Honda Civic manuals

Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc u0128 lost communication with park brake control module

DTC DETECTING CONDITION:

No data is received from VDC CM.

TROUBLE SYMPTOM:

VDC CM does not operate normally.

STEPCHECKYESNO

1.CHECK PERFORMING OF BASIC DIAGNOSTIC PROCEDURE.

Was the basic diagnostic procedure performed up to STEP 8-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE

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 U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE

3.CHECK DTC.

Check the displayed DTC.

Is U0128 a current malfunction-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE

4.CHECK DTC.

1) Check CAN communication circuit. CAN Communication Circuit Check

2) Read the DTC using Subaru Select Monitor.

Is U0128 a current malfunction-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE

5.CHECK DTC.

Using the Subaru Select Monitor, read DTC of all the systems.

Is the electronic parking data no-receive detected in several modules-

Replace the VDC CM. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE

6.REPLACE MODULE.

1) Replace the VDC CM. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)

2) Read the DTC using Subaru Select Monitor.

Is U0128 a current malfunction-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE

System is normal.

7.CHECK MODULE.

1) Reinstall the VDC CM.

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

3) Read the DTC using Subaru Select Monitor.

Is U0128 a current malfunction-

Replace the VDC CM. VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)

System is normal.

8.CHECK HARNESS.

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

2) Read the DTC using Subaru Select Monitor.

Is U0128 a current malfunction-

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

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC U0128 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE

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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Legacy
NOTE It may be difficult to replace the bulbs. We recommend that you have the bulbs replaced by your SUBARU dealer if necessary. Open the trunk. Remove the trunk trim lining by removing the clips indicated in the illustration. Turn the bulb socket counterclockwise and r ...

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