DTC B2257: Meter Communication Open

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

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.).

CAUTION:

Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to COCKPIT CONTROL (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION

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

No : 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.
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.
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.
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. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY

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