Both the power steering and brake assist have gone out suddenly.
There is adequate fluid in the P/S pump, no evidence of leaks, and no abnormal noise coming from the pump. Are both of these systems run off of the same pump? We are currently having some very cold temps (near zero degrees) - any relationship there?
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I think that van has "hydroboost" brake assist instead of vacuum powered assist. Hydroboost uses pressure from the power steering pump to assist the brakes. However, I am unsure where the problem is. It could be a leak in the hydroboost itself, a leak in the line, a bad pump, or as easy as low power steering fluid.
CAUTION: If the air is not purged from the power steering system correctly, premature power steering pump failure can result. The condition can occur on pre-delivery vehicles with evidence of aerated fluid or on vehicles that have had steering component repairs.
NOTE: A whine heard from the power steering pump can be caused by air in the system. The power steering purge procedure must be carried out prior to any component repair for which power steering noise complaints are accompanied by evidence of aerated fluid. Remove the power steering fluid reservoir cap. Check the fluid.
Raise the front wheels off the floor. For additional information, refer to Section 100-02 .
Tightly insert the stopper of the vacuum pump into the reservoir.
Start the engine.
Install the vacuum pump, apply vacuum and maintain maximum vacuum of 68-85 kPa (20-25 in-Hg).
CAUTION: Do not hold the steering wheel against the stops for more than 3 to 5 seconds at a time. Damage to the power steering pump can occur. Cycle the steering wheel fully from stop to stop 10 times.
Stop the engine.
Release the vacuum and remove the vacuum pump.
CAUTION: Do not overfill the reservoir. Fill the reservoir and install the reservoir cap.
Visually inspect the power steering system for leaks.
The power steering cap is clearly marked so you should be able to view the reservoir to determine if it is low. If low, top it off and see what happens. But be careful.
It sounds as if the fluid is triggering a fault that turns on the lights. I would be very careful if you try to drive this vehicle, you may suddenly find the steering is VERY hard to turn. Get it to a trustworthy shop as soon as possible. If the fluid leaks fast enough to empty the power steering you could crash. It would be cheaper to have it hauled to a shop than risk a costly accident.
You have what they call a hydro boost system, the power steering pump give power steering assist, and give power brakes, so if your power steering hose looses fluid you get not power steering and no power brakes, So check the power steering hose for leaks if there is no leaks replace the powersteering pump
are you leaking power steering fluid? is there any left in the car? normally all you have for power steering is a pump with fluid and an assist ram, if you hear hissing my guess would be that you blew the High end hose in the system, if it happened while driving with little turning such as freeway driving, you wouldn't notice until you got off and were driving slower and making more turns,, check your fluid, if its empty filling it won't do much good until the hose is replaced, but don't drive to many miles as it will end up burning out the pump
This sounds like the hydroboost unit is leaking.behind the master cylinderThe braking system on this using the power steering pump to provide power assisted brakes instead of a brake booster. The hydroboost unit most likely needs replaced.
Check your power steering fluid level. The power brakes are hydraulic
assist and get hydraulic pressure from the power steering pump. If the
fluid level is good you may have a bad pump. If the fluid level is low
fill it up and find the leak .
Hello altgraph1: My name is Roger and I can help. The power steering and the brakes are directly connected. If the power steering pump fails you will also loose the brake assist. This vehicle does not have a vacuum booster you have a hydro-boost brake system. This unit uses the power steering pressure to assist the stopping of the vehicle. You will need special tools to determine if the power steering pump failed or if the hydro-boost system failed. Most likely the power steering pump failed. How ever to be sure it should be tested first. Should you need further help please just ask. Please rate the answer you received. Thank You for using Fix Ya. Roger