Hydraulic System Pressure Test

NOTE: Ensure power steering belt tension and tire pressure are correct before performing hydraulic system pressure test.

Disconnect high pressure hose at power steering pump. Install Pressure Gauge (J-26357 ) between power steering pump and steering gear. See Fig 1. Open valve and bleed air from system. See HYDRAULIC SYSTEM BLEEDING under LUBRICATION. Check fluid level.

Fig 1: Installing Pressure Gauge
Courtesy of NISSAN MOTOR CO., U.S.A.

NOTE: DO NOT hold steering wheel at or near lock position for more than 15 seconds.
Start engine, and allow reservoir fluid temperature to reach 140-176°F (60-80°C). Set engine speed to 1000 RPM. Check pressure quickly with wheel turned to full-lock position on left and right sides.
Compare pressure reading with HYDRAULIC SYSTEM PRESSURE SPECIFICATIONS . If pressure is lower than specification, slowly close shutoff valve and note pressure. DO NOT close shutoff valve for more than 15 seconds.
If pressure now reads within specification, power steering pump is okay and steering gear is defective. If pressure reading is still not within specification, power steering pump is defective. If pressure reading is higher than specification, check power steering pump control valve. Remove pressure gauge and bleed system.

HYDRAULIC SYSTEM PRESSURE SPECIFICATIONS

Application	psi (kg/cm² )
Sentra	1109-1194 (78-84)