Pump Pressure Test with T/N 07406-0010001

Special Tools Required 

• P/S joint adapter (pump) 07VAK-P8A011A
• P/S joint adapter plate (pump) 07ZAK-S7CA100
• P/S joint adapter (hose) 07ZAK-S7CA200
• P/S pressure gauge 07406-0010001

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  ).
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).
   Fig 1: Disconnecting Pump Outlet Hose

   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 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: Fully Opening Shut-Off 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 at 158°F(70°C).
9. Measure steady-state fluid pressure while the engine is idling. If the pump is in good condition, the pressure should be no more than 1,500 kPa (15 kgf/cm² , 214 psi). If the pressure is too high, check the outlet hose or valve body unit, go to Steering System Troubleshooting.
10. Raise the engine speed to 3,000 RPM, and measure the fluid pressure. If the pump is in good condition, the pressure should be at least 1,500 kPa (15 kgf/cm² , 214 psi). If the pressure is too high, repair or replace the pump.
11. Lower the engine speed and let it idle. Close the shut-off valve, then close the pressure control valve gradually until the pressure gauge needle is stable. Read the pressure.
    NOTE: Do not keep the shut-off valve closed more than 5 seconds or the pump could be damaged by overheating.
12. Immediately open the shut-off valve fully. If the pump is in good condition, the gauge should read at least this specification:

7,460-8,140 kPa (76-83 kgf/cm ²  , 1,080-1,180 psi) 

A low reading means pump output is too low for full assist. Repair or replace the pump.