Impreza 2.5 RS Coupe AWD F4-2.5L SOHC (2001)
Electronic Brake Control Module: Testing and Inspection
INSPECTION
1. Check connected and fixed condition of connector.
2. Check specifications of the mark with ABSCM & H/U.
1. CHECKING THE HYDRAULIC UNIT ABS OPERATION BY PRESSURE GAUGE
1. Lift-up vehicle and remove wheels.
2. Disconnect the air bleeder screws from the FL and FR caliper bodies.
3. Connect two pressure gauges to the FL and FR caliper bodies.
CAUTION:
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Pressure gauges used exclusively for brake fluid must be used.
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Do not employ pressure gauge previously used for transmission since the piston seal is expanded which may lead to malfunction of the brake.
NOTE: Wrap sealing tape around the pressure gauge.
4. Bleed air from the pressure gauges.
5. Perform ABS sequence control.
6. When the hydraulic unit begins to work, and first the FL side performs decompression, holding, and compression, and then the FR side performs
decompression, holding, and compression.
7. Read values indicated on the pressure gauge and check if the fluctuation of the values between decompression and compression meets the standard
values. Also check if any irregular brake pedal tightness is felt.
8. Remove pressure gauges from FL and FR caliper bodies.
9. Remove air bleeder screws from the RL and RR caliper bodies.
10
Connect the air bleeder screws to the FL and FR caliper bodies.
11. Connect two pressure gauges to the RL and RR caliper bodies.
12. Bleed air from the pressure gauges and the FL and FR caliper bodies.
