Power Steering Pressure Test - (4.0L)

Special Tools 

	Adapter, power steering pressure test 211-313 (LRT-57-035A)
	Hose, power steering pressure test 211-011-02 (LRT-57-002)
	Hose, power steering pressure test 211-011-11
	Valve block, power steering pressure test 211-011-01 (LRT-57-001)
	Hose and gauge, power steering pressure test 211-287 (LRT-57-005)
	Adapter, power steering pressure test 211-325 (LRT-57-042)

1. Disconnect the battery ground cable. Refer to Specifications article.
2. Remove the engine cover. Refer to Engine Cover - 4.0L article.
3. Siphon the fluid from the power steering reservoir.
   • Remove the filler cap.
   • Install the filler cap.
4. Position an absorbent cloth to collect fluid spillage.
CAUTION: Before disconnecting or removing the components, ensure the area around the joint faces and connections are clean. Plug open connections to prevent contamination.
NOTE: Some fluid spillage is inevitable during this operation.
NOTE: Care must be taken to avoid contamination of the drive belt.
5. Disconnect the power steering high-pressure pipe union.
   • Remove the bolt.
   • Remove and discard the 2 sealing washers.
   • Position a container to collect the fluid.
6. Install the special tools to the power steering high-pressure port.
   • Install the O-ring seal.
   • Tie the pressure gauge aside under the hood.
7. Install the special tool to the high-pressure union.
   • Install the O-ring seals.
   • Connect the special tool line, to the special tool valve block assembly.
8. Refill the power steering reservoir.
   • Remove the filler cap.
9. Connect the battery ground cable. Refer to Specifications article.
NOTE: Ensure the steering components and test equipment are free from leaks.
NOTE: Maintain the maximum fluid level during the test.
NOTE: Make sure the steering is in the straight ahead position.
NOTE: Under no circumstances must the low pressure spigot be removed from the steering pump.
10. With the test valve open start the engine.
    • Start the engine and turn steering fully lock to lock, stop the engine.
    • Top-up the power steering fluid reservoir.
    • Install the reservoir filler cap.
11. For correct power steering pressures, refer to the steering specification section. See Specifications .
12. With the engine at idle, slowly turn the steering wheel and hold on full lock.
    • Record the pressure reading.
13. Repeat the above procedure for the other side.
    • Record the pressure reading.
14. With the engine at idle, release the steering wheel. The pressure should be, at or below, the pressure specified.
    1. Pressure outside this tolerance, indicates a fault.
15. To determine if the fault is in the steering pump or the steering rack, close the test valve for a maximum of 5 seconds.
16. If the pressures recorded fall outside the given values, replace the power steering pump.
17. If the maximum pump pressure is correct, then suspect the power steering rack.
18. On completion of the test stop the engine, disconnect the battery ground cable and siphon the steering fluid from the reservoir.
    • Remove the filler cap.
    • Install the filler cap.
19. Disassemble the test equipment.
20. Connect the high-pressure line to the power steering pump.
    • Clean the component mating faces.
    • Install the new O-ring seals.
    • Tighten the bolt to 25 Nm (18 lb.ft).
21. Install the engine cover. Refer to Engine Cover - 4.0L article.
22. Connect the battery ground cable.
23. Refill and bleed the power steering. Refer to Power Steering System Filling and Bleeding article.