Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b2603 epb control

Subaru Legacy BN/BS (2015-2019) Service Manual / Power seat memory system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / 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.)

STEP	CHECK	YES	NO
1.CHECK DTC. 1) Turn the ignition switch to ON. 2) Read the DTC of the power seat control module using the Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)	Is DTC B2603 displayed- (Current malfunction)	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2603 EPB CONTROL	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. Basic Diagnostic Procedure > PROCEDURE	Is there any fault-	Perform the inspection according to the diagnosis for LAN system.	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2603 EPB CONTROL
3.CHECK BODY INTEGRATED UNIT. 1) Turn the ignition switch to OFF. 2) Replace with a power seat control module working properly. Power Seat System > REMOVAL 3) Turn the ignition switch to ON. 4) Read the DTC of the power seat control module using the Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)	Is DTC B2603 displayed- (Current malfunction)	Replace the body integrated unit. Body Integrated Unit	There was an abnormality in power seat control module.

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Other materials:

Wiring diagram
1. MODEL WITHOUT PUSH BUTTON IGNITION SWITCH(1)Ignition switch(5)Key warning switch(9)TCM (shift range information)(2)Accessory 1 relay(6)Battery(10)Key lock solenoid(3)IG2 relay(7)Body integrated unit(11)Shift lock solenoid(4)Stop light switch(8)VDC CM (vehicle speed information)(12)“P” ...