Pump Pressure Test with T/N 07406-0010001: Test

Check the fluid pressure as follows to determine whether the trouble is in the pump or gearbox.

1. Check the power steering fluid level (see FLUID REPLACEMENT ) and pump belt tension (see PUMP BELT INSPECTION AND ADJUSTMENT ).
2. Disconnect the pump outlet hose (A) from the pump outlet with care so as not to spill the power steering fluid on the frame and other parts, Install the P/S joint adapter (pump) on the pump outlet (B) with the P/S joint outlet plate.
   Fig 1: Connecting Special Tools

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. Connect the P/S joint adapter (hose) to the P/S pressure gauge, then connect the pump outlet hose (A) to the P/S joint adapter (hose).
4. Install the P/S pressure gauge to the P/S joint adapter (pump).
5. Fully open the shut-off valve (A).
   Fig 2: Opening The Shut-Off Valve & Pressure Control Valve

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
6. Fully open the pressure control valve (B).
7. Start the engine and let it idle.
8. Turn the steering wheel from lock-to-lock several times to warm the fluid to operating temperature.
9. Measure steady-state fluid pressure while the engine is idling. If the pump is in good condition, the gauge should read less than 1,500 kPa (15 kgf/cm² , 213 psi). If it reads high, check for:
   • Clogged or deformed feed or return line between the pump and gearbox.
   • Clogged valve body unit.
10. Close the pressure control valve, then close the shut-off valve gradually until the pressure gauge needle is stable. Read the pressure.
    NOTE: Do not keep the pressure control valve closed more than 5 seconds or the pump could be damaged by over-heating.
11. Immediately open the pressure control valve fully. If the pump is in good condition, the gauge should read at least 7,600-8,300 kPa (78-85 kgf/cm² , 1,110-1,210 psi). A low reading means pump output is too low for full assist. Repair or replace the pump.