DTC B1509: Cockpit Control Signal Input

DTC detecting condition: 

Abnormal LVDS reception data is detected.

Trouble symptom: 

• The combination meter LCD cannot be displayed.
• Vehicle setting cannot be customized partially.

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 (Ad4) and the combination meter connector (Ad16).

   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>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