How to Solve Heavy Steering in a Prado?
4 Answers
There is a lack of lubricating oil in the screws inside the steering wheel. This requires removing the steering wheel cover and adding lubricating oil inside. The steering gear may also malfunction. Usually, if the steering is turned too fully during turns, it places a greater load on the steering gear.
When driving a Prado on long trips, I dread sudden steering wheel heaviness the most. If this happens, don’t rush to the repair shop. First, check three things: Low tire pressure can make the steering wheel feel welded in place, especially when fully loaded; for older hydraulic power steering models, check if the steering fluid is dark or low—topping up with specialized oil might help; for newer electric power steering models, focus on inspecting the wheel speed sensors, as mud buildup from off-roading can cause the computer to misjudge. Another small detail: prolonged stationary steering can burn out the power steering motor—this habit needs to change. If the steering mechanism makes a clunking sound after rough roads, it’s likely the steering tie rod ball joint is worn out—replacing it with an OEM part will restore smooth steering.
A heavy steering wheel is no trivial matter. Last time I drove my buddy's Prado, it nearly caused an accident. If you feel jerky resistance when turning, it's likely due to rust on the steering column universal joint - spraying some rust remover can help. Hearing a buzzing sound when steering is a red flag; the electric power steering motor might be failing. The most straightforward check is lifting the chassis - a torn CV boot allows grit into the joint, increasing steering resistance by 30%. Remember when the dealership quoted ¥2,800 for a complete replacement? Actually, a reputable repair shop can install upgraded steering gear bearings for under ¥500 in labor.
The most common issue with electric power steering systems is torque sensor drift. A diagnostic tool can read the data stream to detect if the actual torque value exceeds the standard. Here's a cost-saving method: disconnect the negative battery terminal for ten minutes to let the ECU relearn the steering parameters. If there's a clunking noise from the steering gear on bumpy roads, check if the steering gear mounting bracket is cracked. Last year, my car experienced intermittent power steering on high-altitude roads, and replacing the crankshaft position sensor fixed the issue—this part affects engine signal transmission. A deformed spare tire carrier can also worsen steering misalignment.
