Connectthe negative cable to the positive cable. (NOT the battery.) You will need a short length, (a foot or so), of light gauge, (14 to 18 gauge, AWG, stranded copper), wire to do this as there is not enough slack in the positive and negative battery cables for them to touch each other. Hold them together for about a minute or so, (some say 5
jimbg He is suggesting that the Telematics battery needs replacing which is in the boot/trunk. Folk in the UK have replaced that and it made no difference though. I think it will takes the certified JLR technician to clear the code from appearing in the instrument panel, however! $400.00 service repair! HTHcPS.