DTC B2257: Meter Communication Open

DTC detecting condition  :

Detected when LVDS communication with combination meter is not possible.

Trouble symptom  :

• Meter LCD cannot be displayed.
• Vehicle setting cannot be customized partially (EyeSight, Reverse Automatic Braking, Auto Start Stop system, etc.).

Failure detection pattern  :

• "Primary" (high-priority diagnosis)

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
   3. Turn the ignition switch OFF → ON.
   4. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B2257 or B2258 displayed? (Current code)

   Yes  : GO TO  2.

   Yes  : Even if DTC is displayed, the circuit has returned to a normal condition at this time.

   Reproduce the failure, and then perform the diagnosis again.

   NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
2. CHECK CONNECTOR AND CABLE CONNECTION  .
   1. Turn the ignition switch to OFF.
   2. Check that the cockpit control module and combination meter connector are securely connected.

   Is the check result OK?

   Yes  : GO TO  3.

   No  : Connect the connector.

3. CHECK CONNECTOR AND CABLE  .

   Visually check the connector, terminal or cable body.

   Is the check result OK?

   Yes  : GO TO  4.

   No  : Replace the cable.

4. CHECK COMBINATION METER  .

   Perform the inspection according to the diagnosis for combination meter. Ref. to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

   Is the check result OK?

   Yes  : Replace the cockpit control module. HE) Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY .

   No  : Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER .