ABS unit ventilation

Air venting operation has been neglected since the ABS unit block in BC7 had been replaced last year. Remembering the past, my own careless miss had broken an original unit block when brake master cylinder had been replaced as a periodical maintenance. But, disassembling the original one revealed the work had not not been always necessary, because, no degradation was found in cup and sealing rubber parts. Anyway, the venting operation between the brake master cylinder and ABS unit must be checked under the unit operating condition by shortening with additional wires shown in the service manual. To tell the truth, feel I a little soft and fluffy feeling on the brake pedal reaction, one or two pieces of aberrant bubble must be found on the way of work? I must seek for the deserted original ABS parts in the junk box, because some jumping wiring special connector must be prepared for the procedure utilizing a round shape coupler parts. Because no longer activation of ABS system more than 5 second is allowed, some on/off switch must be wired if the procedure is about to do by a single person, this is the requirement for secondary solenoid ventilation.