XK-8 Convertible (X100) V8-4.0L (AJ27) (2001)
Technical Service Bulletin # 414-S843
Campaign - Battery Drain (Intermittent Wiper Mode)
2001-02 MY XK Range
Battery Quiescent Drain - Wipers In Intermittent- Service Action S843
A concern has been identified of possible premature battery drain on a number of 2001-02 MY XK Range vehicles within the above VIN range.
The battery could become discharged if the ignition is switched to 'OFF' with either of the following conditions:
The wiper switch in intermittent mode; position 1 or 2.
The wiper switch in auto wiper mode with the wipers still sweeping, with the vehicle locked after 15 seconds.
The instrument pack will continue to request Standard Corporate Protocol (SCP) network status messages preventing the modules from entering 'sleep
mode', resulting in quiescent drain increasing from 25 mA to 660 mA. This will reduce the stand time from a specified period of 1 month+ to 1 or 2 days.
To eliminate this condition a replacement link lead is now available that changes the windshield wiper switch from direct-to-ground to
ignition-switched-ground, effectively disconnecting the wiper switch when the ignition is switched to 'Off'.
Install a replacement link lead, at the next service opportunity, as described in the procedure.