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Home >> Subaru >> 2001 >> Outback Base, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Braking System >> ABS Control Module and Hydraulic Control Unit (ABSCM&H/U) >> Inspection >> Checking The Hydraulic Unit Abs Operation With Brake Tester

Checking The Hydraulic Unit Abs Operation With Brake Tester

  1. In the case of AWD AT vehicles, install a spare fuse with the FWD connector in the main fuse box to simulate FWD vehicles.
    Fig 1: Installing Spare Fuse With The FWD Connector
    G02088473
  2. Prepare for operating ABS sequence control. See ABS Sequence Control  .

  3. Set the front wheels or rear wheels on the brake tester and set the select lever's position at "neutral".
    Fig 2: Setting Front Wheels On The Brake Tester
    G02088474
    Fig 3: Setting Rear Wheels On The Brake Tester
    G02088475
  4. Operate the brake tester.
  5. Perform ABS sequence control. See ABS Sequence Control  .
  6. Hydraulic unit begins to work; and check the following working sequence.
    1. The FL wheel performs decompression, holding, and compression in sequence, and subsequently the FR wheel repeats the cycle.
    2. The RR wheel performs decompression, holding, and compression in sequence, and subsequently the RL wheel repeats the cycle.
  7. Read values indicated on the brake tester and check if the fluctuation of values, when decompressed and compressed, meet the standard values.
    Fig 4: Decompressed & Compressed Chart
    G02088476
  8. After checking, also check if any irregular brake pedal tightness is felt.
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