DTC B1509: Cockpit Control Signal Input

DTC detecting condition: 

LVDS communication with the cockpit Control Module is impossible.

Trouble symptom: 

Meter LCD cannot be displayed.

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

   Is DTC B1509 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.
2. CHECK CONNECTOR  .

   Check the harness between the cockpit Control Module connector and the combination meter.

   Is the check result OK?

   Yes:  Go to  3

   No:  Repair the harness or replace the components.

3. CHECK COCKPIT Control Module 

   Perform the inspection according to the diagnosis for the cockpit Control Module. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE

   Is the check result OK?

   Yes:  Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER

   No:  Replace the cockpit Control Module. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY