DTC B2603: EPB Control

DTC detecting condition: 

Detection of EPB abnormal signal continued for a certain period of time (2100 ms) or more

Trouble symptom: 

Seat operation is possible with manual operation, but not with memory function.

(Memory registration is possible.)

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Read the DTC of [Power Seat Memory] using the Subaru Select Monitor. Ref. to POWER SEAT MEMORY (DIAGNOSTICS)>Diagnostic Trouble Code (DTC) .

   Is DTC B2603 displayed? (Current malfunction)

   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 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 DTC  .

   Perform the inspection for LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE .

   Is the check result OK?

   Yes  :

   Go to  3.

   No  :

   Perform the inspection according to the diagnosis for LAN system.

3. CHECK BODY INTEGRATED UNIT  .
   1. Turn the ignition switch to OFF.
   2. Replace with a power seat control module functioning properly. Ref. to SEATS>POWER SEAT SYSTEM .
   3. Turn the ignition switch to ON.
   4. Read the DTC of [Power Seat Memory] using the Subaru Select Monitor. Ref. to POWER SEAT MEMORY (DIAGNOSTICS)>Diagnostic Trouble Code (DTC) .

   Is DTC B2603 displayed? (Current malfunction)

   Yes  :

   Replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .

   No  :

   There was an abnormality in power seat control module.