Initial Inspection and Diagnostic Overview

Checking Hydraulic System





Before starting, check belt tension, driving pulley and tire pressure.
1. Set Tool. Open shut-off valve. Then bleed air.
2. Run engine at idle speed or 1,000 rpm.
Make sure temperature of fluid in tank rises to 60 to 80°C (140 to 176°F).

WARNING: Warm up engine with shut-off valve fully opened. If engine is started with shut-off valve closed, fluid pressure in oil pump increases to maximum. This will raise oil temperature abnormally.

3. Check pressure with steering wheel fully turned to left and right b positions with engine idling at 1,000 rpm.

CAUTION: Do not hold the steering wheel in a locked position for more than 15 seconds.

Oil pump maximum standard pressure: 8,140 - 8,728 kPa (83 - 89 kg/cm2, 1,180 -1,266 psi)
- If pressure reaches maximum operating pressure, system is OK.
- If pressure increases above maximum operating pressure, check power steering pump flow control valve.
4. If power steering pressure is below the maximum operating pressure, slowly close shut-off valve and check pressure again.

CAUTION: Do not close shut-off valve for more than 15 seconds.

- If pressure increases to maximum operating pressure, gear is damaged. Refer to Power Steering Pump; Service and Repair.
- If pressure remains below maximum operating pressure, pump is damaged. Refer to Power Steering Pump; Service and Repair.
5. After checking hydraulic system, remove Tool and add fluid as necessary. Then completely bleed air out of system.