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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 2229 (Power Steering System) >> Periodic Maintenance >> Power Steering Oil Pump >> On-Vehicle Inspection and Service >> Checking Relief Oil Pressure

Checking Relief Oil Pressure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Before starting work, confirm that the belt tension is within specification. Refer to "CHECKING DRIVE BELTS " (VQ40DE), "CHECKING DRIVE BELTS " (VK56DE).
  1. Connect the Tool between the power steering oil pump discharge connector and the high pressure hose, then bleed the air from the hydraulic circuit with the shut-off valve fully open. Refer to "AIR BLEEDING HYDRAULIC SYSTEM ".
    Tool number:
    Pressure gauge and shut-off valve KV48103500
    (J-26357 and J-26357-10)
    Oil pump side Connector A and O-ring KV48105300-4 and 5295262U10 (-)
    Eye-bolt and O-ring KV48105300-3 and 5295262U00 (-)
    High pressure piping side Connector B and O-ring KV48105300-1 and 5295262U00 (-)
    Nut KV48105300-2 (-)
    Fig 1: Checking Power Steering Oil Pump Relief Oil Pressure
    G04899438Courtesy of NISSAN NORTH AMERICA, INC.
  2. Start the engine. Run the engine until the power steering fluid temperature in reservoir tank reaches 50 - 80°C (122 - 176°F).
    CAUTION:
    • Warm up the engine with the shut-off valve fully opened. If the engine is started with the shut-off valve closed, fluid pressure in the power steering oil pump increases to maximum pressure. This will raise fluid temperature excessively.
    • Do not contact the belt with the hose while the engine is running.
  3. With the engine at idle, close the shut-off valve and read the relief oil pressure.

    Relief oil pressure: Refer to  "OIL PUMP ".

    CAUTION: Do not close the shut-off valve of the pressure gauge for more than 10 seconds.
  4. After measurement, open the shut-off valve slowly.
    • If relief oil pressure is outside the specification, replace the power steering oil pump. Refer to "REMOVAL AND INSTALLATION ".
  5. After inspection, disconnect the oil pressure gauge and oil pressure gauge adapter from the hydraulic circuit, then connect the power steering high pressure hose using new copper sealing washers. Add fluid and bleed the air from the hydraulic circuit thoroughly. Refer to "AIR BLEEDING HYDRAULIC SYSTEM ".
    CAUTION: Do not reuse copper sealing washers.
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