Steering: Service and Repair

1. Disconnect the pressure hose from the oil pump, and then connect the special tools.
2. Bleed the air, and then turn the steering wheel several times while the vehicle is not moving so that the temperature of the fluid rises to approximately 50 - 60°C (122 -140°F).
3. Start the engine and idle it at 1,000 +/-100 RPM.
4. Fully close the shut-off valve of the pressure gauge and measure the oil pump relief pressure to confirm that it is within 8.3 - 9.0 MPa (1,209 - 1,309 psi).

CAUTION: Pressure gauge shut off valve must not remain closed for more than 10 seconds.

5. If it is not within 8.3 - 9.0 MPa (1,209 - 1,309 psi), replace the oil pump.
6. Check whether or not the hydraulic pressure is 0.8 - 1.0 MPa (114 - 142 psi) when no-load conditions are created by fully opening the shut-off valve of the pressure gauge.
7. If it is not within the standard value, the probable cause is a malfunction of the oil line or steering gear box, so check these parts and repair as necessary.
8. Fully open the shut-off valve of the pressure gauge.
9. Turn the steering wheel all the way to the left or right; then check whether or not the retention hydraulic pressure is 8.3 - 9.0 MPa (1,209 - 1,309 psi).
10. When not within 8.3 - 9.0 MPa (1,209 - 1,309 psi), replace the power steering gear box. Remeasure fluid pressure.
11. Remove the special tools, and then tighten the pressure hose to the specified torque.
12. Bleed the system.