Prelude L4-2056cc DOHC (1990)
Power Steering Pump: Testing and Inspection
Pump Pressure Check
NOTE: First check the power steering fluid level and pump belt tension.
Check the fluid pressure as follows to determine whether the trouble is in the pump or gearbox.
1. Disconnect the outlet hose from the pump outlet fitting, and install the pump joint adaptor on the outlet.
2. Install the hose joint adaptor to the outlet hose.
3. Install the power steering pressure gauge between the pump and pump joint adaptors as shown.
4. Open the shut-off valve fully.
5. Open the pressure control valve fully.
6. Start the engine and let it idle.
7. Turn the steering wheel from lock-to-lock several times to warm the fluid to operating temperature.
8. Close the shut-off valve, then, close the pressure control valve gradually until the pressure gauge needle is stable.
Read pressure.
9. Immediately open the shut-off valve fully.
CAUTION: Do not keep the shut-off valve closed more then 5 seconds or the pump could be damaged by over-heating.
If the pump is in good condition, the gauge should read at least 7845 - 8826 kPa (80 - 90 kg/cm2, 1138 - 1280 psi).
A low reading means pump output is too low for full assist. Repair or replace the pump.