Quote:
Originally posted by endosj3
... Question though....Has anybody heard a sound inside the driver's side of the dash that almost sounds like a motor turning on, sitting on for a few seconds, and then shutting off? It almost sounds like a window regulator or like a power antenna going up. It doesn't happen a lot but I can hear it probably a handful of times on my 30 min commute to work...
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The 4th Gen T4R uses a brake booster pump, not a vacumn booster, for the brake assist. I think you are hearing this pump cycling. You can check this by remaining parked, ignition on but engine off. Pump the brakes on and off several times. You'll hear the pump cycle on and off. This is normal unless you think it's excessively loud.
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'04 SR5 V6 4x4 Galactic Grey Mica. Delivered 03/17/2004. Link to my mod list in posts 7, 8 & 9 of this thread:
http://www.toyota-4runner.org/showthread.php?t=21354
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