Question about 2009 Jaguar XK 3.5
Car has a good battery but will not start, the on board computer says low brake fluid, but the fluid level is full, computer also says parking brake not applied and it is not applied, computer goes through random tasks but car still does not start
Don;t play with jag computers. let your local dealer scan with factory scanner. most you can do your self is check all fuses (under hood to)
Posted on Mar 23, 2014
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Posted on Jan 02, 2017
You have two separate issues here. First, the delay going into gear may
benefit from a fluid change providing that the cause isn't just low
fluid level but not always. It will not help immediately, because
likely there is a lazy shift valve caused by a small amount of varnish
which may need some time to clean up. It may not help at all if the
valve is sticking because of wear or other internal mechanical problem.
Your other problem is with going out of park. Actually, that is a normal condition that happens in every vehicle, but is more noticeable in heavier ones or those with slightly shorter shift arms on the transmission itself. Virtually every manufacturer uses the same method of locking a transmission in park. This is done by using a square piece of steel that fits into a square slot on the outside of an internal drum which is locked to the mainshaft of the transmission. Around that drum there are multiple slots as well as "blank" areas between them so that you can select park without having the vehicle need to roll a full revolution before the piece of steel (called the parking pall) can engage the drum. It does need to roll a bit till it finds a slot though. Putting the parking brake on takes tension from the drum and pall, so that the pall is not "loaded" by the weight of the vehicle, which makes it difficult to pull it back to disengage it. The weight of the vehicle and severity of the incline come into play here, as they add to the amount of loading. The length of the trans shift arm provides either more or less leverage, making movement either easier or more dificult...so there is a variable between vehicles for all of the different reasons above.
Every owners manual will contain instructions to use the parking brake on hills but don't explain why...now you know. Parking against a curb, you are loading the lock mechanism from the steering side which is why you should avoid parking like that.
Long answer to an easy question but that's how it works!!!
Posted on May 25, 2009
Try a reset of the park brake.
Make sure you have your radio code.!!
Disconnect the battery - leave for 10 Min's.
Turn ignition on. If fault has not reset - try the following
Apply foot brake (not too hard)
Apply park-brake switch following instructions on the message center.
Use this method for any park brake fault as most of the time it fixes the minor problems caused by glitches and low battery voltage.
hope this helps good luck
Posted on Feb 09, 2010
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