LAN SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC DETECTING CONDITION:
Malfunction occurs such as open or short circuit in wake-up communication line between gateway CM and body integrated unit.
TROUBLE SYMPTOM:
Keyless access system operation may not be normal. (Only model with keyless access)
WIRING DIAGRAM:
1.CHECK DTC.
Connect the Subaru Select Monitor and read all DTCs.
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Are DTCs B2002, B2001 and B2000 displayed?
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Perform the diagnosis according to DTC.
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2.CHECK CURRENT DATA.
Display current data «BD_wake line status» of gateway CM using Subaru Select Monitor.
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3.CHECK CURRENT DATA.
Display the current data «Smart wake-up input» of body integrated unit using Subaru Select Monitor.
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4.CHECK HARNESS.
1) Disconnect the connectors from body integrated unit and gateway CM.
2) Check for continuity between body integrated unit and gateway CM connector using tester.
Connector & terminal
(B281) No. 14 — (B419) No. 15:
(B279) No. 28 — (B419) No. 19:
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Repair or replace the open circuit of harness.
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5.CHECK HARNESS.
Check the continuity between body integrated unit connector and chassis ground using tester.
Connector & terminal
(B281) No. 14 — Chassis ground:
(B279) No. 28 — Chassis ground:
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Repair or replace the short circuit of the harness.
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6.CHECK HARNESS.
1) Connect the gateway CM connector.
2) Check the continuity between body integrated unit connector and chassis ground using tester.
Connector & terminal
(B281) No. 14 — Chassis ground:
(B279) No. 28 — Chassis ground:
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7.CHECK HARNESS.
1) Disconnect the gateway CM connector and connect the body integrated unit connector.
2) Check the continuity between gateway CM connector and chassis ground using tester.
Connector & terminal
(B419) No. 15 — Chassis ground:
(B419) No. 19 — Chassis ground:
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Replace the body integrated unit. 
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