why is my Toyota Corolla E170 (2013-2019) making a whining noise

Solution

1. Preparation

• Tools Required: Socket set, screwdrivers, power steering fluid, funnel, safety gloves, and safety goggles.
• Ensure the vehicle is parked on a level surface, and the engine is off. Disconnect the battery for safety.

2. Check and Refill Power Steering Fluid

1. Locate the power steering fluid reservoir.
2. Remove the cap and check the fluid level; if low, add the appropriate type of power steering fluid.
3. Replace the cap securely.

3. Inspect and Replace Serpentine Belt

1. Remove the belt by loosening the tensioner pulley with a socket and ratchet.
2. Inspect the belt for any signs of wear or damage (cracks, fraying).
3. If damaged, replace with a new serpentine belt, ensuring it is routed correctly around all pulleys.

4. Bleed Power Steering System

1. With the power steering fluid filled, turn the steering wheel from lock to lock several times with the engine running to purge air.
2. Check fluid levels again and add if necessary.

5. Check Alternator and Accessories

1. Visually inspect the alternator for any signs of wear or unusual noise while the engine is running.
2. If the alternator is noisy, consider replacing it.