The easy answer is to remove the fuse from the imobiliser, re-insert it, then press the remote 'open' button.....the boot should then open. You will still have the problem though. The Nissan dealer will charge a heavy price to have it repaired/replaced, so do what I did. I bought a universal rocker switch, soldered wires to the terminals and then soldered a fuse holder into one of the wires, inserted a 15 amp fuse. Soldered 2 spade connectors to the ends of the wires and removed the 15 amp fuse from the fuse compartment and inserted the spade connectors into the fuse sockets. When I want to open the boot all I do is operate the switch to shut off the power to the immobiliser, switch it back on and press the remote. Boot opens. There should be a blank switch socket to the right of the steering column you can use to place the switch in.
Bill Bennett, June 2012