Hydraulic Pressure Testing

Disconnect pressure line at line joint. Attach pressure gauge with gauge side connected to vane pump. Attach valve side of gauge to rack and pinion side. Bleed air from system. Check fluid level. With engine at idle and with valve closed, check fluid pressure. See HYDRAULIC PRESSURE .

HYDRAULIC PRESSURE

Application		psi (kg/cm² )
Camry
4-Cylinder		924 (65)
V6		1067 (75)
Celica		966 (70)
Corolla (All)		924 (65)
Cressida & Supra		1067 (75)
Tercel		811 (57)

NOTE: Do not keep pressure gauge valve closed for more than 10 seconds. Fluid testing temperature should be 176°F (80°C).

Open valve fully. Note pressure with engine at idle, and again at 3000 RPM. Pressure difference should be less than 71 psi (5 kg/cm² ). If more, check flow control valve.
With steering wheel at lock position and pressure valve open, recheck pressure. See HYDRAULIC PRESSURE . With vehicle on flat surface, turn steering wheel to center position.

On all models except Supra and Celica, center steering wheel. With engine idling, using an INCH lbs. torque wrench, measure steering turning force at steering wheel nut. Turning force should not exceed specifications in STEERING WHEEL NUT TURNING FORCE . If turning force exceeds specification, replace power steering pump.

STEERING WHEEL NUT TURNING FORCE

Application	INCH Lbs. (N.m)
Camry	61 (6.9)
Corolla	51 (5.8)
Cressida & Tercel	69 (7.8)

On Celica, attach spring scale to steering wheel. Steering effort should not exceed 8.8 lbs. (4 kg). If steering effort is high, repair or replace power steering pump.
On Supra, attach spring scale to steering wheel. On models without Progressive Power Steering (PPS), steering effort should not exceed 10.36 lbs. (4.7 kg). On models with PPS, steering effort should not exceed 5.95 lbs. (2.7 kg). If steering effort is high, repair or replace power steering pump.