Hydraulic System Pressure Test

With engine off, disconnect pressure hose from pump. Install Power Steering Tester (J-5176-D ) between power steering pump and steering unit. See Fig 1 .

Fig 1: Testing Power Steering System Fluid Pressure
Courtesy of SUZUKI OF AMERICA CORP.
Bleed system by holding gauge beneath fluid reservoir with shutoff valve open. With engine idling, check fluid level in reservoir. Refill reservoir if necessary.
If steering system still malfunctions, start engine. Turn steering wheel lock-to-lock several times until fluid temperature is 122-140° F (50-60° C).
With steering wheel straight ahead, check pressure gauge. If gauge reads more than 142 psi (10.0 kg/cm² ), check flow control valve, pressure hoses and pipes for restrictions.
Slowly close pressure gauge valve while watching gauge. If fluid pressure is more than 1137 psi (80 kg/cm² ) or less than 853 psi(60 kg/cm² ), inspect relief pressure valve, pressure hose and pipes for restrictions. Open pressure gauge valve.
CAUTION: DO NOT leave shutoff valve closed longer than 15 seconds or pump may be damaged.
Hold engine speed at 1500 RPM and check pressure gauge reading. If pressure reading is less than 853 psi (60 kg/cm² ), inspect spool valve for restrictions.