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How to bleed the Toyota KDSS?

2 Answers

MacEden

07/24/25 9:05am

When bleeding the Toyota KDSS, there are two modes: 1. When the Toyota KDSS is bled in normal driving mode: When the vehicle is in a turning state, the outer suspensions of both the front and rear wheels are compressed, and the inner suspensions are extended. At this time, the stabilizer bar twists to resist body roll, and there is no fluid flow between the two hydraulic pumps connected by the two pipelines. It works like a normal suspension but can effectively enhance anti-roll capability and improve stability. During highway driving, it suppresses suspension extension, and the stabilizer bar twists to inhibit steering tilt, enhancing handling and comfort. 2. When the Toyota KDSS is bled in off-road mode: When one of the four wheels encounters an obstacle and is lifted, the suspension of the lifted wheel is compressed, and the stabilizer bar rises together with the hydraulic pump. Fluid flows between the two connected hydraulic pumps, absorbing the twist of the stabilizer bar. Since the stabilizer bar does not twist, the suspension travel is greater than that of a normal suspension, and it can be adjusted according to different road conditions, improving the vehicle's stability and comfort.

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StMiranda

08/11/25 4:30am

I own a Prado, and after driving it for a while, I noticed the KDSS suspension felt a bit stiff, suspecting there might be air trapped inside. I once tried bleeding it myself. The process was quite laborious: park the car on level ground, start the engine to pressurize the system, then locate a vent valve near the chassis, slowly loosen it with a wrench to let the fluid and bubbles escape. You must use a collection cup to catch the fluid to avoid making a mess on the ground. Once no more bubbles come out, quickly top up the hydraulic fluid to the standard level. A word of caution: this job is quite risky without the proper tools. The first time I did it, I nearly got splashed with fluid all over. Afterward, the ride became much smoother, but if you're a novice, it's better not to take the risk—heading to a 4S shop is definitely safer.

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