why does my epb lock on after standing for a week on my 2007 stype

 

Discharged battery?

What is the age and condition of the battery? A failing or weak battery can cause electrical 'faults' to occur.

 

the battery is a new one, but after a week the epb locks on,i can get it off using the reset procedure

 

Hi
You Have to plug in with Jaguar IDS/SDD software,
It will give you a fault
odds are its either the epb motor on its way out, stiff handbrake cables or stiff caliper handbrake levers
the epb remember what position it reached when hand brake is on and off, if that position can't be reached, then it throws up a fault
the gearbox on the epb is known to fail due to the lack of grease/lubricant inside it, causing it to stick and fail
cheers
Joe

 

th epb shou d apply immediately every-time the engine i shut off, not after a week.

 

I have recently replaced the rear brake hoses on my S-Type. This involved removal of the rear calipers and the handbrake cables being undone from the calipers. In the process, I noticed that the cables were very stiff inside the outer sleeve. I raised the ends of the cables and allowed a light oil to trickle down into the sleeves. The difference after they had been allowed to become lubricated was astonishing, much freer movement. Once all was reassembled, there was a marked difference in the handbrake being reapplied, more movement on the handbrake arms on the calipers. I can wholeheartedly recommend lubricating the cable sleeves this way. The cables could be undone with the calipers in place, just remove the outer sleeves from the callipers (barb ended plastic fittings through a hole in the caliper bracket), the actuating cables are a bit more difficult, I used some strong nylon string and pulled them off the lever. Bend the cables and sleeves upwards and tie them off (I used a piece of copper wire) into the coil spring and drip the oil along the cable to allow it to flow down into the sleeves. I hope this helps.

 

New battery won't make much difference after a week if you have a significant quiescent drain issue. Troubleshooting How-To in the stickies.

To piggy-back Mikey's statement, the EPB trigger is pulling the key out...not actually shutting the engine off, though you normally have to accomplish the latter prior to performing the former ("Finish to Start" relationship for you EVMS'ers out there)

For this reason, particularly on inclines, you should always keep your foot on the service brake until you have removed the key.