DTC B1014: Acc Power

DTC detecting condition :

Voltage failure caused by poor contact of ACC power supply circuit

Trouble symptom :

Interior light may not operate at ACC position.

Failure detection pattern :

Detection by a single system (Primary Failure)

Wiring diagram :

DC power supply circuit Ref. to WIRING SYSTEM>POWER SUPPLY CIRCUIT>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to BODY CONTROL (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .

CHECK DTC .
1. Turn the ignition switch to ON.
2. Read the DTC of [Body Control] using the Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B1014 displayed? (Current code)

Yes : GO TO 2.

No : GO TO 6.
CHECK DTC .
1. Turn the ignition switch to OFF.
2. Disconnect the connector from body integrated unit.
3. Connect the disconnected connectors.
4. Wait approx. 2 minutes.
5. Turn the ignition switch to ON.
6. Read the DTC of [Body Control] using the Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B1014 displayed? (Current code)

Yes : GO TO 3.

No : GO TO 6.
CHECK FUSE .
1. Turn the ignition switch to OFF.
2. Check the fuse. Ref. to WIRING SYSTEM>POWER SUPPLY CIRCUIT>WIRING DIAGRAM .
Is the check result OK?

Yes : GO TO 4.

No : Replace the defective fuse.
CHECK HARNESS .
1. Disconnect the connector from F/B.
2. Using a tester, measure the voltage between the battery and F/B connector.
  Connector & terminal
  
  (B7) No. 2 (+) - Chassis ground (-) :
Is the voltage 8.5 - 16.5 V?

Yes : GO TO 5.

No : Repair the harness between F/B and M/B.
CHECK RELAY .
Perform individual inspection of the accessory 1 relay. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>RELAY AND FUSE>INSPECTION .

Is the check result OK?

Yes : Replace the body integrated unit. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>BODY INTEGRATED UNIT .

No : Replace the relay. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>RELAY AND FUSE .
CHECK CONNECTOR .
1. Turn the ignition switch to OFF.
2. Disconnect the connector from body integrated unit.
Is the check result OK?

Yes : Repair or replace the poor contact of connector.

No : 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.