Diagnosing steering system faults requires combining symptoms with system checks. If the steering wheel rotation resistance increases, it is necessary to check whether the power steering pump fluid is insufficient or deteriorated, and simultaneously inspect for internal wear of the steering gear or failure of seals. For deviation problems, first confirm the consistency of tyre pressure and tread patterns, then check suspension components such as shock absorbers or four-wheel alignment data. Steering fluid leaks usually present as red or transparent fluid accumulating at the steering gear or hose connections, and aging seals need to be replaced. For electronic power steering systems, a diagnostic tool is required to read fault codes to check for abnormalities in sensors or actuators. It is best to regularly check the condition of the steering fluid and the integrity of the dust boots to prevent sand and dust from exacerbating component wear. If the steering wheel returns slowly, it may involve insufficient lubrication of the steering knuckle or rusting of the tie rod ball joint, requiring professional lubrication or replacement. Complex faults such as high-speed vibration require tyre balancing and checking of suspension geometric parameters, while abnormal noise during low-speed steering should first rule out issues with the steering column universal joint. When repairing, priority should be given to using the manufacturer-specified fluid to avoid hydraulic system failure caused by mixing.
