To test the power steering pump at home, first check if the steering fluid level is within the standard range; if it is low, top it up with hydraulic oil that meets the specifications. Start the engine and let it idle, then turn the steering wheel left and right several times to purge air from the system while observing if bubbles appear on the fluid surface (indicating air ingress). If steering is accompanied by a high-pitched noise or the steering wheel becomes noticeably heavier, this may indicate pump wear or insufficient pressure. Connect a mechanical pressure gauge to the pump's outlet line, measure the baseline pressure at idle with the valve fully open (typically no less than 1500 kPa), then close the valve to record the peak pressure (normal range is approximately 6400-7400 kPa). Routine maintenance should include monitoring for sudden loss of power assist, emulsified hydraulic oil (indicating water contamination), or leaks at pipe connections. It is best to replace the manufacturer-specified fluid every 40,000 kilometres or 2 years to prolong pump service life. If test results are abnormal, consult a professional technician for further diagnosis and disassembly to prevent secondary damage to the hydraulic system from improper repairs.
