Check Hydraulic Unit VDC Operation With Brake Tester

Set wheels other than the one to measure free rollers.
Prepare to operate the VDC sequence control. <Ref. to VDC SEQUENCE CONTROL . >
Set the front wheels or rear wheels on the brake tester and set the select lever position to the "N" range.

Fig 1: Setting Front Wheels On Brake Tester
Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Setting Rear Wheels On Brake Tester
Courtesy of SUBARU OF AMERICA, INC.
Operate the brake tester.
Perform VDC sequence control.
<Ref. to VDC SEQUENCE CONTROL . >
When the hydraulic unit begins to work, check the following work sequence.
1. The FL wheel performs compression, hold and decompression in sequence, and subsequently the FR wheel repeats the cycle.
2. The RR wheel performs compression, hold and decompression in sequence, and subsequently the RL wheel repeats the cycle.

Read values indicated on the brake tester and check if the fluctuation of the values between decompression and compression meets specification.

DECOMPRESSION AND COMPRESSION SPECIFICATIONS

	Front wheel	Rear wheel
When pressurized	2,000 N (203 kgf, 447 lb) or more	2,000 N (203 kgf, 447 lb) or more
When depressurized	500 N (51 kgf, 112 lb) or less	500 N (51 kgf, 112 lb) or less

After the inspection, depress the brake pedal and check that it is not abnormally hard, and tightness is normal.