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

DTC U1212 CAN-HS TCM DATA ABNORMAL

DTC DETECTING CONDITION:

Malfunction of TCM itself or, defective data from TCM.

TROUBLE SYMPTOM:

SPORT indicator light blinks.

WIRING DIAGRAM:

• VDC model:

• ABS model

STEPCHECKYESNO

1.CHECK DTC.

Using the Subaru Select Monitor, read all DTCs.

Are there DTC U1201 or U1202?

Perform the diagnosis according to DTC.

2.CHECK DTC.

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

Is U1212 a current malfunction?

3.CHECK DTC.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from TCM.

3) Connect the disconnected connectors.

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

Is U1212 a current malfunction?

Replace the TCM.

4.CHECK HARNESS.

1) Turn the ignition switch to OFF.

2) Shake the harness used for CAN communication circuit.

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

Is U1212 a current malfunction?

Repair or replace the harness.

5.CHECK CONNECTOR.

1) Turn the ignition switch to OFF.

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

Is there poor contact in connector terminal?

Repair the connector terminal, or replace harness.

Temporary poor contact occurs.