Table of signs of malfunction (Discovery 3)

Sign of malfunction	Possible reasons	Action
Steering wobble	Increased play in the steering system Incorrect steering geometry adjustment	Check for excessive movement or play in the steering system with the engine running. Check for play in several different steering positions. Perform steering geometry and wheel alignment checks. Refer to the appropriate section in the workshop manual.
The steering has a pull to the left or right	Incorrect steering geometry adjustment	Perform steering geometry and wheel alignment checks using four-wheel alignment equipment. Refer to Section 204-00, Suspension System - General, in the workshop manual. Ensure that the direction of rotation is correct for the vehicle's position. (when directional tires are installed)
Jerks/periodic increase in required effort when turning the steering wheel from lock to lock. The steering feels tight and does not provide self-centering.	Seizure of steering or suspension joints Seizure of the steering tie rod end joints or inner tie rod joints Seizure of the steering column or steering cardan joints Misalignment, wear or damage to internal steering components	Disconnect the steering gear from the suspension. Check for free movement in the suspension. Disconnect the steering column from the steering gear. Check the steering column and universal joints for free movement. Check the steering gear for free movement. Repair if necessary.
Noisy operation of the hydraulic power steering	Low or contaminated power steering fluid Incorrect power steering fluid Power steering fluid reservoir filter clogged Air in power steering fluid Kinking or restriction of power steering hoses	Check and top off the prescribed power steering fluid if necessary. Refer to Section 204-00 "Suspension System - General Information" in the service station manual. Check for fluid contamination. Drain fluid from reservoir and visually inspect filter for clogging/obstruction. Repair/replace as necessary. Check for air infiltration into the system. Check power steering hoses for kinks or reduced capacity. Repair if necessary.
Noise in the power steering pump	Low or contaminated power steering fluid Power steering fluid reservoir filter clogged Wear or damage to internal pump components	Check and top up the power steering fluid as needed. Refer to Section 204-00, Suspension System - General Information, in the Service Manual. Check for fluid contamination. Drain the reservoir and visually inspect the filter for clogging/restriction. Repair/replace as needed. Check for excessive pump noise. Repair as needed.
Noise in the steering gear	Low or contaminated power steering fluid Wear or damage to internal steering components	Check and top up the power steering fluid if necessary. Refer to the corresponding section in the service station manual. Check for contamination of the liquid. Check for increased steering noise. Repair it if necessary.
Noise in the steering column	Steering column contamination or lack of lubrication in the steering cardan joints	Check the steering column and its universal joints. Repair if necessary.
The steering feels heavier than it should be throughout its entire operating range. The steering feels too light at high speeds. The steering feels too heavy at low speeds and when the car is stationary.	Insufficient gain	Check the power steering pump pressure. Check the steering column for damage and make sure it rotates freely.