Working Pressure Measurement

Attach ST1, ST2 and ST3 to the vehicle body in the same way as for regular pressure measurement.
Preparation tool:

ST1: PRESSURE GAUGE (925711000)

ST2: ADAPTER HOSE B (34099AC020)

ST3: ADAPTER HOSE A (34099AC010)

Fig 1: Measuring Valve Working Pressure
Courtesy of SUBARU OF AMERICA, INC.
Open the valve.
Measure the working pressure of control valve by turning steering wheel from stop to stop.
Service limit:

H4 model:

8, 300 - 9, 000 kPa (85 - 92 kgf/cm ² , 1, 203 - 1, 305 psi)

H6 model:

8, 900 - 9, 600 kPa (91 - 98 kgf/cm ² , 1, 290 - 1, 392 psi)
If it is out of specification, measure the steering effort. < Refer to MEASUREMENT OF STEERING EFFORT , INSPECTION, General Diagnostic Table. >
If the steering wheel effort is not within specification, replace the control valve itself or control valve and pinion as a single unit, using new parts.