Fuel injector communication system

An injector (56) for a fuel injection system comprising: input means (51a,51b) for receiving drive signals from an injector drive circuit for controlling operation of the injector, and; an ID chip (62) wherein the injector further comprises an electronic latch means (68) arranged such that (i) in response to a first condition, the electronic latch means is arranged to be enabled such that the ID chip is in communication with the injector drive circuit via the input means, and; (ii) in response to a second condition, the electronic latch means is arranged to be disabled such that the ID chip is not in communication with the injector drive circuit via the input means.