A whine heard from the power steering pump can be caused by air in the system. The power steering purge procedure must be carried out prior to any component repair for which power steering noise complaints are accompanied by evidence of aerated fluid.
- Before servicing the vehicle, refer to the Precautions section.
- Remove the power steering pump reservoir cap and check the fluid.
- Raise the front wheels off the floor.
- Tightly insert the stopper of a hand-operated vacuum pump into the reservoir.
- Start the engine.
- Install the vacuum pump, apply vacuum, and maintain the maximum vacuum of 20-25 inches Hg (68-85 kPa).
If equipped with Hydro-Boost, apply the brake pedal twice.
WARNINGDo not hold the steering wheel against the stops for more than 3 to 5 seconds at a time. Damage to the power steering pump can occur.
- Cycle the steering wheel fully from stop-to-stop 10 times.
- Stop the engine.
- Release the vacuum and remove the vacuum pump and refill the reservoir as necessary.
- Start the engine and repeat the procedure.
- Visually inspect the power steering system for leaks.
- Fill the reservoir as needed and visually inspect the power steering system for leaks.
- Install the reservoir cap.