Impreza Wagon FWD F4-1820cc 1.8L SOHC (1995)
![background image](/subaru/impreza_wagon_fwd/f4-1820cc_1.8l_sohc/Page-1228001.png)
Hydraulic Unit: Service and Repair
Inspection
CHECKING HYDRAULIC UNIT
1) Check connected and fixed condition of connector.
2) Open hydraulic unit relay box and check for discontinuity or short circuits.
CHECKING THE HYDRAULIC UNIT OPERATION BY PRESSURE GAUGE
1) Remove the FL and FR pipes from the hydraulic unit
2) Connect a pressure gauge to the end of the removed FL and FR pipes.
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.
3) Bleed air from the pressure gauges.
4) Perform sequence control.