunction)	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1014 ACC POWER	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1014 ACC POWER
2.CHECK DTC. 1) Turn the ignition switch to OFF. 2) Disconnect and then connect the body integrated unit connector. 3) Wait approx. 2 minutes. 4) Turn the ignition switch to ON. 5) Read the DTC of body integrated unit using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)	Is DTC B1014 displayed- (Current malfunction)	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1014 ACC POWER	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1014 ACC POWER
3.CHECK FUSE. 1) Turn the ignition switch to OFF. 2) Check the fuse.	Is the fuse OK-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1014 ACC POWER	Replace the defective fuse.
4.CHECK HARNESS. 1) Turn the ignition switch to ACC. 2) Using the tester, measure the voltage between terminals. Connector & terminal F/B fuse No. 9 (+) — Chassis ground (−):	Is the voltage 8.5 — 16.5 V-	Replace the body integrated unit. Body Integrated Unit	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1014 ACC POWER
5.CHECK ACCESSORY 1 RELAY. Perform individual inspection of the accessory 1 relay. Relay and Fuse	Is there any fault-	Replace the relay.	Repair the harness between F/B and M/B.
6.CHECK CONNECTOR. 1) Turn the ignition switch to OFF. 2) Disconnect the body integrated unit connector.	Is there poor contact of connector-	Repair or replace the poor contact of connector.	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, temporary open or short circuit of harness may be the cause.

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