Subaru Crosstrek Service Manual: Dtc u0156 lost communication with information center "a"

DTC DETECTING CONDITION:

No data is received from MFD.

TROUBLE SYMPTOM:

Display of MFD does not operate properly.

1.CHECK PERFORMING OF BASIC DIAGNOSTIC PROCEDURE.

Was the basic diagnostic procedure performed up to STEP 3?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A"">Go to Step 2.

Perform the basic diagnostic procedure. Basic Diagnostic Procedure">

2.CHECK DTC.

Check the displayed DTC.

Are DTCs other than U*** displayed?

Perform the diagnosis according to DTC.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A"">Go to Step 3.

3.CHECK DTC.

Check the displayed DTC.

Is U0156 a current malfunction?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A"">Go to Step 4.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A"">Go to Step 8.

4.CHECK DTC.

1) Check CAN communication circuit. CAN Communication Circuit Check">

2) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

Is U0156 a current malfunction?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A"">Go to Step 5.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A"">Go to Step 8.

5.CHECK DTC.

Using the Subaru Select Monitor, read DTC of all the systems. Read Diagnostic Trouble Code (DTC)">

Is the data no-receive detected in several modules?

Replace the MFD. Multi-function Display (MFD)">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A"">Go to Step 6.

6.REPLACE MODULE.

1) Replace the MFD. Multi-function Display (MFD)">

2) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

Is U0156 a current malfunction?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A"">Go to Step 7.

System is normal.

7.CHECK MODULE.

1) Reinstall the MFD.

2) Replace the module that the DTC has been detected.

3) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

Is U0156 a current malfunction?

Replace the MFD. Multi-function Display (MFD)">

System is normal.

8.CHECK HARNESS.

1) Shake the harness, and check for poor contact.

2) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

Is U0156 a current malfunction?

Repair the poor contact of harness, or replace the harness.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0156 LOST COMMUNICATION WITH INFORMATION CENTER "A"">Go to Step 9.

9.CHECK CONNECTOR.

Check the connector used for high speed CAN for poor contact.

Is there poor contact of connector?

Repair the connector that has poor contact, or replace harness.

It is possible that temporary poor communication occurs. Delete the DTC.

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