LAN SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC U1327 CAN-LS G/W NO-RECEIVE DATA

DTC DETECTING CONDITION:

Not received data from gateway CM.

TROUBLE SYMPTOM:

• Keyless access function does not operate.

• Current data of Subaru Select Monitor cannot be displayed occasionally.

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK DTC.

Read the all DTC using the Subaru Select Monitor.

Are DTC U1300 and U1302 detected?

Perform the diagnosis according to DTC.

2.CHECK BODY INTEGRATED UNIT.

Read the DTC of body integrated unit using Subaru Select Monitor.

Is B1327 current malfunction?

3.CHECK DTC.

1) Turn the ignition to OFF.

2) Disconnect the connector that connected to low speed CAN.

3) Connect the disconnected connectors.

4) Turn the ignition switch to ON.

5) Read the DTC of body integrated unit using Subaru Select Monitor.

Is B1327 current malfunction?

4.CHECK HARNESS.

1) Turn the ignition to OFF.

2) Disconnect the body integrated unit connector.

3) Using the tester, measure the resistance between terminals.

Connector & terminal

(i84) No. 1 — (i10) No. 27 (combination meter):
(i84) No. 9 — (i10) No. 26 (combination meter):
(i84) No. 1 — (i88) No. 20 (A/C):
(i84) No. 9 — (i88) No. 19 (A/C):
(i84) No. 1 — (i50) No. 18 (navigation):
(i84) No. 9 — (i50) No. 6 (navigation):
(i84) No. 1 — (i85) No. 12 (audio):
(i84) No. 9 — (i85) No. 11 (audio):
(i84) No. 1 — (B419) No. 5 (gateway CM):
(i84) No. 9 — (B419) No. 4 (gateway CM):

Is the resistance less than 10 Ω?

Repair or replace the harness.

5.CHECK GATEWAY CM.

1) Turn the ignition to OFF.

2) Replace with gateway CM working properly.

3) Turn the ignition switch to ON.

4) Read the DTC of body integrated unit using Subaru Select Monitor.

Is U1327 a current malfunction?

Replace the body integrated unit.

6.CHECK HARNESS.

1) Shake the harness of each part.

2) Turn the ignition switch to ON.

3) Read the DTC of body integrated unit using Subaru Select Monitor.

Is U1327 a current malfunction?

Repair or replace the poor contact portion of harness.

7.CHECK CONNECTOR.

1) Turn the ignition to OFF.

2) Disconnect the connector that is connected to low speed CAN circuit.

3) Check each connector terminal.

Is there poor contact of connector?

Repair or replace the connector.

Temporary poor contact occurs.