Checking pump pressure
Check the fluid pressure as follows to determine if there is a problem with the pump or steering rack.
Note: First check the power steering fluid level and pump belt tension.
Attention. Disconnect the high pressure pipe carefully to avoid spilling power steering fluid on the subframe and other parts.
1. Disconnect the pump outlet hose and install the adapter block on the pump outlet.
2. Connect the adapter hose to the steering pressure gauge, then connect the outlet hose to the adapter (hose).
3. Attach the steering pressure gauge to the pump adapter as shown below.
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 heat the fluid to operating temperature.
8. Measure the steady-state fluid pressure while idling with the shut-off valve fully open. If the pump is in good condition, the pressure gauge should show at least 1500 kPa (15 kgf/cm).
If the pressure gauge reading is higher, check the supply line or valve assembly.
9. Close the shut-off valve, then gradually close the pressure control valve until the pressure gauge needle stops. Take readings.
10. Immediately open the shut-off valve fully.
Attention. Do not leave the shut-off valve closed for more than 5 seconds or the pump may be damaged by overheating.
Left hand drive:
- 6,400 - 7,400 kPa (65-75 kgf/cm2)
Right hand drive:
- 5,400 - 6,400 kPa (55-65 kgf/cm2)
A low reading means the pump output pressure is too low to provide assist force. Repair or replace the pump.