1. Fully open the shut-off valve (A). Fully open the pressure control valve (B). Start the engine and let it idle. Turn the steering wheel from lock-to-lock several times to warm the fluid to operating temperature at 70 °C (158 °F). Measure steady-state fluid pressure while the engine is idling. If the pump is in good condition, the pressure should be no more than 1,470 kPa (15 kgf/cm 2 , 213 psi). If the pressure is too high, check the outlet hose or valve body unit (see Steering System Troubleshooting). Raise the engine speed to 3,000 rpm (min −1 ), and measure the fluid pressure. If the pump is in good condition, the pressure should be at least 1,470 kPa (15 kgf/cm 2 , 213 psi). If the pressure is too high, repair or replace the pump. 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. Do not keep the shut-off valve closed more than 5 seconds or the pump could be damaged by over-heating. Immediately open the pressure control valve fully. If the pump is in good condition, and the valve is closed, the gauge should read at least this specification:
   K20A6 engine model:
   | 7,650−8,350 kPa (78−85 kgf/cm 2 , 1,110−1,210 psi)
   K20A3 engine model:
   | 7,850−8,550 kPa (80−87 kgf/cm 2 , 1,140−1,240 psi)
A low reading means pump output is too low for full assist. Repair or replace the pump. |