There were some service bulletins for that type of concern, which involves a software update of the PBS controller, which would have to be done by the dealership, I hate to have to say.
- Brakes - Parking Brake Won't Release
S-TYPE, XJ DATE:
JULY 12, 2007
Parking Brake Does not Release
LOW VOLTAGE BLOCKS PARKING BRAKE RELEASE
The parking brake module is sensitive to battery voltage below 8 volts for more than 20 milliseconds. When a vehicle has been left parked for some period it is possible that this threshold may be reached.
Should a customer express concern, re-configure the parking brake module to the new software level to resolve this issue using Integrated Diagnostic System (IDS).
No parts required
IDS DVD107 with Patch File 4
Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken as guidance only. Always refer to DDW to obtain the latest repair time.
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
ELECTRONIC PARTING BRAKE MODULE CONFIGURATION